static Program make(void)
{
Program prog;
VertexShader vs;
vs.Source(
"#version 330\n"
"in vec4 Position;"
"in ivec3 TexCoord;"
"out ivec3 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = Position;"
" vertTexCoord = TexCoord;"
"}"
).Compile();
prog.AttachShader(vs);
GeometryShader gs;
gs.Source(
"#version 330\n"
"layout (points) in;"
"layout (triangle_strip, max_vertices=24) out;"
"uniform float FadeCoef;"
"uniform sampler3D Pattern, FadeMap;"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"mat4 Matrix = ProjectionMatrix*CameraMatrix;"
"uniform vec3 LightPosition = vec3(100, 120, 150);"
"in ivec3 vertTexCoord[1];"
"out vec3 geomNormal;"
"out vec3 geomLightDir;"
"out vec3 geomTexCoord;"
"out float geomShadow;"
"float get_cell(ivec3 offs)"
"{"
" ivec3 coord = vertTexCoord[0]+offs;"
" float patt = texelFetch(Pattern, coord, 0).r;"
" float fade = texelFetch(FadeMap, coord, 0).r;"
" return clamp("
" (patt != 0.0)?"
" (FadeCoef-fade)*256.0:"
" 0.0, 0.0, 1.0"
" );"
"}"
"const ivec3 coffs[6] = ivec3[6]("
" ivec3(+1, 0, 0),"
" ivec3(-1, 0, 0),"
" ivec3( 0,+1, 0),"
" ivec3( 0,-1, 0),"
" ivec3( 0, 0,+1),"
" ivec3( 0, 0,-1) "
");"
"const mat3 tmats[6] = mat3[6]("
" mat3( 0, 0, 1, 0,-1, 0, 1, 0, 0),"
" mat3( 0, 0,-1, 0,-1, 0, -1, 0, 0),"
" mat3(-1, 0, 0, 0, 0, 1, 0, 1, 0),"
" mat3(-1, 0, 0, 0, 0,-1, 0,-1, 0),"
" mat3( 1, 0, 0, 0, 1, 0, 0, 0, 1),"
" mat3(-1, 0, 0, 0, 1, 0, 0, 0,-1) "
");"
"const vec3[8] nvec = vec3[8]("
" vec3( 0,-1,+1),"
" vec3(+1,-1,+1),"
" vec3(+1, 0,+1),"
" vec3(+1,+1,+1),"
" vec3( 0,+1,+1),"
" vec3(-1,+1,+1),"
" vec3(-1, 0,+1),"
" vec3(-1,-1,+1) "
");"
"void main(void)"
"{"
" float cc = get_cell(ivec3(0,0,0));"
" if(cc > 0.0)"
" {"
" float c05 = 0.5*cc;"
" float c0 = 0.5-c05;"
" float c1 = 0.5+c05;"
" for(int f=0; f!=6; ++f)"
" if(get_cell(coffs[f]) < 1.0)"
" {"
" int config = 0x0;"
" vec3 noffs[8];"
" vec3 nml = tmats[f][2];"
" float aoc = get_cell(ivec3(nml*2));"
" aoc += 0.8*get_cell(ivec3(nml*3));"
" for(int n=0; n!=8; ++n)"
" {"
" noffs[n] = nvec[n]*tmats[f];"
" float nc = get_cell(ivec3(noffs[n]));"
" aoc += 0.2*get_cell(ivec3(noffs[n]+nml));"
" aoc += 0.1*get_cell(ivec3(noffs[n]+nml*2));"
" config |= (nc>0.0)?0x1<<n:0x0;"
" }"
" float aom = float(config);"
" geomNormal = tmats[f][2];"
" geomShadow = max(1.0-sqrt(aoc), 0.0);"
" vec3 cpos = gl_in[0].gl_Position.xyz;"
" gl_Position = vec4(cpos+noffs[7]*c05, 1.0);"
" geomLightDir = LightPosition - gl_Position.xyz;"
" gl_Position = Matrix * gl_Position;"
" geomTexCoord = vec3(c0, c1, aom);"
" EmitVertex();"
" gl_Position = vec4(cpos+noffs[1]*c05, 1.0);"
" geomLightDir = LightPosition - gl_Position.xyz;"
" gl_Position = Matrix * gl_Position;"
" geomTexCoord = vec3(c1, c1, aom);"
" EmitVertex();"
" gl_Position = vec4(cpos+noffs[5]*c05, 1.0);"
" geomLightDir = LightPosition - gl_Position.xyz;"
" gl_Position = Matrix * gl_Position;"
" geomTexCoord = vec3(c0, c0, aom);"
" EmitVertex();"
" gl_Position = vec4(cpos+noffs[3]*c05, 1.0);"
" geomLightDir = LightPosition - gl_Position.xyz;"
" gl_Position = Matrix * gl_Position;"
" geomTexCoord = vec3(c1, c0, aom);"
" EmitVertex();"
" EndPrimitive();"
" }"
" }"
"}"
).Compile();
prog.AttachShader(gs);
FragmentShader fs;
fs.Source(
"#version 330\n"
"uniform sampler2DArray AmbiOcclMaps;"
"in vec3 geomNormal;"
"in vec3 geomLightDir;"
"in vec3 geomTexCoord;"
"in float geomShadow;"
"out vec3 fragColor;"
"void main(void)"
"{"
" float amoc = texture(AmbiOcclMaps, geomTexCoord).r;"
" float shdw = sqrt(0.5*(1.0+geomShadow));"
" float ambi = 0.5;"
" float diff = max(dot(geomNormal, normalize(geomLightDir)), 0)*0.6;"
" float light = ambi*amoc*shdw + (0.8*amoc*shdw+0.2)*diff;"
" fragColor = vec3(1,1,1)*light;"
"}"
).Compile();
prog.AttachShader(fs);
prog.Link().Use();
return std::move(prog);
}
static Program make(void)
{
VertexShader vs;
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix,CameraMatrix,ModelMatrix;"
"mat3 RotMatrix = mat3(ModelMatrix);"
"const vec3 LightPosition = vec3(12.0, 11.0, 17.0);"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertLightDir;"
"out vec3 vertNormal;"
"out vec3 vertColor;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertLightDir = LightPosition - gl_Position.xyz;"
" vertNormal = RotMatrix * Normal;"
" vertColor = normalize("
" vec3(1, 1, 1) - "
" mix(vertNormal, Position.xyz, 0.5)"
" );"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
).Compile();
FragmentShader fs;
fs.Source(
"#version 330\n"
"uniform sampler2DRect DepthTex;"
"in vec4 gl_FragCoord;"
"in vec3 vertLightDir;"
"in vec3 vertNormal;"
"in vec3 vertColor;"
"out vec3 fragColor;"
"void main(void)"
"{"
" float w = gl_FragCoord.w;"
" float sum_bz = 0.0;"
" const int nd = 2;"
" float ns = 0.0;"
" for(int dy=-nd; dy!=(nd+1); ++dy)"
" for(int dx=-nd; dx!=(nd+1); ++dx)"
" {"
" ivec2 TexelCoord = ivec2(gl_FragCoord.xy)+ivec2(dx, dy);"
" float bz = texelFetch(DepthTex, TexelCoord).x;"
" if(bz < 1.0)"
" {"
" sum_bz += bz;"
" ns += 1.0;"
" }"
" }"
" float DepthDiff = (sum_bz/ns)/w - gl_FragCoord.z/w;"
" DepthDiff = clamp(pow(mix(1.0, 0.0, DepthDiff*4.0), 3.0), 0.0, 1.0);"
" vec3 Normal = normalize(vertNormal);"
" vec3 LightDir = normalize(vertLightDir);"
" float Ambi = 0.2;"
" float Diff = 0.4*max(dot(LightDir, Normal)+0.1, 0.0);"
" fragColor = (Ambi + Diff + DepthDiff) * vertColor;"
"}"
).Compile();
Program prog;
prog.AttachShader(vs).AttachShader(fs).Link().Use();
return std::move(prog);
}
CubeExample(void)
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"in vec4 Position;"
"out vec3 vertColor;"
"void main(void)"
"{"
" float angle = gl_InstanceID * 10 * 2 * 3.14159 / 360.0;"
" float cx = cos(angle);"
" float sx = sin(angle);"
" mat4 ModelMatrix = mat4("
" cx, 0.0, sx, 0.0,"
" 0.0, 1.0, 0.0, 0.0,"
" -sx, 0.0, cx, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" ) * mat4("
" 1.0, 0.0, 0.0, 0.0,"
" 0.0, 1.0, 0.0, 0.0,"
" 0.0, 0.0, 1.0, 0.0,"
" 12.0, 0.0, 0.0, 1.0 "
" );"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" ModelMatrix *"
" Position;"
" vertColor = abs(normalize((ModelMatrix*Position).xyz));"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"in vec3 vertColor;"
"out vec4 fragColor;"
"void main(void)"
"{"
" fragColor = vec4(vertColor, 1.0);"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the cube
cube.Bind();
// bind the VBO for the cube vertices
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Positions(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
VertexAttribArray attr(prog, "Position");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
//
gl.ClearColor(0.9f, 0.9f, 0.9f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
SkyBoxExample()
: sky_box(List("Position").Get(), shapes::SkyBox())
, shape(List("Position")("Normal").Get(), shapes::WickerTorus())
, sky_box_prog()
, sky_box_projection_matrix(sky_box_prog, "ProjectionMatrix")
, sky_box_camera_matrix(sky_box_prog, "CameraMatrix")
, shape_projection_matrix(shape_prog, "ProjectionMatrix")
, shape_camera_matrix(shape_prog, "CameraMatrix")
, shape_model_matrix(shape_prog, "ModelMatrix")
, sky_box_sun_position(sky_box_prog, "SunPosition")
, shape_sun_position(shape_prog, "SunPosition")
, shape_camera_position(shape_prog, "CameraPosition") {
VertexShader sky_box_vs;
sky_box_vs.Source(
"#version 140\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"mat4 Matrix = ProjectionMatrix*CameraMatrix;"
"in vec3 Position;"
"out vec3 vertTexCoord;"
"void main()"
"{"
" gl_Position = Matrix * vec4(Position * 100.0, 1.0);"
" vertTexCoord = Position;"
"}");
sky_box_vs.Compile();
sky_box_prog.AttachShader(sky_box_vs);
VertexShader shape_vs;
shape_vs.Source(
"#version 140\n"
"uniform vec3 SunPosition;"
"uniform vec3 CameraPosition;"
"uniform mat4 ProjectionMatrix,CameraMatrix,ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal, vertViewRefl, vertLightDir;"
"void main()"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertViewRefl = reflect("
" gl_Position.xyz - CameraPosition,"
" vertNormal"
" );"
" vertLightDir = SunPosition - gl_Position.xyz;"
" gl_Position = ProjectionMatrix*CameraMatrix*gl_Position;"
"}");
shape_vs.Compile();
shape_prog.AttachShader(shape_vs);
FragmentShader sky_box_fs;
sky_box_fs.Source(
"#version 140\n"
"in vec3 vertTexCoord;"
"out vec3 fragColor;"
"vec3 sky_color(vec3 vd);"
