void Reshape(GLuint vp_width, GLuint vp_height) {
width = vp_width;
height = vp_height;
float aspect = float(width) / height;
auto projection = CamMatrixf::PerspectiveX(Degrees(60), aspect, 1, 20);
plane_projection_matrix.Set(projection);
shape_projection_matrix.Set(projection);
gl.Bound(Texture::Target::Rectangle, depth_tex)
.Image2D(
0,
PixelDataInternalFormat::DepthComponent,
width / tex_size_div,
height / tex_size_div,
0,
PixelDataFormat::DepthComponent,
PixelDataType::Float,
nullptr);
gl.Bound(Texture::Target::Rectangle, reflect_tex)
.Image2D(
0,
PixelDataInternalFormat::RGB,
width / tex_size_div,
height / tex_size_div,
0,
PixelDataFormat::RGB,
PixelDataType::UnsignedByte,
nullptr);
}
Particles(GLuint n)
: count(n)
, sort_nw(n)
{
Context gl;
const GLfloat irm = 1.0f/RAND_MAX;
std::vector<GLfloat> pos_data(count*3);
for(GLuint p=0; p!=count; ++p)
{
for(GLuint c=0; c!=3; ++c)
{
pos_data[p*3+c] = 2.0f*(0.5f-std::rand()*irm);
}
}
gl.Bound(BufferTarget::Array, positions).Data(pos_data);
gl.Bound(BufferTarget::Uniform, distances).Data<GLfloat>(
count,
nullptr,
BufferUsage::DynamicDraw
);
gl.Bound(BufferTarget::CopyRead, indices_f).Data<GLuint>(
count,
nullptr,
BufferUsage::DynamicRead
);
gl.Bound(BufferTarget::CopyWrite,indices_d).Data<GLuint>(
count,
nullptr,
BufferUsage::DynamicDraw
);
}
BlobExample(const ExampleParams& params)
: blob_prog()
, metal_prog()
, grid(blob_prog, params.quality)
, plane(metal_prog) {
std::srand(234);
for(GLuint i = 0; i != 24; ++i) {
GLuint j = 0, n = 3 + std::rand() % 3;
std::vector<Vec4f> points(n);
GLfloat ball_size = 0.15f * std::rand() / GLfloat(RAND_MAX) + 0.25f;
while(j != n) {
points[j] = Vec4f(
1.2f * std::rand() / GLfloat(RAND_MAX) - 0.6f,
1.2f * std::rand() / GLfloat(RAND_MAX) - 0.6f,
1.2f * std::rand() / GLfloat(RAND_MAX) - 0.6f,
ball_size);
++j;
}
ball_paths.push_back(CubicBezierLoop<Vec4f, double>(points));
}
//
Texture::Active(1);
blob_prog.metaballs.Set(1);
gl.Bound(Texture::Target::_1D, metaballs_tex)
.Filter(TextureFilter::Nearest)
.Wrap(TextureWrap::ClampToEdge)
.Image1D(
0,
PixelDataInternalFormat::RGBA32F,
ball_paths.size(),
0,
PixelDataFormat::RGBA,
PixelDataType::Float,
nullptr);
Texture::Active(2);
metal_prog.metal_tex.Set(2);
gl.Bound(Texture::Target::_2D, metal_tex)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.Wrap(TextureWrap::Repeat)
.Image2D(images::BrushedMetalUByte(512, 512, 5120, -3, +3, 32, 128))
.GenerateMipmap();
const Vec3f light_position(12.0, 1.0, 8.0);
blob_prog.light_position.Set(light_position);
metal_prog.light_position.Set(light_position);
gl.ClearColor(0.8f, 0.7f, 0.6f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(FaceOrientation::CW);
gl.CullFace(Face::Back);
}
ParallaxExample()
: prog(make_prog())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, camera_position(prog, "CameraPosition")
, light_position(prog, "LightPosition")
, shape(
List("Position")("TexCoord").Get(),
shapes::Plane(
Vec3f(),
Vec3f(1.0f, 0.0f, 0.0f),
Vec3f(0.0f, 0.0f, -1.0f),
32,
32)) {
shape.UseInProgram(prog);
auto tex_image = images::LoadTexture("stones_color_hmap");
Texture::Active(0);
try {
UniformSampler(prog, "ColorMap").Set(0);
