static Program make(void)
{
VertexShader vs;
vs.Source(
"#version 330\n"
"uniform mat4 CameraMatrix,ModelMatrix;"
"in vec4 Position;"
"void main(void)"
"{"
" gl_Position = CameraMatrix * ModelMatrix * Position;"
"}"
).Compile();
FragmentShader fs;
fs.Source(
"#version 330\n"
"void main(void)"
"{"
"}"
).Compile();
Program prog;
prog << vs << fs;
prog.Link().Use();
return std::move(prog);
}
static Program make_prog(FBTexExample& example)
{
Program prog(ObjectDesc("Thread"));
prog.AttachShader(example.vertex_shader);
FragmentShader fs(ObjectDesc("Thread fragment"));
fs.Source(
"#version 330\n"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"in vec2 vertTexCoord;"
"out vec3 fragColor;"
"void main(void)"
"{"
" float d = max(dot("
" vertNormal, "
" normalize(vertLight)"
" ), 0.0);"
" float i = int("
" vertTexCoord.x*18.0+"
" vertTexCoord.y*14.0 "
" ) % 2;"
" vec3 Red = vec3(1.0, 0.2, 0.2);"
" vec3 White = vec3(1.0, 1.0, 1.0);"
" fragColor = (0.4+0.8*d)*mix(Red, White, i);"
"}"
);
fs.Compile();
prog.AttachShader(fs);
prog.Link().Use();
return std::move(prog);
}
static Program make(void)
{
Program prog;
prog << VertexShader(ObjectDesc("Mesh"),
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"void main(void)"
"{"
" gl_Position = "
" ProjectionMatrix*CameraMatrix*ModelMatrix*Position;"
"}"
);
prog << FragmentShader(ObjectDesc("Mesh"),
"#version 330\n"
"out vec3 fragColor;"
"void main(void)"
"{"
" fragColor = vec3(0.1);"
"}"
);
prog.Link();
return prog;
}
static Program make_prog(void)
{
Program prog;
VertexShader vs;
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"mat4 Matrix = ProjectionMatrix*CameraMatrix*ModelMatrix;"
"in vec4 Position;"
"void main(void)"
"{"
" gl_Position = Matrix*Position;"
"}"
);
FragmentShader fs;
fs.Source(
"#version 330\n"
"void main(void){ }"
);
prog.AttachShader(vs).AttachShader(fs);
prog.Link().Validate().Use();
return std::move(prog);
}
static Program make(const VertexShader& vs)
{
Program prog;
FragmentShader fs(ObjectDesc("Draw"));
fs.Source(
"#version 140\n"
"const vec3 LightColor = vec3(0.6, 0.6, 1.0);"
"const vec3 Up = normalize(vec3(0.1, 1.0, 0.1));"
"uniform vec3 LightScreenPos;"
"uniform vec2 ScreenSize;"
"uniform sampler2DRect LightMap;"
"uniform sampler2DShadow ShadowMap;"
"in vec3 vertNormal;"
"in vec3 vertLightDir;"
"in vec4 vertShadowCoord;"
"out vec3 fragColor;"
"void main(void)"
"{"
" vec3 ShadowCoord = (vertShadowCoord.xyz/vertShadowCoord.w)*0.5 + 0.5;"
" float s = 0.0f;"
" if("
" ShadowCoord.x >= 0.0 && "
" ShadowCoord.x <= 1.0 && "
" ShadowCoord.y >= 0.0 && "
" ShadowCoord.y <= 1.0 && "
" ShadowCoord.z <= 1.0"
" ) s = texture(ShadowMap, ShadowCoord);"
" float a = 0.1*(max(dot(vertNormal, Up)+0.1, 0.0)+0.1);"
" float d = max(dot(vertNormal, vertLightDir)+0.1, 0.0)+a;"
" vec2 LMCoord = gl_FragCoord.xy;"
" vec2 LPos = (LightScreenPos.xy*0.5+0.5)*ScreenSize;"
" vec2 Ray = LMCoord - LPos;"
" float Len = length(Ray);"
" int NSampl = int(max(abs(Ray.x), abs(Ray.y)))+1;"
" vec2 RayStep = Ray / NSampl;"
" float r = texture(LightMap, LMCoord).r;"
" NSampl = min(NSampl, int(min(ScreenSize.x, ScreenSize.y)*0.25));"
" for(int s=0; s!=NSampl;++s)"
" {"
" r += texture(LightMap, LPos+RayStep*s).r;"
" }"
" r /= NSampl;"
" r = min(r, 1.0);"
" fragColor = LightColor * (mix(a, d, s) + r);"
"}"
).Compile();
prog.AttachShader(vs).AttachShader(fs);
prog.Link().Use();
return prog;
}
RectangleExample(void)
{
prog << "#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);"
"}"_glsl_vs;
prog << "#version 330\n"
"in vec3 vertColor;"
"out vec4 fragColor;"
"void main(void)"
"{"
" fragColor = vec4(vertColor, 1.0);"
"}"_glsl_fs;
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(2, DataType::Float);
vert_attr.Enable();
GLfloat rectangle_colors[12] = {
0.0f, 1.0f, 1.0f,
1.0f, 0.0f, 1.0f,
1.0f, 1.0f, 0.0f,
0.0f, 0.0f, 0.0f,
};
// 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(3, DataType::Float);
color_attr.Enable();
//
gl.ClearDepth(1.0f);
}
static Program make(const LiquidProgramShaders& shaders)
{
Program prog;