"void main()"
"{"
" fragColor = sky_color(normalize(vertTexCoord));"
"}");
sky_box_fs.Compile();
sky_box_prog.AttachShader(sky_box_fs);
FragmentShader shape_fs;
shape_fs.Source(
"#version 140\n"
"in vec3 vertNormal, vertViewRefl, vertLightDir;"
"out vec3 fragColor;"
"vec3 sky_color(vec3 vd);"
"void main()"
"{"
" float l = max(dot(normalize(vertNormal), "
"normalize(vertLightDir))+0.1, 0.0);"
" float a = 0.1;"
" fragColor = "
" 0.1*vec3(1.0, 1.0, 1.0)*(a+l)+"
" 0.9*sky_color(normalize(vertViewRefl));"
"}");
shape_fs.Compile();
shape_prog.AttachShader(shape_fs);
FragmentShader sky_fs;
sky_fs.Source(
"#version 140\n"
"const float WorldRadius = 6371000;"
"const float AtmThickness = 50000;"
"const vec3 AirColor = vec3(0.32, 0.36, 0.45);"
"const vec3 LightColor = vec3(1.0, 1.0, 1.0);"
"uniform vec3 SunPosition;"
"uniform samplerCube EnvMap;"
"float atm_intersection(vec3 v)"
"{"
" const vec3 c = vec3(0.0, -WorldRadius, 0.0);"
" const float r = WorldRadius + AtmThickness;"
" const float c_c = dot(-c, -c);"
" float v_c = dot( v, -c);"
" return (-v_c + sqrt(v_c*v_c - c_c + r*r))/AtmThickness;"
"}"
"vec3 sky_color(vec3 vd)"
"{"
" vec3 up = vec3(0.0, 1.0, 0.0);"
" vec3 ld = normalize(SunPosition);"
" vec4 cl = texture(EnvMap, vd);"
" float ai = atm_intersection(vd);"
" float al = max(dot(ld, up) + 0.12, 0.0);"
" float vl = max(dot(vd, ld), 0.0);"
" float ct = (1.0-cl.a)*cl.b;"
" vec3 ac = max(LightColor-AirColor*pow(ai, 0.33), vec3(0.0, 0.0, "
"0.0));"
" vec3 Sun = "
" ac*(vl>0.995+0.004*al ? 1.0:0.0);"
" vec3 Air = "
" min(AirColor*sqrt(pow(al,0.25)*ai), vec3(al, al, al)*1.5)+"
" ac*pow(min(vl+0.001*ai, 1.0), 1024.0/pow(ai, 2.0))+"
" ac*(vl/(1.0+pow(3.0*al, 8.0)))*pow(ai, 0.6)*0.5;"
" vec3 Clouds ="
" ac*pow(min(vl*(cl.g+cl.b), 1.015), 64.0)*pow(ct, 2.0)+"
" ac*pow(min(vl*cl.g+cl.b, 1.020), 32.0)*ct+"
" ac*pow(min(vl*cl.g*cl.b, 1.010), 16.0)*pow(ct, 0.5)+"
" ac*0.7*min(cl.g + cl.b*0.5, 1.0)*al+"
" ac*(cl.g*(1.0-cl.b*0.2)*5.0)*pow(1.0-al, 2.0)*(al)+"
" LightColor*0.5*min(al + cl.g*0.4+cl.b*0.1, 1.0)*sqrt(al);"
" return mix(Air, Clouds, cl.a*(1.0-cl.r*0.8))+Sun*(1.0-cl.a);"
"}");
sky_fs.Compile();
sky_box_prog.AttachShader(sky_fs);
shape_prog.AttachShader(sky_fs);
sky_box_prog.Link();
sky_box.UseInProgram(sky_box_prog);
shape_prog.Link();
shape.UseInProgram(shape_prog);
{
ProgramUniformSampler(sky_box_prog, "EnvMap").Set(0);
ProgramUniformSampler(shape_prog, "EnvMap").Set(0);
Texture::Active(0);
gl.Bound(Texture::Target::CubeMap, env_map)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToEdge)
.WrapT(TextureWrap::ClampToEdge)
.WrapR(TextureWrap::ClampToEdge);
Texture::ImageCM(
0, images::LoadTexture("clouds01-cm_0", false, false));
Texture::ImageCM(
1, images::LoadTexture("clouds01-cm_1", false, false));
Texture::ImageCM(
2, images::LoadTexture("clouds01-cm_2", false, false));
Texture::ImageCM(
3, images::LoadTexture("clouds01-cm_3", false, false));
Texture::ImageCM(
4, images::LoadTexture("clouds01-cm_4", false, false));
Texture::ImageCM(
5, images::LoadTexture("clouds01-cm_5", false, false));
}
gl.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
ShadowVolExample(const ExampleParams& params)
: shape_instr(make_shape.Instructions())
, shape_indices(make_shape.Indices())
, shape_vs(ShaderType::Vertex, ObjectDesc("Shape vertex"))
, depth_vs(ShaderType::Vertex, ObjectDesc("Depth vertex"))
, light_vs(ShaderType::Vertex, ObjectDesc("Light vertex"))
, depth_gs(ShaderType::Geometry, ObjectDesc("Depth geometry"))
, light_gs(ShaderType::Geometry, ObjectDesc("Light geometry"))
, shape_fs(ShaderType::Fragment, ObjectDesc("Shape fragment"))
, depth_fs(ShaderType::Fragment, ObjectDesc("Depthfragment"))
, light_fs(ShaderType::Fragment, ObjectDesc("Light fragment"))
, shape_prog(ObjectDesc("Shape"))
, depth_prog(ObjectDesc("Depth"))
, light_prog(ObjectDesc("Light"))
, tex_side(128)
, sample_count(params.HighQuality()?1024:128)
{
shape_vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"in vec2 TexCoord;"
"out vec3 vertNormal;"
"out vec3 vertLightDir;"
"out vec3 vertLightRefl;"
"out vec3 vertViewDir;"
"out vec3 vertViewRefl;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLightDir = LightPos - gl_Position.xyz;"
" vertLightRefl = reflect("
" -normalize(vertLightDir),"
" normalize(vertNormal)"
" );"
" vertViewDir = (vec4(0.0, 0.0, 1.0, 1.0)* CameraMatrix).xyz;"
" vertViewRefl = reflect("
" normalize(vertViewDir),"
" normalize(vertNormal)"
" );"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
shape_vs.Compile();
shape_fs.Source(
"#version 330\n"
"in vec3 vertNormal;"
"in vec3 vertLightDir;"
"in vec3 vertLightRefl;"
"in vec3 vertViewDir;"
"in vec3 vertViewRefl;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = length(vertLightDir);"
" float d = dot("
" normalize(vertNormal), "
" normalize(vertLightDir)"
" ) / l;"
" float s = dot("
" normalize(vertLightRefl),"
" normalize(vertViewDir)"
" );"
" vec3 ambi = vec3(0.6, 0.3, 0.5);"
" vec3 diff = vec3(0.9, 0.7, 0.8);"
" vec3 spec = vec3(1.0, 0.9, 0.95);"
" fragColor = vec4("
" ambi * 0.3 + "
" diff * 0.7 * max(d, 0.0) + "
" spec * pow(max(s, 0.0), 64), "
" 1.0"
" );"
"}"
);
shape_fs.Compile();
shape_prog.AttachShader(shape_vs);
shape_prog.AttachShader(shape_fs);
shape_prog.Link();
depth_vs.Source(
"#version 330\n"
"uniform mat4 ModelMatrix;"
"uniform vec3 LightPos;"
"in vec4 Position;"
"void main(void)"
"{"
" gl_Position = "
" mat4("
" 1.0, 0.0, 0.0, -LightPos.x,"
" 0.0, 1.0, 0.0, -LightPos.y,"
" 0.0, 0.0, 1.0, -LightPos.z,"
" 0.0, 0.0, 0.0, 1.0"
" )*"
" ModelMatrix *"
" mat4("
" 10.0, 0.0, 0.0, 0.0,"
" 0.0, 10.0, 0.0, 0.0,"
" 0.0, 0.0, 10.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" )*"
" Position;"
"}"
);
depth_vs.Compile();
depth_gs.Source(
"#version 330\n"
"layout(triangles) in;"
"layout(triangle_strip, max_vertices = 18) out;"
"uniform mat4 ProjectionMatrix;"
"const mat4 CubeFaceMatrix[6] = mat4[6]("
" mat4("
" 0.0, 0.0, -1.0, 0.0,"
" 0.0, -1.0, 0.0, 0.0,"
" -1.0, 0.0, 0.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" ), mat4("
" 0.0, 0.0, 1.0, 0.0,"
" 0.0, -1.0, 0.0, 0.0,"
" 1.0, 0.0, 0.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" ), mat4("
" 1.0, 0.0, 0.0, 0.0,"
" 0.0, 0.0, -1.0, 0.0,"
" 0.0, 1.0, 0.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" ), mat4("
" 1.0, 0.0, 0.0, 0.0,"
" 0.0, 0.0, 1.0, 0.0,"
" 0.0, -1.0, 0.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" ), mat4("
" 1.0, 0.0, 0.0, 0.0,"
" 0.0, -1.0, 0.0, 0.0,"
" 0.0, 0.0, -1.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" ), mat4("
" -1.0, 0.0, 0.0, 0.0,"
" 0.0, -1.0, 0.0, 0.0,"
" 0.0, 0.0, 1.0, 0.0,"
" 0.0, 0.0, 0.0, 1.0 "
" )"
");"
"void main(void)"
"{"
" for(gl_Layer=0; gl_Layer!=6; ++gl_Layer)"
" {"
" for(int i=0; i!=3; ++i)"
" {"
" gl_Position = "
" ProjectionMatrix *"
" CubeFaceMatrix[gl_Layer]*"
" gl_in[i].gl_Position;"
" EmitVertex();"
" }"
" EndPrimitive();"
" }"
"}"
);
depth_gs.Compile();
depth_fs.Source(
"#version 330\n"
"void main(void)"
"{"
" gl_FragDepth = gl_FragCoord.z;"
"}"
);
depth_fs.Compile();
depth_prog.AttachShader(depth_vs);
depth_prog.AttachShader(depth_gs);
depth_prog.AttachShader(depth_fs);
depth_prog.Link();
depth_prog.Use();
Uniform<Mat4f>(depth_prog, "ProjectionMatrix").Set(
CamMatrixf::PerspectiveX(
RightAngles(1.0),
1.0,
0.1,
10.0
)
);
// bind the VAO for the shape
shape.Bind();
shape_positions.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribSlot location;
if(VertexAttribArray::QueryCommonLocation(
"Position",
location,
shape_prog,
depth_prog
))
{
VertexAttribArray shape_attr(location);
shape_attr.Setup(n_per_vertex, DataType::Float);
shape_attr.Enable();
}
else assert(!"Inconsistent 'Position' location");
}
shape_normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
shape_prog.Use();
VertexAttribArray attr(shape_prog, "Normal");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
light_vs.Source(
"#version 330\n"
"in vec3 Position;"
"out float vertZOffs;"
"uniform vec3 LightPos;"
"uniform int SampleCount;"
"void main(void)"
"{"
" float hp = (SampleCount-1) * 0.5;"
" vertZOffs = (gl_InstanceID - hp)/hp;"
" gl_Position = vec4(Position + LightPos, 1.0);"
"}"
);
light_vs.Compile();
light_gs.Source(
"#version 330\n"
"layout(points) in;"
"layout(triangle_strip, max_vertices = 4) out;"
"in float vertZOffs[];"