gl.Bound(Texture::Target::_2D, color_tex)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(tex_image)
.GenerateMipmap();
} catch(Error&) {
}
Texture::Active(1);
try {
UniformSampler(prog, "BumpMap").Set(1);
gl.Bound(Texture::Target::_2D, bump_tex)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(
images::NormalMap(tex_image, images::NormalMap::FromAlpha()))
.GenerateMipmap();
} catch(Error&) {
}
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
(Capability::DepthTest) << true;
(Capability::CullFace) << false;
(Functionality::ClipDistance | 0) << true;
(Functionality::ClipDistance | 1) << true;
(Functionality::ClipDistance | 2) << true;
}
void ShadowMapRenderer::SetupFramebuffers(const unsigned &w,
const unsigned &h)
{
using namespace oglplus;
static Context gl;
// save size
shadowMapSize = glm::uvec2(w, h);
// setup shadow framebuffer
shadowFramebuffer.Bind(FramebufferTarget::Draw);
// create render buffer for depth testing
depthRender.Bind(RenderbufferTarget::Renderbuffer);
depthRender.Storage(RenderbufferTarget::Renderbuffer,
PixelDataInternalFormat::DepthComponent24, w, h);
// create variance shadow mapping texture, z and z * z
gl.Bound(TextureTarget::_2D, shadowMap)
.Image2D(0, PixelDataInternalFormat::RGBA32F, w, h, 0,
PixelDataFormat::RGBA, PixelDataType::Float, nullptr);
Filtering(filtering);
Anisotropy(8);
shadowFramebuffer.AttachColorTexture(FramebufferTarget::Draw, 0, shadowMap, 0);
shadowFramebuffer.AttachRenderbuffer(FramebufferTarget::Draw,
FramebufferAttachment::Depth,
depthRender);
gl.DrawBuffer(FramebufferColorAttachment::_0);
// check if success building frame buffer
if (!Framebuffer::IsComplete(FramebufferTarget::Draw))
{
auto status = Framebuffer::Status(FramebufferTarget::Draw);
Framebuffer::HandleIncompleteError(FramebufferTarget::Draw, status);
}
Framebuffer::Bind(Framebuffer::Target::Draw, FramebufferName(0));
// setup shadow blur framebuffer
blurFramebuffer.Bind(FramebufferTarget::Draw);
// create variance shadow mapping texture, z and z * z
gl.Bound(TextureTarget::_2D, blurShadow)
.Image2D(0, PixelDataInternalFormat::RGBA32F, w, h, 0,
PixelDataFormat::RGBA, PixelDataType::Float, nullptr)
.MinFilter(TextureMinFilter::Linear).MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToEdge).WrapT(TextureWrap::ClampToEdge).Anisotropy(8);
blurFramebuffer.AttachColorTexture(FramebufferTarget::Draw, 0, blurShadow, 0);
gl.DrawBuffer(FramebufferColorAttachment::_0);
// check if success building frame buffer
if (!Framebuffer::IsComplete(FramebufferTarget::Draw))
{
auto status = Framebuffer::Status(FramebufferTarget::Draw);
Framebuffer::HandleIncompleteError(FramebufferTarget::Draw, status);
}
Framebuffer::Bind(Framebuffer::Target::Draw, FramebufferName(0));
}
ParallaxMapExample()
: prog(make())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
, camera_position(prog, "CameraPosition")
, light_position(prog, "LightPosition")
, shape(
List("Position")("Normal")("Tangent")("TexCoord").Get(),
shapes::Torus(1.0f, 0.5, 72, 48)) {
shape.UseInProgram(prog);
auto tex_image = images::LoadTexture("bricks_color_hmap");
Texture::Active(0);
try {
UniformSampler(prog, "ColorMap").Set(0);