prog.AttachShader(shaders.vertex);
prog.AttachShader(shaders.geometry);
prog.AttachShader(shaders.fragment);
prog.Link().Use();
return prog;
}
static Program make(void)
{
Program prog;
prog.AttachShader(LiquidVertShader());
prog.AttachShader(LiquidGeomShader());
prog.AttachShader(LiquidFragShader());
prog.Link().Use();
return prog;
}
static Program make_prog(void)
{
VertexShader vs;
vs.Source(
"#version 130\n"
"uniform mat4 ProjectionMatrix, ModelMatrix, CameraMatrix;"
"uniform vec4 ClipPlane;"
"attribute vec4 Position;"
"attribute vec2 TexCoord;"
"varying vec2 vertTexCoord;"
"void main(void)"
"{"
" vertTexCoord = TexCoord;"
" gl_Position = "
" ModelMatrix *"
" Position;"
" gl_ClipDistance[0] = dot(ClipPlane, gl_Position);"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" gl_Position;"
"}"
);
vs.Compile();
FragmentShader fs;
fs.Source(
"#version 130\n"
"varying vec2 vertTexCoord;"
"void main(void)"
"{"
" float i = ("
" int(vertTexCoord.x*36) % 2+"
" int(vertTexCoord.y*24) % 2"
" ) % 2;"
" if(gl_FrontFacing)"
" {"
" gl_FragColor = vec4(1-i/2, 1-i/2, 1-i/2, 1.0);"
" }"
" else"
" {"
" gl_FragColor = vec4(0+i/2, 0+i/2, 0+i/2, 1.0);"
" }"
"}"
);
fs.Compile();
Program prog;
prog.AttachShader(vs);
prog.AttachShader(fs);
prog.Link();
prog.Use();
return prog;
}
Program * ProgramManager::AddProgram(const String &vertFileName, const String &fragFileName)
{
ProgramMapIterator it = mPrograms.find(vertFileName);
if (it != mPrograms.end())
return (*it).second;
InputStream *vertStream = FileSystem::GetPtr()->GetInputStream(vertFileName);
if (!vertStream)
{
LogError("Unable to open vertex shader file %s", vertFileName);
return NULL;
}
InputStream *fragStream = FileSystem::GetPtr()->GetInputStream(fragFileName);
if (!fragStream)
{
LogError("Unable to open fragment shader file %s", fragFileName);
return NULL;
}
Program *program = mGraphicsDevice->CreateProgram(vertFileName);
if (!program->LoadShader(Program::ShaderType_Vertex, vertStream))
{
LogError("Unable to load vertex shader %s", vertStream->GetFileName());
SafeDelete(program);
return NULL;
}
if (!program->LoadShader(Program::ShaderType_Fragment, fragStream))
{
LogError("Unable to load frag shader %s", fragStream->GetFileName());
SafeDelete(program);
return NULL;
}
if (!program->Link())
{
LogError("Unable to link program %s", vertStream->GetFileName());
SafeDelete(program);
return NULL;
}
mPrograms[vertStream->GetFileName()] = program;
return program;
}
static Program make(const VertexShader& vs)
{
Program prog;
FragmentShader fs(ObjectDesc("Shadow"));
fs.Source(
"#version 140\n"
"void main(void) { }"
).Compile();
prog.AttachShader(vs).AttachShader(fs);
prog.Link().Use();
return prog;
}
static Program make_prog(void)
{
VertexShader vs;
vs.Source(
"#version 330\n"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertColor;"
"out vec3 vertNormal;"
"out vec3 vertLight;"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertColor = abs(normalize(Normal+vec3(1, 1, 1)));"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLight = LightPos - gl_Position.xyz;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
vs.Compile();
FragmentShader fs;
fs.Source(
"#version 330\n"
"in vec3 vertColor;"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = dot(vertLight, vertLight);"
" float d = l > 0.0 ? dot(vertNormal, normalize(vertLight)) / l : 0.0;"
" float i = 0.2 + max(d*3.2, 0.0);"
" fragColor = vec4(vertColor*i, 1.0);"
"}"
);
fs.Compile();
Program prog;
prog.AttachShader(vs);
prog.AttachShader(fs);
prog.Link();
return prog;
}
Particle(const VertexShader& vs, FragmentShader&& frag)
: sphere_instr(make_sphere.Instructions())
, sphere_indices(make_sphere.Indices())
, fs(std::forward<FragmentShader>(frag))
{
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
projection_matrix = (prog/"ProjectionMatrix");
camera_matrix = (prog/"CameraMatrix");
model_matrix = (prog/"ModelMatrix");
light_pos = (prog/"LightPos");
// bind the VAO for the sphere
sphere.Bind();
const GLuint n_attr = 2;