"out vec4 geomPosition;"
"uniform mat4 CameraMatrix, ProjectionMatrix;"
"uniform vec3 ViewX, ViewY, ViewZ;"
"uniform float LightVolSize;"
"void main(void)"
"{"
" float zo = vertZOffs[0];"
" float yo[2] = float[2](-1.0, 1.0);"
" float xo[2] = float[2](-1.0, 1.0);"
" for(int j=0;j!=2;++j)"
" for(int i=0;i!=2;++i)"
" {"
" geomPosition = vec4("
" gl_in[0].gl_Position.xyz+"
" ViewX * xo[i] * LightVolSize+"
" ViewY * yo[j] * LightVolSize+"
" ViewZ * zo * LightVolSize,"
" 1.0"
" );"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" geomPosition;"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
light_gs.Compile();
light_fs.Source(
"#version 330\n"
"in vec4 geomPosition;"
"out vec4 fragColor;"
"uniform samplerCubeShadow ShadowMap;"
"uniform int SampleCount;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" vec3 LightDir = geomPosition.xyz - LightPos;"
" vec4 ShadowCoord = vec4("
" normalize(LightDir),"
" length(LightDir)"
" );"
" float s = texture(ShadowMap, ShadowCoord);"
" float alpha = s / (SampleCount * pow(length(LightDir), 2));"
" fragColor = vec4(1.0, 1.0, 1.0, alpha);"
"}"
);
light_fs.Compile();
light_prog.AttachShader(light_vs);
light_prog.AttachShader(light_gs);
light_prog.AttachShader(light_fs);
light_prog.Link();
light_prog.Use();
// bind the VAO for the light volume
light.Bind();
// bind the VBO for the light volume plane positions
light_positions.Bind(Buffer::Target::Array);
{
GLfloat position[3] = {0.0, 0.0, 0.0};
Buffer::Data(Buffer::Target::Array, 3, position);
VertexAttribArray attr(light_prog, "Position");
attr.Setup(3, DataType::Float);
attr.Enable();
}
Uniform<GLint>(light_prog, "SampleCount").Set(sample_count);
Uniform<GLfloat>(light_prog, "LightVolSize").Set(4);
UniformSampler(light_prog, "ShadowMap").Set(0);
// Setup the texture and the offscreen FBO
Texture::Active(0);
{
auto bound_tex = Bind(depth_tex, Texture::Target::CubeMap);
bound_tex.MinFilter(TextureMinFilter::Linear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::ClampToEdge);
bound_tex.WrapT(TextureWrap::ClampToEdge);
bound_tex.WrapR(TextureWrap::ClampToEdge);
bound_tex.CompareFunc(CompareFunction::LEqual);
bound_tex.CompareMode(
TextureCompareMode::CompareRefToTexture
);
for(int i=0; i!=6; ++i)
{
Texture::Image2D(
Texture::CubeMapFace(i),
0,
PixelDataInternalFormat::DepthComponent,
tex_side, tex_side,
0,
PixelDataFormat::DepthComponent,
PixelDataType::Float,
nullptr
);
}
auto bound_fbo = Bind(
depth_fbo,
Framebuffer::Target::Draw
);
bound_fbo.AttachTexture(
FramebufferAttachment::Depth,
depth_tex,
0
);
}
//
gl.ClearColor(0.2f, 0.05f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_shape.FaceWinding());
gl.CullFace(Face::Back);
gl.BlendFunc(BlendFunction::SrcAlpha, BlendFunction::One);
}
PoolTilesExample()
: make_plane(
Vec3f(), Vec3f(7.0f, 0.0f, 0.0f), Vec3f(0.0f, 0.0f, -7.0f), 48, 48)
, plane_instr(make_plane.Instructions())
, plane_indices(make_plane.Indices())
, make_shape()
, shape_instr(make_shape.Instructions())
, shape_indices(make_shape.Indices())
, plane_vs(ObjectDesc("Plane vertex"))
, shape_vs(ObjectDesc("Shape vertex"))
, plane_fs(ObjectDesc("Plane fragment"))
, shape_fs(ObjectDesc("Shape fragment"))
, plane_camera_matrix(plane_prog, "CameraMatrix")
, shape_camera_matrix(shape_prog, "CameraMatrix")
, plane_camera_position(plane_prog, "CameraPosition")
, width(800)
, height(600)
, refl_tex_side(width > height ? height : width)
, tile_tex_side(64) {
gl.RequireAtLeast(LimitQuery::MaxCombinedTextureImageUnits, 5);
plane_vs.Source(
"#version 140\n"
"uniform vec3 LightPosition;"
"uniform vec3 CameraPosition;"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec2 TexCoord;"
"out vec3 vertLightDir;"
"out vec3 vertViewDir;"
"out vec4 vertReflTexCoord;"
"out vec2 vertTileTexCoord;"
"void main()"
"{"
" gl_Position = ModelMatrix* Position;"
" vertLightDir = normalize(LightPosition - gl_Position.xyz);"
" vertViewDir = normalize(CameraPosition - gl_Position.xyz);"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
" vertReflTexCoord = gl_Position;"
" vertTileTexCoord = TexCoord;"
"}");
plane_vs.Compile();
plane_fs.Source(
"#version 140\n"
"uniform sampler2D RandTex, PictTex, TileTex, NormTex;"
"uniform sampler2D ReflectTex;"
"uniform uint TileCount;"
"uniform float Aspect;"
"in vec3 vertLightDir;"
"in vec3 vertViewDir;"
"in vec4 vertReflTexCoord;"
"in vec2 vertTileTexCoord;"
"out vec4 fragColor;"
"void main()"
"{"
" vec3 Normal = texture("
" NormTex, "
" vertTileTexCoord * TileCount"
" ).rgb;"
" vec3 LightRefl = reflect("
" -normalize(vertLightDir),"
" normalize(Normal)"
" );"
" float Diffuse = max(dot("
" Normal, "
" vertLightDir"
" ), 0.0);"
" float Specular = max(dot("
" LightRefl,"
" vertViewDir"
" ), 0.0);"
" float PlasterLight = 0.3 + max(Diffuse, 0.0);"
" float TileLight = 0.3 + pow(Diffuse, 2.0)*0.9 + pow(Specular, "
"4.0)*2.5;"
" vec2 ReflCoord = vertReflTexCoord.xy;"
" ReflCoord /= vertReflTexCoord.w;"
" ReflCoord *= 0.5;"
" ReflCoord += vec2(Aspect*0.5, 0.5);"
" ReflCoord += vec2(Normal.x, Normal.z)*0.5;"
" vec3 ReflColor = texture("
" ReflectTex, "
" ReflCoord"
" ).rgb;"
" vec3 TileProps = texture("
" TileTex, "
" vertTileTexCoord * TileCount"
" ).rgb;"
" float Pict = texture(PictTex, vertTileTexCoord).r;"
" float Rand = texture(RandTex, vertTileTexCoord).r;"
" float LightVsDark = "
" mix( 0.1, 0.9, Pict)+"
" mix(-0.1, 0.1, Rand);"
" vec3 TileColor = mix("
" vec3(0.1, 0.1, 0.5),"
" vec3(0.4, 0.4, 0.9),"
" LightVsDark "
" );"
" vec3 PlasterColor = vec3(0.9, 0.9, 0.9);"
" fragColor = vec4("
" mix("
" PlasterColor * PlasterLight,"
" TileColor * TileLight, "
" TileProps.b"
" ) +"
" ReflColor * TileProps.g * 0.6,"
" 1.0"
" );"
"}");
plane_fs.Compile();
plane_prog.AttachShader(plane_vs);
plane_prog.AttachShader(plane_fs);
plane_prog.Link();
plane_prog.Use();
Vec3f lightPos(3.0f, 2.5f, 2.0f);
Uniform<Vec3f>(plane_prog, "LightPosition").Set(lightPos);
Uniform<GLuint>(plane_prog, "TileCount").Set(tile_tex_side);
Uniform<Mat4f>(plane_prog, "ModelMatrix")
.Set(ModelMatrixf::Translation(0.0f, -0.5f, 0.0f));
std::vector<GLfloat> data;
GLuint n_per_vertex;
n_per_vertex = make_plane.Positions(data);
plane_verts.Data(data);
DSAVertexArrayAttribEXT(plane, plane_prog, "Position")
.Setup<GLfloat>(plane_verts, n_per_vertex)
.Enable();
n_per_vertex = make_plane.TexCoordinates(data);
plane_texcoords.Data(data);
DSAVertexArrayAttribEXT(plane, plane_prog, "TexCoord")
.Setup<GLfloat>(plane_texcoords, n_per_vertex)
.Enable();
//
rand_tex.target = Texture::Target::_2D;
rand_tex.Image2D(images::RandomRedUByte(tile_tex_side, tile_tex_side));
rand_tex.Filter(TextureFilter::Nearest);
rand_tex.Wrap(TextureWrap::Repeat);
Texture::Active(0);
UniformSampler(plane_prog, "RandTex").Set(0);
rand_tex.Bind();
//
pict_tex.target = Texture::Target::_2D;
pict_tex.Image2D(images::LoadTexture("pool_pictogram"));
pict_tex.Filter(TextureFilter::Linear);
pict_tex.Wrap(TextureWrap::Repeat);
Texture::Active(1);
UniformSampler(plane_prog, "PictTex").Set(1);
pict_tex.Bind();
//
auto tile_image = images::LoadTexture("small_tile");
//
tile_tex.target = Texture::Target::_2D;
tile_tex.Image2D(tile_image);
tile_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
tile_tex.MagFilter(TextureMagFilter::Linear);
tile_tex.Wrap(TextureWrap::Repeat);
tile_tex.GenerateMipmap();
Texture::Active(2);
UniformSampler(plane_prog, "TileTex").Set(2);
tile_tex.Bind();
//
norm_tex.target = Texture::Target::_2D;
norm_tex.Image2D(images::TransformComponents<GLfloat, 3>(
images::NormalMap(tile_image),
Mat4d(
Vec4d(1.0, 0.0, 0.0, 0.0),
Vec4d(0.0, 0.0, 1.0, 0.0),
Vec4d(0.0, -1.0, 0.0, 0.0),
Vec4d(0.0, 0.0, 0.0, 1.0))));
norm_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
norm_tex.MagFilter(TextureMagFilter::Linear);
norm_tex.Wrap(TextureWrap::Repeat);
norm_tex.GenerateMipmap();
Texture::Active(3);
UniformSampler(plane_prog, "NormTex").Set(3);
norm_tex.Bind();
//
reflect_tex.target = Texture::Target::_2D;
reflect_tex.Image2D(
0,
PixelDataInternalFormat::RGB,
refl_tex_side,
refl_tex_side,
0,
PixelDataFormat::RGB,
PixelDataType::UnsignedByte,
nullptr);
reflect_tex.Filter(TextureFilter::Linear);
reflect_tex.Wrap(TextureWrap::ClampToEdge);
Texture::Active(4);
UniformSampler(plane_prog, "ReflectTex").Set(4);
reflect_tex.Bind();
rbo.Storage(
