static Program make(void)
{
Program prog;
VertexShader vs;
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"layout (std140) uniform OffsetBlock {vec3 Offset[16*16*16];};"
"in vec3 Position;"
"void main(void)"
"{"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" vec4(Position+Offset[gl_InstanceID], 1.0);"
"}"
).Compile();
FragmentShader fs;
fs.Source(
"#version 330\n"
"out float fragValue;"
"void main(void)"
"{"
" fragValue = 1.0/16.0;"
"}"
).Compile();
prog.AttachShader(vs).AttachShader(fs).Link().Use();
return std::move(prog);
}
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);
}
void ShaderManager<RS>::init()
{
//construct safe default shader
VertexShader<RS>* dv = 0;
FragmentShader<RS>* df = 0;
dv = new VertexShader<RS>();
df = new FragmentShader<RS>();
Vertex def;
def.addVector3("POSITION");
def.finalize();
dv->associateVertex(def);
if(RS == RS_DX11)
{
dv->initFromDef(Defaults::shaderDefDX, Defaults::vertexFunc);
df->initFromDef(Defaults::shaderDefDX, Defaults::fragmentFunc);
}
else
{
dv->initFromDef(Defaults::shaderDefGL, Defaults::vertexFunc);
df->initFromDef(Defaults::shaderDefGL, Defaults::fragmentFunc);
}
vShaders[Defaults::mapName][Defaults::mapName] = dv;
fShaders[Defaults::mapName][Defaults::mapName] = df;
}
static Program make(void)
{
Program prog;
VertexShader vs;
vs.Source(
"#version 330\n"
"uniform vec2 ScreenSize;"
"in vec4 Position;"
"in vec2 TexCoord;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = Position;"
" vertTexCoord = TexCoord*ScreenSize;"
"}"
).Compile();
FragmentShader fs;
fs.Source(
"#version 330\n"
"uniform sampler1D Palette;"
"uniform sampler2DRect Tex;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float Overdraw = texture(Tex, vertTexCoord).r;"
" fragColor = texture(Palette, Overdraw);"
"}"
).Compile();
prog.AttachShader(vs).AttachShader(fs).Link().Use();
return std::move(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);
}
// makes a fragment shader from the prologe, custom part and epilogue
static FragmentShader make_fs(StrCRef color_fs)
{
FragmentShader shader;
StrCRef source[3] = {fs_prologue(), color_fs, fs_epilogue()};
shader.Source(source);
shader.Compile();
return shader;
}
ShaderProgram::ShaderProgram(
const string &filename,
const VertexShader &vertexShader,
const FragmentShader &fragmentShader) : _name(filename), _handle(0), _linked(0)
{
try
{
if (vertexShader.fail()) throw std::runtime_error("Invalid vertex shader");
if (fragmentShader.fail()) throw std::runtime_error("Invalid fragment shader");
if (GLEW_VERSION_2_0)
{
// Create program and attach vertex and fragment shaders
_handle = glCreateProgram();
glAttachShader(_handle, vertexShader.handle());
glAttachShader(_handle, fragmentShader.handle());
// Perform link stage
glLinkProgram(_handle);
glGetProgramiv(_handle, GL_LINK_STATUS, &_linked);
// Validate program
glValidateProgram(_handle);
printInfoLog();
// Check for success
if (GL_FALSE == _linked)
throw std::runtime_error("Link stage failed");
}
else if (GLEW_VERSION_1_5)
{
// Create program and attach vertex and fragment shaders
_handle = glCreateProgramObjectARB();
glAttachObjectARB(_handle, vertexShader.handle());
glAttachObjectARB(_handle, fragmentShader.handle());
// Perform link stage
glLinkProgramARB(_handle);
glGetObjectParameterivARB(_handle, GL_OBJECT_LINK_STATUS_ARB, &_linked);
// Validate program
glValidateProgramARB(_handle);
printInfoLog();
// Check for success
if (GL_FALSE == _linked)
throw std::runtime_error("Link stage failed");
}
cout << "* Shader \"" << _name << "\" successfully linked" << endl;
}
catch (std::runtime_error &err)
{
cerr << "Error: Faild to create shader " << _name << endl;
cerr << "Reason: " << err.what() << endl;
}
}
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;
}
/**
* @brief
* Creates a fragment shader and sets the shader source code
*/
FragmentShader *ShaderLanguage::CreateFragmentShader(const String &sSourceCode, const String &sProfile, const String &sArguments, const String &sEntry)
{
// Create the fragment shader instance