// pointers to the vertex attribute data build functions
typedef GLuint (shapes::Sphere::*Func)(std::vector<GLfloat>&) const;
Func func[n_attr] = {
&shapes::Sphere::Positions,
&shapes::Sphere::Normals,
};
// managed references to the VBOs
Reference<Buffer> vbo[n_attr] = {verts, normals};
// vertex attribute identifiers from the shaders
const GLchar* ident[n_attr] = {"Position", "Normal"};
for(GLuint i=0; i!=n_attr; ++i)
{
// bind the VBO
vbo[i].Bind(Buffer::Target::Array);
// make the data
std::vector<GLfloat> data;
GLuint n_per_vertex = (make_sphere.*func[i])(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attrib
VertexArrayAttrib attr(prog, ident[i]);
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
}
static Program make_face_prog(void)
{
FragmentShader fs;
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);"
"}"
);
fs.Compile();
Program prog;
prog.AttachShader(fs);
prog.MakeSeparable();
prog.Link();
ProgramUniform<Vec3f>(prog, "TopColor").Set(0.2f, 0.2f, 0.2f);
ProgramUniform<Vec3f>(prog, "SideColor").Set(0.9f, 0.9f, 0.2f);
return prog;
}
static Program make_frame_prog(void)
{
FragmentShader fs;
fs.Source(
"#version 330\n"
"out vec4 fragColor;"
"void main(void)"
"{"
" fragColor = vec4(0.2, 0.1, 0.0, 1.0);"
"}"
);
fs.Compile();
Program prog;
prog.AttachShader(fs);
prog.MakeSeparable();
prog.Link();
return prog;
}
static Program make(void)
{
Program prog;
prog << VertexShader(ObjectDesc("Sort"),
"#version 330\n"
"uniform usampler2DRect SortNW;"
"uniform int Pass;"
"layout (packed) uniform IndexBlock{ uint Indices[4096]; };"
"layout (packed) uniform DistBlock { float Distances[4096]; };"
"in uint Index;"
"out uint xfbIndex;"
"void main(void)"
"{"
" uint enc = texelFetch(SortNW, ivec2(gl_VertexID, Pass)).r;"
" if(enc != 0u)"
" {"
" int Sig1 = ((enc & 0x1u) != 0u)?-1:1;"
" int Sig2 = ((enc & 0x2u) != 0u)?-1:1;"
" int Offs = Sig2 * int(enc >> 2);"
" uint Index2 = Indices[gl_VertexID+Offs];"
" float Diff = Distances[Index] - Distances[Index2];"
" if(Diff*Sig1*Sig2 < 0)"
" {"
" xfbIndex = Index2;"
" return;"
" }"
" }"
" xfbIndex = Index;"
"}"
);
prog.TransformFeedbackVarying("xfbIndex");
prog.Link();
return prog;
}
static Program make(void)
{
Program result;
VertexShader vs;
vs.Source(
"#version 330\n"
"#define side 128\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"uniform float Fade;"
"uniform sampler2D Offsets;"
"uniform sampler2D Heights;"
"in vec4 Position;"
"void main(void)"
"{"
" ivec2 Coord = ivec2(gl_InstanceID%side, gl_InstanceID/side);"
" vec2 Offs = texelFetch(Offsets, Coord, 0).xy;"
" float Height = 1.0-texelFetch(Heights, Coord, 0).r;"
" gl_Position = Position;"
" gl_Position.xz += Offs;"
" gl_Position.y *= max(Height*Fade*side/2, 0.5);"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
).Compile();
FragmentShader fs;
fs.Source(
"#version 330\n"
"void main(void) { }"
).Compile();
result.AttachShader(vs).AttachShader(fs);
result.Link().Validate().Use();
return std::move(result);
}
bool ShaderLoader::Load(ShaderResource** resource, Handle handle, const std::string& filename1, const std::string& filename2)
{
*resource = new ShaderResource(handle, filename1);
Program* shader = new Program();
(*resource)->mRaw = shader;
VertexShader vs;
vs.Source(readFile(filename1));
vs.Compile();
FragmentShader fs;
fs.Source(readFile(filename2));
fs.Compile();
shader->AttachShader(vs).AttachShader(fs);
shader->BindAttribute(VertexAttributes::POSITION, "in_Position");
shader->BindAttribute(VertexAttributes::NORMAL, "in_Normal");
shader->BindAttribute(VertexAttributes::TANGENT, "in_Tangent");
shader->BindAttribute(VertexAttributes::TEXCOORD, "in_TexCoords");
shader->Link();
return true;
}
Program RaytraceProg::make(void)
{
Program prog;
ResourceFile vs_source("glsl", "raytrace", ".vs.glsl");
prog << VertexShader(GLSLSource::FromStream(vs_source));
ResourceFile fs_rs_source("glsl", "raysample", ".fs.glsl");
prog << FragmentShader(GLSLSource::FromStream(fs_rs_source));
ResourceFile fs_rt_source("glsl", "raytrace", ".fs.glsl");
prog << FragmentShader(GLSLSource::FromStream(fs_rt_source));