PixelDataInternalFormat::DepthComponent,
refl_tex_side,
refl_tex_side);
fbo.target = Framebuffer::Target::Draw;
fbo.AttachTexture(FramebufferAttachment::Color, reflect_tex, 0);
fbo.AttachRenderbuffer(FramebufferAttachment::Depth, rbo);
shape_vs.Source(
"#version 140\n"
"uniform vec3 LightPosition;"
"uniform mat4 ProjectionMatrix, ModelMatrix, CameraMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal;"
"out vec3 vertLightDir;"
"out vec3 vertLightRefl;"
"out vec3 vertViewDir;"
"out vec3 vertViewRefl;"
"out vec3 vertColor;"
"void main()"
"{"
" gl_Position = "
" ModelMatrix *"
" Position;"
" vertLightDir = LightPosition - gl_Position.xyz;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLightRefl = reflect("
" -normalize(vertLightDir),"
" normalize(vertNormal)"
" );"
" vertViewDir = ("
" vec4(0.0, 0.0, 1.0, 1.0)*"
" CameraMatrix"
" ).xyz;"
" vertViewRefl = reflect("
" -normalize(vertViewDir),"
" normalize(vertNormal)"
" );"
" vertColor = vec3(0.3, 0.3, 0.7);"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" gl_Position;"
"}");
shape_vs.Compile();
shape_fs.Source(
"#version 140\n"
"uniform sampler2D PictTex, TileTex;"
"uniform uint TileCount;"
"in vec3 vertNormal;"
"in vec3 vertLightDir;"
"in vec3 vertLightRefl;"
"in vec3 vertViewDir;"
"in vec3 vertViewRefl;"
"in vec3 vertColor;"
"out vec4 fragColor;"
"void main()"
"{"
" float LtDist = length(vertLightDir);"
" float Diffuse = dot("
" normalize(vertNormal), "
" normalize(vertLightDir)"
" ) / LtDist;"
" float Specular = dot("
" normalize(vertLightRefl),"
" normalize(vertViewDir)"
" );"
" vec3 LightColor = vec3(1.0, 1.0, 1.0);"
" vec2 ReflTexCoord = -vec2("
" vertViewRefl.x,"
" vertViewRefl.z "
" );"
" ReflTexCoord *= 0.25;"
" ReflTexCoord += vec2(0.5, 0.5);"
" float Pict = texture(PictTex, ReflTexCoord).r;"
" float LightVsDark = mix( 0.1, 0.9, Pict);"
" vec3 TileColor = mix("
" vec3(0.2, 0.2, 0.6),"
" vec3(0.5, 0.5, 0.9),"
" LightVsDark"
" );"
" vec3 PlasterColor = vec3(0.7, 0.7, 0.7);"
" vec3 FloorColor = mix("
" PlasterColor, "
" TileColor, "
" texture(TileTex, ReflTexCoord*TileCount).b"
" );"
" vec3 ReflColor = mix("
" vec3(0.5, 0.5, 0.4), "
" FloorColor, "
" pow(max((-vertViewRefl.y-0.5)*2.0, 0.0), 2.0)"
" );"
" fragColor = vec4("
" vertColor * 0.4 + "
" ReflColor * 0.3 + "
" (LightColor + vertColor)*pow(max(2.5*Diffuse, 0.0), 3) + "
" LightColor * pow(max(Specular, 0.0), 64), "
" 1.0"
" );"
"}");
shape_fs.Compile();
shape_prog.AttachShader(shape_vs);
shape_prog.AttachShader(shape_fs);
shape_prog.Link();
shape_prog.Use();
Uniform<Vec3f>(shape_prog, "LightPosition").Set(lightPos);
Uniform<Mat4f>(shape_prog, "ModelMatrix")
.Set(ModelMatrixf::Translation(0.0f, 0.6f, 0.0f));
UniformSampler(shape_prog, "PictTex").Set(0);
UniformSampler(shape_prog, "TileTex").Set(1);
Uniform<GLuint>(shape_prog, "TileCount").Set(tile_tex_side);
n_per_vertex = make_shape.Positions(data);
shape_verts.Data(data);
DSAVertexArrayAttribEXT(shape, shape_prog, "Position")
.Setup<GLfloat>(shape_verts, n_per_vertex)
.Enable();
n_per_vertex = make_shape.Normals(data);
shape_normals.Data(data);
DSAVertexArrayAttribEXT(shape, shape_prog, "Normal")
.Setup<GLfloat>(shape_normals, n_per_vertex)
.Enable();
//
gl.ClearColor(0.5f, 0.5f, 0.4f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
TessellationExample(void)
: shape_instr(make_shape.Instructions(PrimitiveType::Patches))
, shape_indices(make_shape.Indices())
, vs(ObjectDesc("Vertex"))
, cs(ObjectDesc("Tessellation Control"))
, es(ObjectDesc("Tessellation Evaluation"))
, gs(ObjectDesc("Geometry"))
, fs(ObjectDesc("Fragment"))
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
, offset(prog, "Offset")
, view_position(prog, "ViewPosition")
, viewport_dimensions(prog, "ViewportDimensions")
{
vs.Source(
"#version 410\n"
"uniform vec3 ViewPosition;"
"in vec3 Position;"
"out vec3 vertPosition;"
"out float vertDistance;"
"void main(void)"
"{"
" vertPosition = Position;"
" vertDistance = length(ViewPosition - vertPosition);"
"}"
);
vs.Compile();
cs.Source(
"#version 410\n"
"layout(vertices = 3) out;"
"in vec3 vertPosition[];"
"in float vertDistance[];"
"out vec3 tecoPosition[];"
"int tessLevel(float dist)"
"{"
" return int(9.0 / sqrt(dist+0.1));"
"}"
"void main(void)"
"{"
" tecoPosition[gl_InvocationID] ="
" vertPosition[gl_InvocationID];"
" if(gl_InvocationID == 0)"
" {"
" gl_TessLevelInner[0] = tessLevel(("
" vertDistance[0]+"
" vertDistance[1]+"
" vertDistance[2] "
" )*0.333);"
" gl_TessLevelOuter[0] = tessLevel(("
" vertDistance[1]+"
" vertDistance[2] "
" )*0.5);"
" gl_TessLevelOuter[1] = tessLevel(("
" vertDistance[2]+"
" vertDistance[0] "
" )*0.5);"
" gl_TessLevelOuter[2] = tessLevel(("
" vertDistance[0]+"
" vertDistance[1] "
" )*0.5);"
" }"
"}"
);
cs.Compile();
es.Source(
"#version 410\n"
"layout(triangles, equal_spacing, ccw) in;"
"const vec3 LightPosition = vec3(12.0, 10.0, 7.0);"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec3 tecoPosition[];"
"out vec3 teevNormal;"
"out vec3 teevLightDir;"
"void main(void)"
"{"
" vec3 p0 = gl_TessCoord.x * tecoPosition[0];"
" vec3 p1 = gl_TessCoord.y * tecoPosition[1];"
" vec3 p2 = gl_TessCoord.z * tecoPosition[2];"
" vec4 tempPosition = vec4(normalize(p0+p1+p2), 0.0);"
" teevNormal = (ModelMatrix * tempPosition).xyz;"
" tempPosition.w = 1.0;"
" tempPosition = ModelMatrix * tempPosition;"
" teevLightDir = LightPosition - tempPosition.xyz;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" tempPosition;"
"}"
);
es.Compile();
gs.Source(
"#version 410\n"
"layout (triangles) in;"
"layout (triangle_strip, max_vertices = 3) out;"
"uniform vec3 Offset;"
"uniform vec2 ViewportDimensions;"
"in vec3 teevNormal[], teevLightDir[];"
"noperspective out vec3 geomDist;"
"flat out vec3 geomNormal;"
"out vec3 geomColor;"
"out vec3 geomLightDir;"
"void main(void)"
"{"
" geomNormal = normalize("
" teevNormal[0]+"
" teevNormal[1]+"
" teevNormal[2]"
" );"
" vec2 ScreenPos[3];"
" for(int i=0; i!=3; ++i)"
" {"
" ScreenPos[i] = "
" ViewportDimensions*"
" gl_in[i].gl_Position.xy/"
" gl_in[i].gl_Position.w;"
" }"
" vec2 TmpVect[3];"
" for(int i=0; i!=3; ++i)"
" {"
" TmpVect[i] = "
" ScreenPos[(i+2)%3]-"
" ScreenPos[(i+1)%3];"
" }"
" const vec3 EdgeMask[3] = vec3[3]("
" vec3(1.0, 0.0, 0.0),"
" vec3(0.0, 1.0, 0.0),"
" vec3(0.0, 0.0, 1.0) "
" );"
" for(int i=0; i!=3; ++i)"
" {"
" float Dist = abs("
" TmpVect[(i+1)%3].x*TmpVect[(i+2)%3].y-"
" TmpVect[(i+1)%3].y*TmpVect[(i+2)%3].x "
" ) / length(TmpVect[i]);"
" vec3 DistVect = vec3(Dist, Dist, Dist);"
" gl_Position = gl_in[i].gl_Position;"
" geomColor = normalize(abs("
" vec3(2.0, 2.0, 2.0)-"
" teevNormal[i]-"
" Offset"
" ));"
" geomLightDir = teevLightDir[i];"
" geomDist = EdgeMask[i] * DistVect;"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
gs.Compile();
fs.Source(
"#version 410\n"
"noperspective in vec3 geomDist;"
"flat in vec3 geomNormal;"
"in vec3 geomColor;"
"in vec3 geomLightDir;"
"out vec3 fragColor;"
"void main(void)"
"{"
" float MinDist = min(min(geomDist.x,geomDist.y),geomDist.z);"
" float EdgeAlpha = exp2(-pow(MinDist, 2.0));"
" const float Ambient = 0.8;"
" float Diffuse = max(dot("
" normalize(geomNormal),"
" normalize(geomLightDir)"
" ), 0.0);"
" vec3 FaceColor = geomColor * (Diffuse + Ambient);"
" const vec3 EdgeColor = vec3(0.0, 0.0, 0.0);"
" fragColor = mix(FaceColor, EdgeColor, EdgeAlpha);"
"}"
);
fs.Compile();
prog.AttachShader(vs);
prog.AttachShader(cs);
prog.AttachShader(es);
prog.AttachShader(gs);
prog.AttachShader(fs);
prog.Link();
prog.Use();
shape.Bind();
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "Position");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
indices.Bind(Buffer::Target::ElementArray);
Buffer::Data(Buffer::Target::ElementArray, shape_indices);
shape_indices.clear();
}
//
gl.ClearColor(0.8f, 0.8f, 0.8f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
prog.Use();
}
TorusExample(void)
: make_torus(1.0, 0.5, 72, 48)
, torus_instr(make_torus.Instructions())
, torus_indices(make_torus.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
{
// Set the vertex shader source and compile it
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"in vec2 TexCoord;"
"out vec3 vertNormal;"
"out vec3 vertLight;"
"out vec2 vertTexCoord;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLight = LightPos - gl_Position.xyz;"