gl.Bound(Texture::Target::_2D, color_tex)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(tex_image)
.GenerateMipmap();
} catch(Error&) {
}
Texture::Active(1);
try {
UniformSampler(prog, "BumpMap").Set(1);
gl.Bound(Texture::Target::_2D, bump_tex)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(
images::NormalMap(tex_image, images::NormalMap::FromAlpha()))
.GenerateMipmap();
} catch(Error&) {
}
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Disable(Capability::CullFace);
gl.Enable(Functionality::ClipDistance, 0);
gl.Enable(Functionality::ClipDistance, 1);
gl.Enable(Functionality::ClipDistance, 2);
}
LiquidExample(const ExampleParams& params)
: liquid_prog()
, grid(liquid_prog, params.quality)
, grid_repeat(int(1 + params.quality*2))
{
Texture::Active(1);
{
auto image = images::Squares(512, 512, 0.9f, 8, 8);
auto bound_tex = gl.Bound(Texture::Target::CubeMap, env_map);
for(int i=0; i!=6; ++i)
Texture::ImageCM(i, image);
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::ClampToEdge);
bound_tex.WrapT(TextureWrap::ClampToEdge);
bound_tex.WrapR(TextureWrap::ClampToEdge);
bound_tex.SwizzleG(TextureSwizzle::Red);
bound_tex.SwizzleB(TextureSwizzle::Red);
}
ProgramUniformSampler(liquid_prog, "EnvMap").Set(1);
const Vec3f light_position(12.0, 1.0, 8.0);
liquid_prog.light_position.Set(light_position);
gl.ClearColor(0.7f, 0.65f, 0.55f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(FaceOrientation::CW);
gl.CullFace(Face::Back);
}
llvm_value CompileExpression::DoName(Name *what)
// ----------------------------------------------------------------------------
// Compile a name
// ----------------------------------------------------------------------------
{
Prefix_p where;
Infix_p rewrite;
Context *context = unit->context;
Tree *existing = context->Bound(what, true, &rewrite, &where);
assert(existing || !"Type checking didn't realize a name is missing");
Tree *from = RewriteDefined(rewrite->left);
if (where == context->CurrentScope())
if (llvm_value result = unit->Known(from))
return result;
// Check true and false values
if (existing == eliot_true)
return ConstantInt::get(unit->compiler->booleanTy, 1);
if (existing == eliot_false)
return ConstantInt::get(unit->compiler->booleanTy, 0);
// Check if it is a global
if (llvm_value global = unit->Global(existing))
return global;
if (llvm_value global = unit->Global(from))
return global;
// If we are in a context building a closure, record dependency
if (unit->closureTy)
return unit->NeedClosure(from);
return DoCall(what);
}
llvm_value CompileExpression::DoName(Name *what)
// ----------------------------------------------------------------------------
// Compile a name
// ----------------------------------------------------------------------------
{
Context_p where;
Rewrite_p rewrite;
Context *context = unit->context;
Tree *existing = context->Bound(what, Context::SCOPE_LOOKUP,
&where, &rewrite);
assert(existing || !"Type checking didn't realize a name is missing");
if (where == context)
if (llvm_value result = unit->Known(rewrite->from))
return result;
// Check true and false values
if (existing == xl_true)
return ConstantInt::get(unit->compiler->booleanTy, 1);
if (existing == xl_false)