ResourceFile fs_pk_source("glsl", "pack", ".fs.glsl");
prog << FragmentShader(GLSLSource::FromStream(fs_pk_source));
ResourceFile fs_en_source("glsl", "encode", ".fs.glsl");
prog << FragmentShader(GLSLSource::FromStream(fs_en_source));
prog.Link().Use();
return std::move(prog);
}
static Program make(const VertexShader& vs)
{
Program prog;
FragmentShader fs(ObjectDesc("Mask"));
fs.Source(
"#version 140\n"
"uniform sampler2DShadow ShadowMap;"
"in vec3 vertNormal;"
"in vec3 vertLightDir;"
"in vec4 vertShadowCoord;"
"out float fragIntensity;"
"void main(void)"
"{"
" vec3 ShadowCoord = (vertShadowCoord.xyz/vertShadowCoord.w)*0.5 + 0.5;"
" float s = 0.0f;"
" if("
" ShadowCoord.x >= 0.0 && "
" ShadowCoord.x <= 1.0 && "
" ShadowCoord.y >= 0.0 && "
" ShadowCoord.y <= 1.0 && "
" ShadowCoord.z <= 1.0"
" ) s = max(texture(ShadowMap, ShadowCoord), 0.05);"
" float l = max(dot(vertNormal, vertLightDir)+0.1, 0.0);"
" fragIntensity = l * s;"
"}"
).Compile();
prog.AttachShader(vs).AttachShader(fs);
prog.Link().Use();
return prog;
}
Program * ProgramFromShaderMap(const map<string, string> &mapShdString, const string &root) {
VertexShader vs;
FragmentShader fs;
Program *prog = new Program();
string defS("#version 420\n");
defS.append("#define MAX_BONES "); defS.append(ConvertIntString(G_MAX_BONES_UNIFORM)); defS.append("\n");
defS.append("#define MAX_BONES_INFL "); defS.append(ConvertIntString(G_MAX_BONES_INFLUENCING)); defS.append("\n");
string vsSrc(defS);
vsSrc.append(mapShdString.at(string("vs").append(root)));
string fsSrc(defS);
fsSrc.append(mapShdString.at(string("fs").append(root)));
vs.Source(vsSrc);
fs.Source(fsSrc);
vs.Compile();
fs.Compile();
prog->AttachShader(vs);
prog->AttachShader(fs);
prog->Link();
return prog;
}
Program RenderProg::make(const AppData& app_data)
{
Program prog;
ResourceFile vs_source("glsl", "render", ".vs.glsl");
prog << VertexShader(GLSLSource::FromStream(vs_source));
ResourceFile pk_source("glsl", "pack", ".fs.glsl");
prog << FragmentShader(GLSLSource::FromStream(pk_source));
ResourceFile dc_source("glsl", "decode", ".fs.glsl");
prog << FragmentShader(GLSLSource::FromStream(dc_source));
std::string fs_name("render-");
fs_name.append(app_data.finish_shader);
ResourceFile fs_source("glsl", fs_name, ".fs.glsl");
prog << FragmentShader(GLSLSource::FromStream(fs_source));
prog.Link().Use();
Optional<Uniform<GLfloat>>(prog, "Near").TrySet(app_data.cam_near);
Optional<Uniform<GLfloat>>(prog, "Far").TrySet(app_data.cam_far);
Optional<Uniform<Vec3f>>(prog, "LightPos").TrySet(Vec3f(
app_data.light_x,
app_data.light_y,
app_data.light_z
));
Optional<Uniform<GLfloat>>(prog, "HighLight").TrySet(app_data.high_light);
Optional<Uniform<GLfloat>>(prog, "AmbiLight").TrySet(app_data.ambi_light);
Optional<Uniform<GLfloat>>(prog, "PlanetRadius").TrySet(app_data.planet_radius);
Optional<Uniform<GLfloat>>(prog, "AtmThickness").TrySet(app_data.atm_thickness);
return std::move(prog);
}
ReflectionExample(void)
: torus_indices(make_torus.Indices())
, torus_instr(make_torus.Instructions())
, vs_norm(ObjectDesc("Vertex-Normal"))
, vs_refl(ObjectDesc("Vertex-Reflection"))
, gs_refl(ObjectDesc("Geometry-Reflection"))
{
namespace se = oglplus::smart_enums;
// Set the normal object vertex shader source
vs_norm.Source(
"#version 330\n"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 geomColor;"
"out vec3 geomNormal;"
"out vec3 geomLight;"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" geomColor = Normal;"
" geomNormal = mat3(ModelMatrix)*Normal;"
" geomLight = LightPos-gl_Position.xyz;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
// compile it
vs_norm.Compile();
// Set the reflected object vertex shader source
// which just passes data to the geometry shader
vs_refl.Source(
"#version 330\n"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal;"
"void main(void)"
"{"
" gl_Position = Position;"
" vertNormal = Normal;"
"}"
);
// compile it
vs_refl.Compile();
// Set the reflected object geometry shader source