" vertTexCoord = TexCoord;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
).Compile();
// set the fragment shader source and compile it
fs.Source(
"#version 330\n"
"uniform sampler2D TexUnit;"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = sqrt(length(vertLight));"
" float d = l > 0? dot("
" vertNormal, "
" normalize(vertLight)"
" ) / l : 0.0;"
" float i = 0.2 + 3.2*max(d, 0.0);"
" fragColor = texture(TexUnit, vertTexCoord)*i;"
"}"
).Compile();
// attach the shaders to the program
prog.AttachShader(vs).AttachShader(fs);
// link and use it
prog.Link().Use();
// bind the VAO for the torus
torus.Bind();
// bind the VBO for the torus vertices
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Positions(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
VertexAttribArray attr(prog, "Position");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
// bind the VBO for the torus normals
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Normals(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
VertexAttribArray attr(prog, "Normal");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
// bind the VBO for the torus texture coordinates
texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.TexCoordinates(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
VertexAttribArray attr(prog, "TexCoord");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
// setup the texture
Texture::Target tex_tgt = Texture::Target::_2D;
tex.Bind(tex_tgt);
{
GLuint s = 256;
std::vector<GLubyte> tex_data(s*s);
for(GLuint v=0;v!=s;++v)
for(GLuint u=0;u!=s;++u)
tex_data[v*s+u] = rand() % 0x100;
Texture::Image2D(
tex_tgt,
0,
PixelDataInternalFormat::Red,
s, s,
0,
PixelDataFormat::Red,
PixelDataType::UnsignedByte,
tex_data.data()
);
Texture::MinFilter(tex_tgt, TextureMinFilter::Linear);
Texture::MagFilter(tex_tgt, TextureMagFilter::Linear);
Texture::WrapS(tex_tgt, TextureWrap::Repeat);
Texture::WrapT(tex_tgt, TextureWrap::Repeat);
Texture::SwizzleG(tex_tgt, TextureSwizzle::Red);
Texture::SwizzleB(tex_tgt, TextureSwizzle::Red);
}
// typechecked uniform with exact data type
// on compilers supporting strongly typed enums
// you can use:
//Typechecked<Uniform<SLtoCpp<SLDataType::Sampler2D>>>(prog, "TexUnit").Set(0);
// without strongly typed enums you need to do:
typedef SLtoCpp<OGLPLUS_CONST_ENUM_VALUE(SLDataType::Sampler2D)> GLSLsampler2D;
Typechecked<Uniform<GLSLsampler2D>>(prog, "TexUnit").Set(0);
//
Uniform<Vec3f>(prog, "LightPos").Set(4.0f, 4.0f, -8.0f);
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_torus.FaceWinding());
gl.CullFace(Face::Back);
}
SphereExample(void)
: sphere_instr(make_sphere.Instructions())
, sphere_indices(make_sphere.Indices())
, hole_count(50)
, hole_diameter(0.30f)
{
// This shader will be used in transform fedback mode
// to transform the vertices used to "cut out the holes"
// the same way the sphere is transformed
vs_tfb.Source(
"#version 330\n"
"uniform mat4 CameraMatrix, ModelMatrix;"
"uniform float Diameter;"
"in vec3 Hole;"
"out vec3 vertTransfHole;"
"void main(void)"
"{"
" vertTransfHole = ("
" CameraMatrix *"
" ModelMatrix *"
" vec4(Hole * (1.0 + 0.5 * Diameter), 0.0)"
" ).xyz;"
"}"
);
// compile, setup transform feedback output variables
// link and use the program
vs_tfb.Compile();
prog_tfb.AttachShader(vs_tfb);
const GLchar* var_name = "vertTransfHole";
prog_tfb.TransformFeedbackVaryings(
1, &var_name,
TransformFeedbackMode::InterleavedAttribs
);
prog_tfb.Link();
prog_tfb.Use();
Uniform<GLfloat> diameter(prog_tfb, "Diameter");
diameter.Set(hole_diameter);
// bind the VAO for the holes
holes.Bind();
// bind the VBO for the hole vertices
hole_verts.Bind(Buffer::Target::Array);
// and the VBO for the transformed hole vertices captured by tfb
transf_hole_verts.Bind(Buffer::Target::TransformFeedback);
{
std::vector<GLfloat> data;
make_hole_data(data, hole_count);
Buffer::Data(Buffer::Target::TransformFeedback, data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(prog_tfb, "Hole");
attr.Setup<Vec3f>();
attr.Enable();
}
transf_hole_verts.BindBase(
Buffer::IndexedTarget::TransformFeedback,
0
);
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal;"
"out vec3 vertLight;"
"const vec3 LightPos = vec3(2.0, 3.0, 3.0);"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLight = LightPos-gl_Position.xyz;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"out vec4 fragColor;"
"const int HoleCount = 50;"
"uniform vec3 TransfHole[50];"
"uniform float Diameter;"
"void main(void)"
"{"
" int imax = 0;"
" float dmax = -1.0;"
" for(int i=0; i!=HoleCount; ++i)"
" {"
" float d = dot(vertNormal, TransfHole[i]);"
" if(dmax < d)"
" {"
" dmax = d;"
" imax = i;"
" }"
" }"
" float l = length(vertLight);"
" vec3 FragDiff = TransfHole[imax] - vertNormal;"
" vec3 FinalNormal = "
" length(FragDiff) > Diameter?"
" vertNormal:"
" normalize(FragDiff+vertNormal*Diameter);"
" float i = (l > 0.0) ? dot("
" FinalNormal, "
" normalize(vertLight)"
" ) / l : 0.0;"
" i = 0.2+max(i*2.5, 0.0);"
" fragColor = vec4(i, i, i, 1.0);"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
diameter.Set(hole_diameter);
// bind the VAO for the sphere
sphere.Bind();
// bind the VBO for the sphere vertices
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_sphere.Positions(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
VertexArrayAttrib attr(prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// bind the VBO for the sphere normals
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_sphere.Normals(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
VertexArrayAttrib attr(prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
CubeMapExample(void)
: shape_instr(make_shape.Instructions())
, shape_indices(make_shape.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"in vec2 TexCoord;"
"out vec3 vertNormal;"
"out vec3 vertLightDir;"
"out vec3 vertLightRefl;"
"out vec3 vertViewDir;"
"out vec3 vertViewRefl;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLightDir = LightPos - gl_Position.xyz;"
" vertLightRefl = reflect("
" -normalize(vertLightDir),"
" normalize(vertNormal)"
" );"
" vertViewDir = ("
" vec4(0.0, 0.0, 1.0, 1.0)*"
" CameraMatrix"
" ).xyz;"
" vertViewRefl = reflect("
" normalize(vertViewDir),"
" normalize(vertNormal)"
" );"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"uniform samplerCube TexUnit;"
"in vec3 vertNormal;"
"in vec3 vertLightDir;"
"in vec3 vertLightRefl;"
"in vec3 vertViewDir;"
"in vec3 vertViewRefl;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = length(vertLightDir);"
" float d = dot("
" normalize(vertNormal), "
" normalize(vertLightDir)"
" ) / l;"
" float s = dot("
" normalize(vertLightRefl),"
" normalize(vertViewDir)"
" );"
" vec3 lt = vec3(1.0, 1.0, 1.0);"
" vec3 env = texture(TexUnit, vertViewRefl).rgb;"
" fragColor = vec4("
" env * 0.4 + "
" (lt + env) * 1.5 * max(d, 0.0) + "
" lt * pow(max(s, 0.0), 64), "
" 1.0"
" );"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the shape
shape.Bind();
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// setup the texture
{
GLuint tex_side = 256;
auto image = images::NewtonFractal(
tex_side, tex_side,
Vec3f(0.3f, 0.1f, 0.2f),
Vec3f(1.0f, 0.8f, 0.9f),
Vec2f(-1.0f, -1.0f),
Vec2f( 1.0f, 1.0f),
images::NewtonFractal::X4Minus1(),
images::NewtonFractal::DefaultMixer()
);
auto tex_target = Texture::Target::CubeMap;
// texture syntax sugar
tex << tex_target;
tex_target << TextureMinFilter::Linear;
tex_target << TextureMagFilter::Linear;
tex_target << TextureWrap::ClampToEdge;
for(int i=0; i!=6; ++i)
{
Texture::CubeMapFace(i) << image;
}
}
// typechecked uniform with the exact sampler type
// on compilers supporting strongly typed enums
// you can use:
//Typechecked<Uniform<SLtoCpp<SLDataType::SamplerCube>>>(prog, "TexUnit").Set(0);
// without strongly typed enums you need to do:
typedef SLtoCpp<OGLPLUS_CONST_ENUM_VALUE(SLDataType::SamplerCube)> GLSLsamplerCube;
Typechecked<Uniform<GLSLsamplerCube>>(prog, "TexUnit").Set(0);
//
Uniform<Vec3f>(prog, "LightPos").Set(Vec3f(3.0f, 5.0f, 4.0f));
//
gl.ClearColor(0.2f, 0.05f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_shape.FaceWinding());
gl.CullFace(Face::Back);
}
TorusExample(void)
: make_torus(1.0, 0.5, 72, 48)