FragmentShader *pFragmentShader = CreateFragmentShader();
// Set the fragment shader source code
if (pFragmentShader)
pFragmentShader->SetSourceCode(sSourceCode, sProfile, sArguments, sEntry);
// Return the created fragment shader instance
return pFragmentShader;
}
HRESULT DX9ShaderIncludeLoader::Open( D3DXINCLUDE_TYPE IncludeType, LPCSTR pFileName, LPCVOID pParentData, LPCVOID *ppData, UINT *pBytes )
{
ResourcesManager& resMgr = ResourcesManager::getInstance();
FragmentShader* res = resMgr.create< FragmentShader >( FilePath( pFileName ) );
const std::string& script = res->getScript();
*ppData = (LPCVOID)script.c_str();
*pBytes = script.length();
return S_OK;
}
ShaderProgram::ShaderProgram(const char *pFragmentFile, const char *pVertexFile)
{
Init();
FragmentShader *pFragmentShader = new FragmentShader(pFragmentFile);
VertexShader *pVertexShader = new VertexShader(pVertexFile);
SetFragmentShader(pFragmentShader);
SetVertexShader(pVertexShader);
pFragmentShader->Release();
pVertexShader->Release();
CreateProgram();
}
static oglplus::Program make_prog(void)
{
using namespace oglplus;
Program prog;
VertexShader vs;
vs.Source(
"#version 140\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"uniform vec3 LightPos;"
"in vec4 Position;"
"in vec3 Normal;"
"in vec2 TexCoord;"
"out vec3 vertNormal;"
"out vec3 vertLight;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" vertNormal = mat3(ModelMatrix)*Normal;"
" gl_Position = ModelMatrix * Position;"
" vertLight = LightPos - gl_Position.xyz;"
" vertTexCoord = TexCoord;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}"
).Compile();
FragmentShader fs;
fs.Source(
"#version 140\n"
"uniform sampler2D Checker;"
"in vec3 vertNormal;"
"in vec3 vertLight;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float d = dot(vertNormal, normalize(vertLight));"
" float i = 0.4 + 1.4*max(d, 0.0);"
" vec4 t = texture(Checker, vertTexCoord);"
" fragColor = vec4(t.rrr*i, 1.0);"
"}"
).Compile();
prog.AttachShader(vs).AttachShader(fs).Link().Use();
return prog;
}
UserInterface::UserInterface(float inRange) : mRange(inRange), mRatio(0.0f),
mMouseX(0.0f), mMouseY(0.0f), mMouseOverWidget(NULL),
mClickCandidate(NULL), mModelViewProjection(mMatrix)
{
if (mRange < 1.0f) mRange = 1.0f;
VertexShader vs;
const char* vertexShader =
"#version 120\n"
"uniform mat4 uMVPM;\n"
"attribute vec2 iPosition;\n"
"attribute vec2 iTexture;\n"
"varying vec2 vTexture;\n"
"void main(void)\n"
"{\n"
" vTexture = iTexture;\n"
" vec4 p = vec4(iPosition, 0.0, 1.0);\n"
" gl_Position = uMVPM * p;\n"
"}\n"
;
vs.loadFromBuffer(vertexShader);
FragmentShader fs;
const char* fragmentShader =
"#version 120\n"
"uniform sampler2D uTexture;\n"
"varying vec2 vTexture;\n"
"void main(void)\n"
"{\n"
" gl_FragColor = texture2D(uTexture, vTexture);\n"
"}\n"
;
fs.loadFromBuffer(fragmentShader);
mProgram.attachShader(vs);
mProgram.attachShader(fs);
mProgram.bindAttribLocation(0, "iVertex");
mProgram.bindAttribLocation(1, "iTexture");
mProgram.link();
mUniMVPM = mProgram.getUniformLocation("uMVPM");
mUniTexture = mProgram.getUniformLocation("uTexture");
glUniform1i(mUniTexture, 0);
}
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;
}
FragmentShader<RS>* ShaderManager<RS>::getFragmentShader(const String& file, const String& function)
{
FragmentShader<RS>* out = 0;
auto f = fShaders.find(file);
if(f != fShaders.end())
{
auto fn = (*f).second.find(function);
if(fn != (*f).second.end())
{
out = (*fn).second;
}
else
{
out = new FragmentShader<RS>();
try
{
out->Shader::init(file, function);
fShaders[file][function] = out;
}
catch(DeviceFailureException e)
{
LOG(e.what());
out->destroy();
out = fShaders[Defaults::mapName][Defaults::mapName];
}
}
}
else
{
fShaders[file] = HashMap<String,FragmentShader<RS>*>();
out = new FragmentShader<RS>();
try
{
out->Shader::init(file, function);
fShaders[file][function] = out;
}
catch(DeviceFailureException e)
{
LOG(e.what());
out->destroy();
out = fShaders[Defaults::mapName][Defaults::mapName];
}
}
return out;
}
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;
}