// This shader creates a reflection matrix that
// relies on the fact that the reflection is going
// to be done by the y-plane
gs_refl.Source(
"#version 330\n"
"layout(triangles) in;"
"layout(triangle_strip, max_vertices = 6) out;"
"in vec3 vertNormal[];"
"uniform mat4 ProjectionMatrix;"
"uniform mat4 CameraMatrix;"
"uniform mat4 ModelMatrix;"
"out vec3 geomColor;"
"out vec3 geomNormal;"
"out vec3 geomLight;"
"uniform vec3 LightPos;"
"mat4 ReflectionMatrix = 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(int v=0; v!=gl_in.length(); ++v)"
" {"
" vec4 Position = gl_in[v].gl_Position;"
" gl_Position = ModelMatrix * Position;"
" geomColor = vertNormal[v];"
" geomNormal = mat3(ModelMatrix)*vertNormal[v];"
" geomLight = LightPos - gl_Position.xyz;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" ReflectionMatrix *"
" gl_Position;"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
);
// compile it
gs_refl.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"in vec3 geomColor;"
"in vec3 geomNormal;"
"in vec3 geomLight;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = length(geomLight);"
" float d = l > 0.0 ? dot("
" geomNormal, "
" normalize(geomLight)"
" ) / l : 0.0;"
" float i = 0.2 + max(d, 0.0) * 2.0;"
" fragColor = vec4(abs(geomNormal)*i, 1.0);"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the normal rendering program
prog_norm.AttachShader(vs_norm);
prog_norm.AttachShader(fs);
// link it
prog_norm.Link();
// attach the shaders to the reflection rendering program
prog_refl.AttachShader(vs_refl);
prog_refl.AttachShader(gs_refl);
prog_refl.AttachShader(fs);
// link it
prog_refl.Link();
// bind the VAO for the torus
torus.Bind();
// bind the VBO for the torus vertices
torus_verts.Bind(se::Array());
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Positions(data);
// upload the data
Buffer::Data(se::Array(), data);
// setup the vertex attribs array for the vertices
typedef VertexAttribArray VAA;
VertexAttribSlot
loc_norm = VAA::GetLocation(prog_norm, "Position"),
loc_refl = VAA::GetLocation(prog_refl, "Position");
assert(loc_norm == loc_refl);
VertexAttribArray attr(loc_norm);
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// bind the VBO for the torus normals
torus_normals.Bind(se::Array());
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_torus.Normals(data);
// upload the data
Buffer::Data(se::Array(), data);
// setup the vertex attribs array for the normals
typedef VertexAttribArray VAA;
VertexAttribSlot
loc_norm = VAA::GetLocation(prog_norm, "Normal"),
loc_refl = VAA::GetLocation(prog_refl, "Normal");
assert(loc_norm == loc_refl);
VertexAttribArray attr(loc_norm);
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// bind the VAO for the plane
plane.Bind();
// bind the VBO for the plane vertices
plane_verts.Bind(se::Array());
{
GLfloat data[4*3] = {
-2.0f, 0.0f, 2.0f,
-2.0f, 0.0f, -2.0f,
2.0f, 0.0f, 2.0f,
2.0f, 0.0f, -2.0f
};
// upload the data
Buffer::Data(se::Array(), 4*3, data);
// setup the vertex attribs array for the vertices
prog_norm.Use();
VertexAttribArray attr(prog_norm, "Position");
attr.Setup<Vec3f>();
attr.Enable();
}
// bind the VBO for the torus normals
plane_normals.Bind(se::Array());
{
GLfloat data[4*3] = {
-0.1f, 1.0f, 0.1f,
-0.1f, 1.0f, -0.1f,
0.1f, 1.0f, 0.1f,
0.1f, 1.0f, -0.1f
};
// upload the data
Buffer::Data(se::Array(), 4*3, data);
// setup the vertex attribs array for the normals
prog_norm.Use();
VertexAttribArray attr(prog_norm, "Normal");
attr.Setup<Vec3f>();
attr.Enable();
}
VertexArray::Unbind();
Vec3f lightPos(2.0f, 2.0f, 3.0f);
prog_norm.Use();
SetUniform(prog_norm, "LightPos", lightPos);
prog_refl.Use();
SetUniform(prog_refl, "LightPos", lightPos);
//
gl.ClearColor(0.2f, 0.2f, 0.2f, 0.0f);
gl.ClearDepth(1.0f);
gl.ClearStencil(0);
}
CubeExample(void)
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"in vec4 Position;"
"in vec2 TexCoord;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" vertTexCoord = TexCoord;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" Position;"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float i = ("