, torus_instr(make_torus.Instructions())
, torus_indices(make_torus.Indices())
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal;"
"out vec3 vertViewDir;"
"void main(void)"
"{"
" vertNormal = Normal;"
" vertViewDir = ("
" vec4(0.0, 0.0, 1.0, 1.0)*"
" CameraMatrix"
" ).xyz;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" Position;"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"in vec3 vertNormal;"
"in vec3 vertViewDir;"
"out vec4 fragColor;"
"uniform vec3 LightPos[3];"
"void main(void)"
"{"
" float amb = 0.2;"
" float diff = 0.0;"
" float spec = 0.0;"
" for(int i=0;i!=3;++i)"
" {"
" diff += max("
" dot(vertNormal, LightPos[i])/"
" dot(LightPos[i], LightPos[i]),"
" 0.0"
" );"
" float k = dot(vertNormal, LightPos[i]);"
" vec3 r = 2.0*k*vertNormal - LightPos[i];"
" spec += pow(max("
" dot(normalize(r), vertViewDir),"
" 0.0"
" ), 32.0 * dot(r, r));"
" }"
" fragColor = "
" vec4(1.0, 0.1, 0.3, 1.0)*(amb+diff)+"
" vec4(1.0, 1.0, 1.0, 1.0)*spec;"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the torus
torus.Bind();
// bind the VBO for the torus vertices
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Positions(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
VertexAttribArray attr(prog, "Position");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
// bind the VBO for the torus normals
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Normals(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
VertexAttribArray attr(prog, "Normal");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
// set the light positions
Uniform<Vec3f> light_pos(prog, "LightPos");
light_pos[0].Set(Vec3f(2.0f,-1.0f, 0.0f));
light_pos[1].Set(Vec3f(0.0f, 3.0f, 0.0f));
light_pos[2].Set(Vec3f(0.0f,-1.0f, 4.0f));
//
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_torus.FaceWinding());
gl.CullFace(Face::Back);
}
static Program make(void)
{
Program result;
VertexShader vs;
vs.Source(
"#version 330\n"
"#define side 128\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, LightProjMatrix, LightMatrix;"
"uniform vec3 CameraPos, LightPos;"
"uniform float Fade;"
"uniform sampler2D Offsets;"
"uniform sampler2D Heights;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec4 vertShadowCoord;"
"out vec3 vertViewDir;"
"out vec3 vertLightDir;"
"out vec3 vertNormal;"
"out float vertLight;"
"void main(void)"
"{"
" ivec2 Coord = ivec2(gl_InstanceID%side, gl_InstanceID/side);"
" vec2 Offs = texelFetch(Offsets, Coord, 0).xy;"
" float Depth = texelFetch(Heights, Coord, 0).r;"
" float Height = 1.0-Depth;"
" gl_Position = Position;"
" gl_Position.xz += Offs;"
" float l = (1.0-dot(Normal, vec3(0,1,0))*0.5)*0.8;"
" vertLight = (1.0-gl_Position.y*l)*sign(Height)*Fade;"
" gl_Position.y *= max(Height*Fade*side/2, 0.5);"
" vertViewDir = CameraPos - gl_Position.xyz;"
" vertLightDir = LightPos - gl_Position.xyz;"
" vertShadowCoord = LightProjMatrix * LightMatrix * gl_Position;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
" vertNormal = Normal;"
"}"
).Compile();
FragmentShader fs;
fs.Source(
"#version 330\n"
"uniform sampler2DShadow Shadows;"
"const vec3 LightDir = normalize(vec3(1, 0.3, 1));"
"const vec3 BarColor = vec3(0.4, 0.4, 0.4);"
"in vec4 vertShadowCoord;"
"in vec3 vertViewDir;"
"in vec3 vertLightDir;"
"in vec3 vertNormal;"
"in float vertLight;"
"out vec3 fragColor;"
"void main(void)"
"{"
" vec3 Normal = normalize(vertNormal);"
" vec3 ViewDir = normalize(vertViewDir);"
" vec3 LightDir = normalize(vertLightDir);"
" vec3 LightRefl = reflect(-LightDir, Normal);"
" vec3 ShadowCoord = (vertShadowCoord.xyz/vertShadowCoord.w)*0.5 + 0.5;"
" float shdw = texture(Shadows, ShadowCoord);"
" float ambi = 0.15;"
" float diff = pow(max(dot(Normal, LightDir)+0.1, 0.0),2.0)*0.9;"
" float spec = pow(max(dot(ViewDir, LightRefl), 0.0), 32.0)*0.4;"
" float emis = pow(vertLight, 2.0)*0.7;"
" fragColor = "
" BarColor * (diff*shdw+ambi)+"
" vec3(1.0, 1.0, 1.0)*spec*shdw+"
" vec3(0.1, 1.0, 0.3)*emis;"
"}"
).Compile();
result.AttachShader(vs).AttachShader(fs);
result.Link().Validate().Use();
return std::move(result);
}
static Program make() {
Shader vs(ShaderType::Vertex);
vs.Source(
"#version 140\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"uniform vec3 LightPos;"
"in vec4 Position;"
"in vec3 Normal;"
"in vec3 Tangent;"
"in vec2 TexCoord;"
"out vec3 vertEye;"
"out vec3 vertLight;"
"out vec3 vertNormal;"
"out vec2 vertTexCoord;"
"out vec3 vertViewTangent;"
"out mat3 NormalMatrix;"
"void main()"
"{"
" vec4 EyePos = "
" CameraMatrix *"
" ModelMatrix *"
" Position;"
" vertEye = EyePos.xyz;"
" vec3 fragTangent = ("
" CameraMatrix *"
" ModelMatrix *"
" vec4(Tangent, 0.0)"
" ).xyz;"
" vertNormal = ("
" CameraMatrix *"
" ModelMatrix *"
" vec4(Normal, 0.0)"
" ).xyz;"
" vertLight = ("
" CameraMatrix *"
" vec4(LightPos-vertEye, 1.0)"
" ).xyz;"
" NormalMatrix = mat3("
" fragTangent,"
" cross(vertNormal, fragTangent),"
" vertNormal"
" );"
" vertViewTangent = vec3("
" dot(NormalMatrix[0], vertEye),"
" dot(NormalMatrix[1], vertEye),"
" dot(NormalMatrix[2], vertEye) "
" );"
" vertTexCoord = TexCoord;"
" gl_Position = ProjectionMatrix *"
" EyePos;"
"}")
.Compile();
Shader fs(ShaderType::Fragment);
fs.Source(
"#version 140\n"
"uniform sampler2D BumpTex;"
"uniform int BumpTexWidth;"
"uniform int BumpTexHeight;"
"float DepthMult = 0.1;"
"in vec3 vertEye;"
"in vec3 vertLight;"
"in vec3 vertNormal;"
"in vec2 vertTexCoord;"
"in vec3 vertViewTangent;"
"in mat3 NormalMatrix;"
"out vec4 fragColor;"
"void main()"
"{"
" vec3 ViewTangent = normalize(vertViewTangent);"
" float perp = -dot(normalize(vertEye), vertNormal);"
" float sampleInterval = 1.0/length("
" vec2(BumpTexWidth, BumpTexHeight)"
" );"
" vec3 sampleStep = ViewTangent*sampleInterval;"
" float prevD = 0.0;"
" float depth = texture(BumpTex, vertTexCoord).w;"
" float maxOffs = min((depth*DepthMult)/(-ViewTangent.z), 1.0);"
" vec3 viewOffs = vec3(0.0, 0.0, 0.0);"
" vec2 offsTexC = vertTexCoord + viewOffs.xy;"
" while(length(viewOffs) < maxOffs)"
" {"
" if(offsTexC.x <= 0.0 || offsTexC.x >= 1.0)"
" break;"
" if(offsTexC.y <= 0.0 || offsTexC.y >= 1.0)"
" break;"
" if(depth*DepthMult*perp <= -viewOffs.z)"
" break;"
" viewOffs += sampleStep;"
" offsTexC = vertTexCoord + viewOffs.xy;"
" prevD = depth;"
" depth = texture(BumpTex, offsTexC).w;"
" }"
" offsTexC = vec2("
" clamp(offsTexC.x, 0.0, 1.0),"
" clamp(offsTexC.y, 0.0, 1.0) "
" );"
" float b = ("
" 1 +"
" int(offsTexC.x*16) % 2+"
" int(offsTexC.y*16) % 2"
" ) % 2;"
" vec3 c = vec3(b, b, b);"
" vec3 n = texture(BumpTex, offsTexC).xyz;"
" vec3 finalNormal = NormalMatrix * n;"
" float l = length(vertLight);"
" float d = (l > 0.0) ? dot("
" normalize(vertLight), "
" finalNormal"
" ) / l : 0.0;"
" float i = 0.1 + 2.5*max(d, 0.0);"
" fragColor = vec4(c*i, 1.0);"
"}")
.Compile();
Program prog;
prog.AttachShader(vs).AttachShader(fs);
prog.Link();
prog.Use();
return prog;
}
static Program make_prog() {
Program prog;
VertexShader vs;
vs.Source(StrCRef("#version 150\n"
"in vec3 Position;"
"in vec2 TexCoord;"
"out vec2 vertTexCoord;"
"void main()"
"{"
" gl_Position = vec4(Position, 1.0);"
" vertTexCoord = TexCoord;"
"}"))
.Compile();
prog.AttachShader(vs);
GeometryShader gs;
gs
.Source(StrCRef(
"#version 150\n"
"#extension GL_ARB_gpu_shader5 : enable\n"
"layout(triangles, invocations = 7) in;"
"layout(triangle_strip, max_vertices = 21) out;"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"mat4 Matrix = ProjectionMatrix * CameraMatrix;"
"uniform vec3 CameraPosition;"
"in vec2 vertTexCoord[3];"
"out gl_PerVertex {"
" vec4 gl_Position;"
" float gl_ClipDistance[3];"
"};"
"flat out mat3 geomPositionFront;"
"flat out mat3 geomTexCoordFront;"
"flat out vec3 geomWFront;"
"noperspective out vec3 geomBarycentric;"
"out vec3 geomPosition;"
"out vec3 geomTexCoord;"
"void main()"
"{"
" vec4 world_pos[8*3];"
" vec3 tex_coord[8*3];"
" vec4 view_pos[8*3];"
" vec3 screen_pos[8*3];"
" bool front_facing[8];"
" int ft = gl_InvocationID+1;"
" for(int pass=0; pass!=2; ++pass)"
" {"
" bool first = pass == 0;"
" if(((ft == 0) && first) || (((ft != 0) && !first)))"
" {"
" for(int v=0; v!=3; ++v)"
" {"
" int w = 2-v;"
" world_pos[0+v] = gl_in[w].gl_Position;"
" tex_coord[0+v] = vec3(vertTexCoord[w], 0.0);"
" }"
" }"
" vec4 n = vec4(-0.15 * normalize(cross("