//-----------------------------------------------------------------------------------------------------------------------------------------------------
Ptr<GPUProgram> Context::CreateGPUProgram( LPCTSTR VertexShaderSource, LPCTSTR FragmentShaderSource )
{
VertexShader* pVertexShader = 0;
FragmentShader* pFragmentShader = 0;
if (VertexShaderSource)
{
pVertexShader = new VertexShader(this);
pVertexShader->Compile(VertexShaderSource);
}
if (FragmentShaderSource)
{
pFragmentShader = new FragmentShader(this);
pFragmentShader->Compile(FragmentShaderSource);
}
return CreateGPUProgram( pVertexShader, pFragmentShader );
}
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 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 * 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;
}
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);
}
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);
}
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);
}
static Program make(void)
{
VertexShader vs;
vs.Source(
"#version 150\n"
"uniform mat4 ModelMatrix;"
"uniform vec3 LightPosition;"
"uniform vec3 CameraPosition;"
"in vec4 Position;"
"out vec3 vertLightDir;"
"out vec3 vertViewDir;"
"void main(void)"
"{"
" gl_Position = ModelMatrix * Position;"
" vertLightDir = LightPosition - gl_Position.xyz;"
" vertViewDir = CameraPosition - gl_Position.xyz;"
"}"
).Compile();
GeometryShader gs;
gs.Source(
"#version 150\n"
"layout (triangles) in;"
"layout (triangle_strip, max_vertices=3) out;"
"uniform mat4 CameraMatrix;"
"in vec3 vertLightDir[3];"
"in vec3 vertViewDir[3];"
"out vec3 geomLightDir;"
"out vec3 geomViewDir;"
"out vec3 geomNormal;"
"void main(void)"
"{"
" geomNormal = 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 "
" )"
" );"
" for(int v=0; v!=3; ++v)"
" {"
" gl_Position = CameraMatrix * gl_in[v].gl_Position;"
" geomLightDir = vertLightDir[v];"
" geomViewDir = vertViewDir[v];"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
).Compile();
FragmentShader fs;
fs.Source(
"#version 150\n"
"in vec3 geomLightDir;"
"in vec3 geomViewDir;"
"in vec3 geomNormal;"
"out vec4 fragColor;"
"void main(void)"
"{"
" vec3 Normal = normalize(geomNormal);"
" vec3 LightDir = normalize(geomLightDir);"
" vec3 LightRefl = reflect(-LightDir, Normal);"
" vec3 ViewDir = normalize(geomViewDir);"
" fragColor = vec4("
" clamp(dot(Normal, ViewDir), 0, 1),"
" clamp(dot(Normal, LightDir),0, 1),"
" clamp(dot(ViewDir, LightRefl), 0, 1),"
" gl_FragCoord.z"
" );"
"}"
).Compile();
Program prog(ObjectDesc("Data"));
prog << vs << gs << fs;
prog.Link().Use();
return std::move(prog);
}
static Program make(void)
{
VertexShader vs;
vs.Source(
"#version 150\n"
"in vec4 Position;"
"void main(void)"
"{"
" gl_Position = Position;"
"}"
).Compile();
FragmentShader fs;
fs.Source(
"#version 150\n"
"uniform sampler2DRect DataMap;"
"uniform float Slider;"
"uniform vec2 SampleOffs[32];"
"const int NSamples = 32;"
"const float InvNSam = 1.0 / NSamples;"
"in vec4 gl_FragCoord;"
"out vec3 fragColor;"
"void main(void)"
"{"
" vec4 FData = texture(DataMap, gl_FragCoord.xy);"
" float Mask = ceil(FData.w);"
" float Ambi = 1;"
" float View = FData.x;"
" float Diff = FData.y;"
" float Spec = pow(FData.z, 8.0);"
" float SampleSpread = mix(16, 8, FData.w);"
" float SSAO = 0.0;"
" for(int s=0; s!=NSamples; ++s)"
" {"
" vec2 SampleCoord = gl_FragCoord.xy+SampleSpread*SampleOffs[s];"
" vec4 SData = texture(DataMap, SampleCoord);"
" float x = (FData.w - SData.w)*16.0;"
" float y = View*x*exp(1-abs(x))*min(exp(x), 1.0);"
" SSAO += max(1.0-y*2.0, 0.0);"
" }"
" SSAO *= InvNSam;"
" if(gl_FragCoord.x < Slider) SSAO = 1.0;"
" Ambi *= (0.00+0.30*SSAO);"
" Diff *= (0.05+0.40*SSAO);"
" Spec *= (0.05+0.60*SSAO);"
" float Sl = int(gl_FragCoord.x) == int(Slider)?1:0;"
" vec3 Color = vec3(0.9, 0.8, 0.3)*(Ambi+Diff)+vec3(Spec);"
" vec3 BgColor = vec3(0.2);"
" vec3 SlColor = vec3(1.0);"
" fragColor = mix(mix(BgColor, Color, Mask), SlColor, Sl);"
"}"
).Compile();
Program prog(ObjectDesc("Draw"));
prog << vs << fs;
prog.Link().Use();
return std::move(prog);
}