" 1 +"
" int(vertTexCoord.x*8) % 2+"
" int(vertTexCoord.y*8) % 2"
" ) % 2;"
" 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();
// 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();
}
// bind the VBO for the cube texture-coordinates
texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.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();
}
//
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
LandscapeExample(void)
: grid_side(8)
, make_plane(
Vec3f(0.0f, 0.0f, 0.0f),
Vec3f(1.0f, 0.0f, 0.0f),
Vec3f(0.0f, 0.0f,-1.0f),
grid_side, grid_side
), plane_instr(make_plane.Instructions())
, plane_indices(make_plane.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, vc_int(prog, "vc_int")
, gc_int(prog, "gc_int")
, fc_int(prog, "fc_int")
{
VertexShader vs;
vs.Source(StrLit(
"#version 420\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"layout(binding = 0, offset = 0) uniform atomic_uint vc;"
"const float mult = 1.0/128.0;"
"uniform float vc_int;"
"in vec4 Position;"
"out vec3 vertColor;"
"void main(void)"
"{"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" Position;"
" vertColor = vec3("
" fract(atomicCounterIncrement(vc)*mult),"
" 0.0,"
" 0.0 "
" )*max(vc_int, 0.0);"
"}"
));
vs.Compile();
prog.AttachShader(vs);
GeometryShader gs;
gs.Source(StrLit(
"#version 420\n"
"layout (triangles) in;"
"layout (triangle_strip, max_vertices = 3) out;"
"layout(binding = 0, offset = 4) uniform atomic_uint gc;"
"const float mult = 1.0/128.0;"
"uniform float gc_int;"
"in vec3 vertColor[3];"
"out vec3 geomColor;"
"void main(void)"
"{"
" vec3 Color = vec3("
" 0.0,"
" fract(atomicCounterIncrement(gc)*mult),"
" 0.0 "
" )*max(gc_int, 0.0);"
" for(int v=0; v!=3; ++v)"
" {"
" gl_Position = gl_in[v].gl_Position;"
" geomColor = vertColor[v] + Color;"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
));
gs.Compile();
prog.AttachShader(gs);
FragmentShader fs;
fs.Source(StrLit(
"#version 420\n"
"layout(binding = 0, offset = 8) uniform atomic_uint fc;"
"const float mult = 1.0/4096.0;"
"uniform float fc_int;"
"in vec3 geomColor;"
"out vec3 fragColor;"
"void main(void)"
"{"
" vec3 Color = vec3("
" 0.0,"
" 0.0,"
" sqrt(fract(atomicCounterIncrement(fc)*mult))"
" )*max(fc_int, 0.0);"
" fragColor = geomColor + Color;"
"}"
));
fs.Compile();
prog.AttachShader(fs);
prog.Link();
prog.Use();
// bind the VAO for the plane
plane.Bind();
// bind the VBO for the plane vertices
positions.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_plane.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<GLfloat>(n_per_vertex);
attr.Enable();
}
counters.Bind(Buffer::Target::AtomicCounter);
{
const GLuint tmp[3] = {0u, 0u, 0u};
Buffer::Data(
Buffer::Target::AtomicCounter,
3, tmp,
BufferUsage::DynamicDraw
);
}
counters.BindBase(Buffer::IndexedTarget::AtomicCounter, 0);
gl.ClearColor(0.2f, 0.2f, 0.2f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
plane.Bind();
}
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);
VertexAttribArray 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
VertexAttribArray 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
VertexAttribArray 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);
}
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<GLfloat>(n_per_vertex);
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<GLfloat>(n_per_vertex);
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<GLfloat>(n_per_vertex);
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);
}
HaloExample(void)
: make_shape()
, shape_indices(make_shape.Indices())
, shape_instr(make_shape.Instructions())
, vs_shape(ObjectDesc("Shape VS"))
, vs_plane(ObjectDesc("Plane VS"))
, fs_shape(ObjectDesc("Shape FS"))
, fs_plane(ObjectDesc("Plane FS"))
, vs_halo(ObjectDesc("Halo VS"))
, gs_halo(ObjectDesc("Halo GS"))
, fs_halo(ObjectDesc("Halo FS"))
, shape_projection_matrix(shape_prog, "ProjectionMatrix")
, shape_camera_matrix(shape_prog, "CameraMatrix")