" gl_in[1].gl_Position.xyz-gl_in[0].gl_Position.xyz,"
" gl_in[2].gl_Position.xyz-gl_in[0].gl_Position.xyz "
" )), 0.0);"
" if(((ft == 1) && first) || (((ft != 1) && !first)))"
" {"
" for(int v=0; v!=3; ++v)"
" {"
" world_pos[3+v] = gl_in[v].gl_Position + n;"
" tex_coord[3+v] = vec3(vertTexCoord[v], 1.0);"
" }"
" }"
" for(int v=0; v!=3; ++v)"
" {"
" int w = (v+1)%3;"
" int k = 2+2*v;"
" if(((ft == k) && first) || (((ft != k) && !first)))"
" {"
" world_pos[6+0+v*6] = gl_in[v].gl_Position;"
" tex_coord[6+0+v*6] = vec3(vertTexCoord[v], 0.0);"
" world_pos[6+1+v*6] = gl_in[w].gl_Position;"
" tex_coord[6+1+v*6] = vec3(vertTexCoord[w], 0.0);"
" world_pos[6+2+v*6] = gl_in[v].gl_Position + n;"
" tex_coord[6+2+v*6] = vec3(vertTexCoord[v], 1.0);"
" }"
" k = 3+2*v;"
" if(((ft == k) && first) || (((ft != k) && !first)))"
" {"
" world_pos[6+3+v*6] = gl_in[w].gl_Position;"
" tex_coord[6+3+v*6] = vec3(vertTexCoord[w], 0.0);"
" world_pos[6+4+v*6] = gl_in[w].gl_Position + n;"
" tex_coord[6+4+v*6] = vec3(vertTexCoord[w], 1.0);"
" world_pos[6+5+v*6] = gl_in[v].gl_Position + n;"
" tex_coord[6+5+v*6] = vec3(vertTexCoord[v], 1.0);"
" }"
" }"
" for(int t=first?ft:0; t!=8; ++t)"
" {"
" if(!first && (t == ft)) continue;"
" int o = t*3;"
" for(int v=0; v!=3; ++v)"
" {"
" int w = o+v;"
" view_pos[w] = Matrix * world_pos[w];"
" screen_pos[w] = view_pos[w].xyz/view_pos[w].w;"
" }"
" front_facing[t] = cross("
" screen_pos[o+1]-screen_pos[o+0],"
" screen_pos[o+2]-screen_pos[o+0] "
" ).z < 0.0;"
" if(first) break;"
" }"
" if(first && !front_facing[ft]) return;"
" }"
" int o = ft*3;"
" vec4 clip_plane[3];"
" for(int v=0; v!=3; ++v)"
" {"
" int w = (v+1)%3;"
" vec3 p0 = world_pos[o+v].xyz;"
" vec3 p1 = world_pos[o+w].xyz;"
" vec3 p2 = CameraPosition;"
" vec3 pv = normalize(cross(p1-p0, p2-p0));"
" clip_plane[v] = vec4(pv, -dot(pv, p0));"
" }"
" vec3 lo = CameraPosition;"
" vec3 p0 = world_pos[o+0].xyz;"
" vec3 pu = world_pos[o+1].xyz-p0;"
" vec3 pv = world_pos[o+2].xyz-p0;"
" vec3 lp = lo-p0;"
" float w0 = view_pos[o+0].w;"
" float wu = view_pos[o+1].w-w0;"
" float wv = view_pos[o+2].w-w0;"
" vec3 t0 = tex_coord[o+0];"
" vec3 tu = tex_coord[o+1]-t0;"
" vec3 tv = tex_coord[o+2]-t0;"
" for(int bt=0; bt!=8; ++bt)"
" {"
" int k = bt*3;"
" if((ft != bt) && !front_facing[bt])"
" {"
" for(int v=0; v!=3; ++v)"
" {"
" vec3 lt = world_pos[k+v].xyz;"
" mat3 im = mat3(lo-lt, pu, pv);"
" vec3 ic = inverse(im)*lp;"
" float s = ic.y;"
" float t = ic.z;"
" geomPositionFront[v] = p0+pu*s+pv*t;"
" geomTexCoordFront[v] = t0+tu*s+tv*t;"
" geomWFront[v] = w0+wu*s+wv*t;"
" }"
" for(int v=0; v!=3; ++v)"
" {"
" int w = k+v;"
" gl_Position = view_pos[w];"
" for(int c=0; c!=3; ++c)"
" {"
" gl_ClipDistance[c] = dot("
" clip_plane[c],"
" world_pos[w]"
" );"
" }"
" geomPosition = world_pos[w].xyz;"
" geomTexCoord = tex_coord[w];"
" geomBarycentric = vec3(0.0);"
" geomBarycentric[v] = 1.0;"
" EmitVertex();"
" }"
" EndPrimitive();"
" }"
" }"
"}"))
.Compile();
prog.AttachShader(gs);
FragmentShader fs;
fs.Source(StrCRef("#version 150\n"
"uniform float Time;"
"uniform sampler2D ColorMap;"
"uniform sampler2D BumpMap;"
"uniform vec3 LightPosition;"
"flat in mat3 geomPositionFront;"
"flat in mat3 geomTexCoordFront;"
"flat in vec3 geomWFront;"
"noperspective in vec3 geomBarycentric;"
"in vec3 geomPosition;"
"in vec3 geomTexCoord;"
"out vec3 fragColor;"
"vec3 vcdiv(vec3 a, vec3 b)"
"{"
" return vec3(a.x/b.x, a.y/b.y, a.z/b.z);"
"}"
"void main()"
"{"
" const vec3 one = vec3(1.0, 1.0, 1.0);"
" vec3 bzfv = vcdiv(geomBarycentric,geomWFront);"
" vec3 p0 = geomPosition;"
" vec3 p1 = (geomPositionFront*bzfv)/dot(one,bzfv);"
" vec3 tc0 = geomTexCoord;"
" vec3 tc1 = (geomTexCoordFront*bzfv)/dot(one,bzfv);"
" ivec2 ts = textureSize(BumpMap, 0);"
" int mts = max(ts.x, ts.y);"
" vec2 dtc = tc1.xy - tc0.xy;"
" float mdtc = max(abs(dtc.x), abs(dtc.y));"
" int nsam = max(min(int(mdtc*mts), mts/2), 1);"
" float step = 1.0 / nsam;"
" for(int s=0; s<=nsam; ++s)"
" {"
" vec3 tc = mix(tc1, tc0, s*step);"
" vec4 bm = texture(BumpMap, tc.xy);"
" if(tc.z <= bm.w)"
" {"
" vec3 p = mix(p1, p0, s*step);"
" vec3 ldir = normalize(LightPosition - p);"
" float l = max(dot(ldir, bm.xzy), 0.0)*1.3;"
" fragColor = texture(ColorMap, tc.xy).rgb*l;"
" return;"
" }"
" }"
" discard;"
"}"))
.Compile();
prog.AttachShader(fs);
prog.Link();
prog.Use();
return prog;
}
TorusExample(void)
: make_torus(1.0, 0.5, 18, 36)
, torus_instr(make_torus.Instructions())
, torus_indices(make_torus.Indices())
, vs(ObjectDesc("Vertex"))
, gs(ObjectDesc("Geometry"))
, face_fs(ObjectDesc("Face fragment"))
, frame_fs(ObjectDesc("Frame fragment"))
, transf_prog(ObjectDesc("Transformation"))
, face_prog(ObjectDesc("Face"))
, frame_prog(ObjectDesc("Frame"))
, projection_matrix(transf_prog, "ProjectionMatrix")
, camera_matrix(transf_prog, "CameraMatrix")
, model_matrix(transf_prog, "ModelMatrix")
, transf_time(transf_prog, "Time")
{
vs.Source(
"#version 330\n"
"uniform mat4 ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"in vec2 TexCoord;"
"out gl_PerVertex {"
" vec4 gl_Position;"
"};"
"out vec3 vertNormal;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = (ModelMatrix*vec4(Normal,0.0)).xyz;"
" vertTexCoord = TexCoord;"
"}"
);
vs.Compile();
gs.Source(
"#version 330\n"
"layout(triangles) in;"
"layout(triangle_strip, max_vertices = 15) out;"
"uniform mat4 CameraMatrix, ProjectionMatrix;"
"uniform vec3 LightPos;"
"uniform float Time;"
"in gl_PerVertex {"
" vec4 gl_Position;"
"} gl_in[];"
"in vec3 vertNormal[];"
"in vec2 vertTexCoord[];"
"out gl_PerVertex {"
" vec4 gl_Position;"
"};"
"out vec3 geomNormal;"
"out vec3 geomLight;"
"out float geomGlow;"
"flat out int geomTop;"
"void main(void)"
"{"
" vec3 FaceNormal = normalize("
" vertNormal[0]+"
" vertNormal[1]+"
" vertNormal[2] "
" );"
" vec2 FaceCoord = 0.33333 * ("
" vertTexCoord[0]+"
" vertTexCoord[1]+"
" vertTexCoord[2] "
" );"
" float Offs = (sin((FaceCoord.s + Time/10.0)* 3.14 * 2.0 * 10)*0.5 + 0.5)*0.4;"
" Offs *= cos(FaceCoord.t * 3.1415 * 2.0)*0.5 + 0.51;"
" vec3 pos[3], norm[3];"
" for(int i=0; i!=3; ++i)"
" pos[i] = gl_in[i].gl_Position.xyz;"
" for(int i=0; i!=3; ++i)"
" norm[i] = cross("
" FaceNormal, "
" normalize(pos[(i+1)%3] - pos[i])"
" );"
" vec3 pofs = FaceNormal * Offs;"
" geomTop = 0;"
" for(int i=0; i!=3; ++i)"
" {"
" geomNormal = norm[i];"
" for(int j=0; j!=2; ++j)"
" {"
" vec3 tpos = pos[(i+j)%3];"
" geomLight = LightPos-tpos;"
" geomGlow = 1.0;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" vec4(tpos, 1.0);"
" EmitVertex();"
" geomGlow = 0.7;"
" geomLight = LightPos-tpos+pofs;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" vec4(tpos + pofs, 1.0);"
" EmitVertex();"
" }"
" EndPrimitive();"
" }"
" geomGlow = 0.0;"
" geomTop = 1;"
" for(int i=0; i!=3; ++i)"
" {"
" geomLight = LightPos - (pos[i]+pofs);"
" geomNormal = vertNormal[i];"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" vec4(pos[i] + pofs, 1.0);"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
gs.Compile();
transf_prog.AttachShader(vs);
transf_prog.AttachShader(gs);
transf_prog.MakeSeparable();
transf_prog.Link();
transf_prog.Use();
ProgramUniform<Vec3f>(transf_prog, "LightPos").Set(4, 4, -8);
torus.Bind();
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(transf_prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(transf_prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(transf_prog, "TexCoord");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
face_fs.Source(
"#version 330\n"
"in vec3 geomNormal;"
"in vec3 geomLight;"
"in float geomGlow;"
"flat in int geomTop;"
"uniform vec3 TopColor, SideColor;"
"const vec3 LightColor = vec3(1.0, 1.0, 1.0);"
"out vec4 fragColor;"
"void main(void)"
"{"
" float d = max(dot("
" normalize(geomLight),"
" normalize(geomNormal)"
" ), 0.0);"
" vec3 color;"
" if(geomTop != 0)"
" {"
" color = TopColor * d +"
" LightColor * pow(d, 8.0);"
" }"
" else"
" {"
" color = SideColor * geomGlow +"
" LightColor *"
" pow(d, 2.0) * 0.2;"
" }"
" fragColor = vec4(color, 1.0);"
"}"
);
face_fs.Compile();
face_prog.AttachShader(face_fs);
face_prog.MakeSeparable();
face_prog.Link();
ProgramUniform<Vec3f>(face_prog, "TopColor").Set(0.2f, 0.2f, 0.2f);
ProgramUniform<Vec3f>(face_prog, "SideColor").Set(0.9f, 0.9f, 0.2f);
face_pp.Bind();
face_prog.Use();