, shape_model_matrix(shape_prog, "ModelMatrix")
, plane_projection_matrix(plane_prog, "ProjectionMatrix")
, plane_camera_matrix(plane_prog, "CameraMatrix")
, halo_projection_matrix(halo_prog, "ProjectionMatrix")
, halo_camera_matrix(halo_prog, "CameraMatrix")
, halo_model_matrix(halo_prog, "ModelMatrix")
{
vs_shape.Source(
"#version 140\n"
"in vec4 Position;"
"in vec3 Normal;"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"uniform vec3 LightPos;"
"out vec3 vertNormal;"
"out vec3 vertViewNormal;"
"out vec3 vertLight;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertViewNormal = mat3(CameraMatrix)*vertNormal;"
" vertLight = LightPos - gl_Position.xyz;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
);
vs_shape.Compile();
fs_shape.Source(
"#version 140\n"
"in vec3 vertNormal;"
"in vec3 vertViewNormal;"
"in vec3 vertLight;"
"uniform mat4 CameraMatrix;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float ltlen = sqrt(length(vertLight));"
" float ltexp = dot("
" normalize(vertNormal),"
" normalize(vertLight)"
" );"
" float lview = dot("
" normalize(vertLight),"
" normalize(vec3("
" CameraMatrix[0][2],"
" CameraMatrix[1][2],"
" CameraMatrix[2][2] "
" ))"
" );"
" float depth = normalize(vertViewNormal).z;"
" vec3 ftrefl = vec3(0.9, 0.8, 0.7);"
" vec3 scatter = vec3(0.9, 0.6, 0.1);"
" vec3 bklt = vec3(0.8, 0.6, 0.4);"
" vec3 ambient = vec3(0.5, 0.4, 0.3);"
" fragColor = vec4("
" pow(max(ltexp, 0.0), 8.0)*ftrefl+"
" ( ltexp+1.0)/ltlen*pow(depth,2.0)*scatter+"
" (-ltexp+1.0)/ltlen*(1.0-depth)*scatter+"
" (-lview+1.0)*0.6*(1.0-abs(depth))*bklt+"
" 0.2*ambient,"
" 1.0"
" );"
"}"
);
fs_shape.Compile();
shape_prog.AttachShader(vs_shape);
shape_prog.AttachShader(fs_shape);
shape_prog.Link();
vs_plane.Source(
"#version 140\n"
"in vec4 Position;"
"in vec3 Normal;"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"uniform vec3 LightPos;"
"out vec3 vertNormal;"
"out vec3 vertLight;"
"void main(void)"
"{"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" Position;"
" vertNormal = Normal;"
" vertLight = LightPos-Position.xyz;"
"}"
);
vs_plane.Compile();
fs_plane.Source(
"#version 140\n"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float l = sqrt(length(vertLight));"
" float e = dot("
" vertNormal,"
" normalize(vertLight)"
" );"
" float d = l > 0.0 ? e / l : 0.0;"
" float i = 0.2 + 2.5 * d;"
" fragColor = vec4(0.8*i, 0.7*i, 0.4*i, 1.0);"
"}"
);
fs_plane.Compile();
plane_prog.AttachShader(vs_plane);
plane_prog.AttachShader(fs_plane);
plane_prog.Link();
vs_halo.Source(
"#version 150\n"
"in vec4 Position;"
"in vec3 Normal;"
"uniform mat4 ModelMatrix, CameraMatrix;"
"out vec3 vertNormal;"
"out float vd;"
"void main(void)"
"{"
" gl_Position = "
" CameraMatrix *"
" ModelMatrix *"
" Position;"
" vertNormal = ("
" CameraMatrix *"
" ModelMatrix *"
" vec4(Normal, 0.0)"
" ).xyz;"
" vd = vertNormal.z;"
"}"
);
vs_halo.Compile();
gs_halo.Source(
"#version 150\n"
"layout(triangles) in;"
"layout(triangle_strip, max_vertices = 12) out;"
"in vec3 vertNormal[];"
"in float vd[];"
"uniform mat4 CameraMatrix, ProjectionMatrix;"
"uniform vec3 LightPos;"
"out float geomAlpha;"
"void main(void)"
"{"
" for(int v=0; v!=3; ++v)"
" {"
" int a = v, b = (v+1)%3, c = (v+2)%3;"
" vec4 pa = gl_in[a].gl_Position;"
" vec4 pb = gl_in[b].gl_Position;"
" vec4 pc = gl_in[c].gl_Position;"
" vec4 px, py;"
" vec3 na = vertNormal[a];"
" vec3 nb = vertNormal[b];"
" vec3 nc = vertNormal[c];"
" vec3 nx, ny;"
" if(vd[a] == 0.0 && vd[b] == 0.0)"
" {"
" px = pa;"
" nx = na;"
" py = pb;"
" ny = nb;"
" }"
" else if(vd[a] > 0.0 && vd[b] < 0.0)"
" {"
" float x = vd[a]/(vd[a]-vd[b]);"
" float y;"
" px = mix(pa, pb, x);"
" nx = mix(na, nb, x);"
" if(vd[c] < 0.0)"
" {"
" y = vd[a]/(vd[a]-vd[c]);"
" py = mix(pa, pc, y);"
" ny = mix(na, nc, y);"
" }"
" else"
" {"
" y = vd[c]/(vd[c]-vd[b]);"
" py = mix(pc, pb, y);"
" ny = mix(nc, nb, y);"
" }"
" }"
" else continue;"
" vec4 gx1 = vec4(px.xyz, 1.0);"
" vec4 gy1 = vec4(py.xyz, 1.0);"
" vec4 gx2 = vec4(px.xyz + nx*0.3, 1.0);"
" vec4 gy2 = vec4(py.xyz + ny*0.3, 1.0);"
" gl_Position = ProjectionMatrix * gy1;"
" geomAlpha = 1.0;"
" EmitVertex();"
" gl_Position = ProjectionMatrix * gx1;"
" geomAlpha = 1.0;"
" EmitVertex();"
" gl_Position = ProjectionMatrix * gy2;"
" geomAlpha = 0.0;"
" EmitVertex();"
" gl_Position = ProjectionMatrix * gx2;"
" geomAlpha = 0.0;"
" EmitVertex();"
" EndPrimitive();"
" break;"
" }"
"}"
);
gs_halo.Compile();
fs_halo.Source(
"#version 150\n"
"in float geomAlpha;"
"out vec4 fragColor;"
"void main(void)"
"{"
" fragColor = vec4("
" 0.5, 0.4, 0.3,"
" pow(geomAlpha, 2.0)"
" );"
"}"
);
fs_halo.Compile();
halo_prog.AttachShader(vs_halo);
halo_prog.AttachShader(gs_halo);
halo_prog.AttachShader(fs_halo);
halo_prog.Link();
// bind the VAO for the shape
shape.Bind();
// bind the VBO for the shape vertices
shape_verts.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(VertexArrayAttrib::QueryCommonLocation(
MakeGroup(shape_prog, halo_prog),
"Position",
location
))
{
VertexArrayAttrib attr(location);
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
else OGLPLUS_ABORT("Inconsistent 'Position' location");
}
// bind the VBO for the shape normals
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();
VertexArrayAttrib attr(shape_prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// bind the VAO for the plane
plane.Bind();
// bind the VBO for the plane vertices
plane_verts.Bind(Buffer::Target::Array);
{
GLfloat data[4*3] = {
-9.0f, 0.0f, 9.0f,
-9.0f, 0.0f, -9.0f,
9.0f, 0.0f, 9.0f,
9.0f, 0.0f, -9.0f
};
Buffer::Data(Buffer::Target::Array, 4*3, data);
plane_prog.Use();
VertexArrayAttrib attr(plane_prog, "Position");
attr.Setup<Vec3f>();
attr.Enable();
}
// bind the VBO for the plane normals
plane_normals.Bind(Buffer::Target::Array);
{
GLfloat data[4*3] = {
-0.1f, 1.0f, 0.1f,
-0.1f, 1.0f, -0.1f,
0.1f, 1.0f, 0.1f,
0.1f, 1.0f, -0.1f
};
Buffer::Data(Buffer::Target::Array, 4*3, data);
plane_prog.Use();
VertexArrayAttrib attr(plane_prog, "Normal");
attr.Setup<Vec3f>();
attr.Enable();
}
Vec3f lightPos(2.0f, 2.5f, 9.0f);
ProgramUniform<Vec3f>(shape_prog, "LightPos").Set(lightPos);
ProgramUniform<Vec3f>(plane_prog, "LightPos").Set(lightPos);
gl.ClearColor(0.2f, 0.2f, 0.2f, 0.0f);
gl.ClearDepth(1.0f);
gl.ClearStencil(0);
gl.Enable(Capability::DepthTest);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::One);
}
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;"
"out vec3 vertNormal;"
"void main(void)"
"{"
" vertNormal = mat3(ModelMatrix)*Normal;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" ModelMatrix *"
" Position;"
"}"
).Compile();
// set the fragment shader source and compile it
fs.Source(
"#version 330\n"
"in vec3 vertNormal;"
"out vec4 fragColor;"
"uniform vec3 LightPos;"
"void main(void)"
"{"
" float intensity = 2.0 * max("
" dot(vertNormal, LightPos)/"
" length(LightPos),"
" 0.0"
" );"
" if(!gl_FrontFacing)"
" fragColor = vec4(0.0, 0.0, 0.0, 1.0);"
" else if(intensity > 0.9)"
" fragColor = vec4(1.0, 0.9, 0.8, 1.0);"
" else if(intensity > 0.1)"
" fragColor = vec4(0.7, 0.6, 0.4, 1.0);"
" else"
" fragColor = vec4(0.3, 0.2, 0.1, 1.0);"
"}"
).Compile();
// attach the shaders to the program
prog << vs << 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
(prog|"Position").Setup(n_per_vertex, DataType::Float).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
(prog|"Normal").Setup(n_per_vertex, DataType::Float).Enable();
}
//
// set the light position
(prog/"LightPos").Set(Vec3f(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);
glLineWidth(4.0f);
}
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 330\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 330\n"
"#extension ARB_tessellation_shader : enable\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 330\n"
"#extension ARB_tessellation_shader : enable\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 330\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 330\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<GLfloat>(n_per_vertex);
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();
}