face_pp.UseStages(transf_prog).Vertex().Geometry();
face_pp.UseStages(face_prog).Fragment();
frame_fs.Source(
"#version 330\n"
"out vec4 fragColor;"
"void main(void)"
"{"
" fragColor = vec4(0.2, 0.1, 0.0, 1.0);"
"}"
);
frame_fs.Compile();
frame_prog.AttachShader(frame_fs);
frame_prog.MakeSeparable();
frame_prog.Link();
frame_pp.Bind();
frame_prog.Use();
frame_pp.UseStages(transf_prog).Vertex().Geometry();
frame_pp.UseStages(frame_prog).Fragment();
ProgramPipeline::Unbind();
Program::UseNone();
gl.ClearColor(0.7f, 0.6f, 0.5f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.DepthFunc(CompareFn::Less);
gl.FrontFace(make_torus.FaceWinding());
}
ParticlesExample(void)
: projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, particle_count(100)
, prev_time(0.0)
, prev_spawn(0.0)
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ModelMatrix, CameraMatrix;"
"in vec4 Position;"
"in float Age;"
"out float vertAge;"
"void main(void)"
"{"
" gl_Position = "
" CameraMatrix *"
" ModelMatrix *"
" Position;"
" vertAge = Age;"
"}"
);
// compile it
vs.Compile();
// Set the geometry shader source
gs.Source(
"#version 330\n"
"layout(points) in;"
"layout(triangle_strip, max_vertices = 4) out;"
"uniform mat4 ProjectionMatrix;"
"in float vertAge[];"
"out float geomAge;"
"void main(void)"
"{"
" float s = 0.5;"
" float yo[2] = float[2](-1.0, 1.0);"
" float xo[2] = float[2](-1.0, 1.0);"
" for(int j=0;j!=2;++j)"
" for(int i=0;i!=2;++i)"
" {"
" float xoffs = xo[i]*(1.0+vertAge[0])*s;"
" float yoffs = yo[j]*(1.0+vertAge[0])*s;"
" gl_Position = ProjectionMatrix * vec4("
" gl_in[0].gl_Position.x-xoffs,"
" gl_in[0].gl_Position.y-yoffs,"
" gl_in[0].gl_Position.z,"
" 1.0"
" );"
" geomAge = vertAge[0];"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
// compile it
gs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"in float geomAge;"
"out vec4 fragColor;"
"void main(void)"
"{"
" vec3 Color1 = vec3(1.0, 0.5, 0.5);"
" vec3 Color2 = vec3(0.3, 0.1, 0.1);"
" fragColor = vec4("
" mix(Color1, Color2, geomAge),"
" 1.0 - geomAge"
" );"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(gs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the particles
particles.Bind();
// bind the VBO for the particle positions
pos_buf.Bind(Buffer::Target::Array);
{
Buffer::Data(Buffer::Target::Array, positions);
VertexAttribArray attr(prog, "Position");
attr.Setup(3, DataType::Float);
attr.Enable();
}
positions.reserve(particle_count);
directions.reserve(particle_count);
// bind the VBO for the particle ages
age_buf.Bind(Buffer::Target::Array);
{
Buffer::Data(Buffer::Target::Array, ages);
VertexAttribArray attr(prog, "Age");
attr.Setup(1, DataType::Float);
attr.Enable();
}
ages.reserve(particle_count);
Uniform<Mat4f>(prog, "ModelMatrix").Set(
ModelMatrixf::Translation(0.0f, -10.0f, 0.0f)
);
//
gl.ClearColor(0.9f, 0.9f, 0.9f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::Blend);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::OneMinusSrcAlpha);
}
RectangleExample(void)
: vs(ShaderType::Vertex)
, fs(ShaderType::Fragment)
{
// this could be any istream
std::stringstream vs_source(
"#version 330\n"
"in vec2 Position;"
"in vec3 Color;"
"out vec3 vertColor;"
"void main(void)"
"{"
" vertColor = Color;"
" gl_Position = vec4(Position, 0.0, 1.0);"
"}"
);
// set the vertex shader source
vs.Source(GLSLSource::FromStream(vs_source));
// compile it
vs.Compile();
std::stringstream fs_source(
"#version 330\n"
"in vec3 vertColor;"
"out vec4 fragColor;"
"void main(void)"
"{"
" fragColor = vec4(vertColor, 1.0);"
"}"
);
// set the fragment shader source
fs.Source(GLSLSource::FromStream(fs_source));
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the rectangle
rectangle.Bind();
GLfloat rectangle_verts[8] = {
-1.0f, -1.0f,
-1.0f, 1.0f,
1.0f, -1.0f,
1.0f, 1.0f
};
// bind the VBO for the rectangle vertices
verts.Bind(Buffer::Target::Array);
// upload the data
Buffer::Data(Buffer::Target::Array, 8, rectangle_verts);
// setup the vertex attribs array for the vertices
VertexAttribArray vert_attr(prog, "Position");
vert_attr.Setup<Vec2f>().Enable();
GLfloat rectangle_colors[12] = {
1.0f, 1.0f, 1.0f,
1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 1.0f,
};
// bind the VBO for the rectangle colors
colors.Bind(Buffer::Target::Array);
// upload the data
Buffer::Data(Buffer::Target::Array, 12, rectangle_colors);
// setup the vertex attribs array for the vertices
VertexAttribArray color_attr(prog, "Color");
color_attr.Setup<Vec3f>().Enable();
//
gl.Disable(Capability::DepthTest);
}
CubeExample(void)
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"in vec2 TexCoord;"
"out vec3 vertNormal;"
"out vec3 vertLight;"
"out vec2 vertTexCoord;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" vertNormal = mat3(ModelMatrix)*Normal;"
" gl_Position = ModelMatrix * Position;"
" vertLight = LightPos - gl_Position.xyz;"
" vertTexCoord = TexCoord * 6.0;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"uniform sampler2D TexUnit;"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = dot(vertLight, vertLight);"
" float d = l != 0.0 ? dot("
" vertNormal, "
" normalize(vertLight)"
" ) / l : 0.0;"
" vec3 c = vec3(0.9, 0.8, 0.2);"
" vec4 t = texture(TexUnit, vertTexCoord);"
" float a = 1.0 - sqrt(abs(d)), e;"
" if(gl_FrontFacing)"
" {"
" e = d >= 0.0 ?"
" d * mix(0.5, 1.0, t.a):"
" (-0.9*d) * (1.0 - t.a);"
" }"
" else"
" {"
" e = d >= 0.0 ?"
" (0.6*d) * (1.0 - t.a):"
" (-0.7*d) * mix(0.5, 1.0, t.a);"
" }"
" float i = 0.1 + 9.0*e;"
" fragColor = vec4("
" t.r*c.r*i, "
" t.g*c.g*i, "
" t.b*c.b*i, "
" clamp(pow(t.a,2) + a*0.4, 0.0, 1.0)"
" );"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the cube
cube.Bind();
verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "Position");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "Normal");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
VertexAttribArray attr(prog, "TexCoord");
attr.Setup(n_per_vertex, DataType::Float);
attr.Enable();
}
// setup the texture
{
auto bound_tex = Bind(tex, Texture::Target::_2D);
bound_tex.Image2D(images::LoadTexture("honeycomb"));
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::MirroredRepeat);
bound_tex.WrapT(TextureWrap::MirroredRepeat);
}
//
UniformSampler(prog, "TexUnit").Set(0);
Uniform<Vec3f>(prog, "LightPos").Set(Vec3f(1.0f, 2.0f, 3.0f));
//
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::Blend);
gl.BlendFunc(
BlendFn::SrcAlpha,
BlendFn::OneMinusSrcAlpha
);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_cube.FaceWinding());
}
int main(int argc, char** argv)
{
int width = 800;
int height = 600;
SDL_Window* window = SDL_CreateWindow("Demo: A Modern OpenGL Application in Modern C++", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, width, height, SDL_WINDOW_OPENGL);
if(window == nullptr)
{
std::cerr << SDL_GetError() << std::endl;
return 0;
}
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 4);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);
SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8);
SDL_GLContext context = SDL_GL_CreateContext(window);
if(context == nullptr)
{
SDL_DestroyWindow(window);
std::cerr << SDL_GetError() << std::endl;
return 0;
}
glewInit();
// OpenGL initialization
using namespace Render::OpenGL;
Program program;
Shader vertex("../shaders/simple.vert");
program.AttachShader(vertex);
vertex.Compile();
vertex.PrintInfoLog();
Shader fragment("../shaders/simple.frag");
program.AttachShader(fragment);
fragment.Compile();
fragment.PrintInfoLog();
program.BindFragDataLocation(0, "FragColor");
program.Link();
program.PrintInfoLog();
program.Use();
program.PrintInfoLog();
PrintError();
glm::mat4 Projection = glm::perspective(45.0f, 4.0f / 3.0f, 1.0f, 100.f);
program.UniformMatrix("Projection", Projection);
glm::mat4 Modelview = glm::translate(glm::mat4(1.0f), glm::vec3(0.f,0.f,-4.0f));
program.UniformMatrix("Modelview", Modelview);
glViewport(0,0,800,600);
for(int i = 0; i < 3000; i++)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glBegin(GL_TRIANGLES);
program.VertexAttrib("Vertex", 0.f, 0.f, 0.f);
program.VertexAttrib("Vertex", 0.f, .5f, 0.f);
program.VertexAttrib("Vertex", .5f, .5f, 0.f);
glEnd();
SDL_GL_SwapWindow(window);
SDL_Delay(1);
}
SDL_GL_DeleteContext(context);
SDL_DestroyWindow(window);
return 0;
}