return ConstantInt::get(unit->compiler->booleanTy, 0);
// Check if it is a global
if (llvm_value global = unit->Global(existing))
return global;
// If we are in a context building a closure, record dependency
if (unit->closureTy)
return unit->NeedClosure(rewrite->from);
return DoCall(what);
}
void ShadowMapRenderer::Anisotropy(const int &val) const
{
using namespace oglplus;
static Context gl;
gl.Bound(TextureTarget::_2D, shadowMap)
.Anisotropy(static_cast<float>(val));
}
FBTexThread(FBTexExample& example)
: gl()
, prog(make_prog(example))
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
, shape(List("Position")("Normal")("TexCoord").Get(), shapes::TwistedTorus(), prog)
, tex_side(512)
, parent_ready(example.parent_ready)
{
example.thread_ready = &thread_ready;
Uniform<Vec3f>(prog, "LightPos").Set(20.0f, 30.0f, 40.0f);
Texture::Active(0);
gl.Bound(Texture::Target::_2D, example.tex)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(
0,
PixelDataInternalFormat::RGBA,
tex_side, tex_side,
0,
PixelDataFormat::RGBA,
PixelDataType::UnsignedByte,
nullptr
);
gl.Bound(Renderbuffer::Target::Renderbuffer, rbo)
.Storage(
PixelDataInternalFormat::DepthComponent,
tex_side,
tex_side
);
gl.Bound(Framebuffer::Target::Draw, fbo)
.AttachTexture(FramebufferAttachment::Color, example.tex, 0)
.AttachRenderbuffer(FramebufferAttachment::Depth, rbo);
Use();
}
SortNWTex(GLuint n)
{
images::Image sort_nw_map = images::SortNWMap(n);
pass_count = sort_nw_map.Height();
Context gl;
Texture::Active(0);
gl.Bound(TextureTarget::Rectangle, self())
.Filter(TextureFilter::Nearest)
.WrapS(TextureWrap::ClampToEdge)
.WrapT(TextureWrap::ClampToEdge)
.Image2D(sort_nw_map);
}
void ShadowMapRenderer::Filtering(const int &val)
{
using namespace oglplus;
static Context gl;
filtering = glm::clamp(val, 0, 2);
if(filtering == 0)
gl.Bound(TextureTarget::_2D, shadowMap)
.MagFilter(TextureMagFilter::Nearest)
.MinFilter(TextureMinFilter::Nearest);
if(filtering == 1)
gl.Bound(TextureTarget::_2D, shadowMap)
.MagFilter(TextureMagFilter::Linear)
.MinFilter(TextureMinFilter::Linear);
if(filtering == 2)
gl.Bound(TextureTarget::_2D, shadowMap)
.MagFilter(TextureMagFilter::Linear)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.GenerateMipmap();
}
void UpdateMetaballs(double time) {
std::size_t metaball_count = ball_paths.size(), k = 0;
std::vector<GLfloat> metaballs(metaball_count * 4);
for(std::size_t ball = 0; ball != metaball_count; ++ball) {
Vec4f pos = ball_paths[ball].Position(time / 21.0);
for(GLuint coord = 0; coord != 4; ++coord)
metaballs[k++] = pos.At(coord);
}
gl.Bound(Texture::Target::_1D, metaballs_tex)
.Image1D(
0,
PixelDataInternalFormat::RGBA32F,
metaball_count,
0,
PixelDataFormat::RGBA,
PixelDataType::Float,
metaballs.data());
}
CubeExample(void)
: cube(
List("Position")("Normal")("TexCoord").Get(),
shapes::Cube(),
cube_prog
)
{
// setup the texture
{
GLuint tex_side = 512;
auto image = images::NewtonFractal(
tex_side, tex_side,
Vec3f(0.2f, 0.1f, 0.4f),
Vec3f(0.8f, 0.8f, 1.0f),
Vec2f(-1.0f, -1.0f),
Vec2f( 1.0f, 1.0f),
images::NewtonFractal::X4Minus1(),
images::NewtonFractal::DefaultMixer()
);
gl.Bound(Texture::Target::_2D, cube_tex)
.Image2D(image)
.GenerateMipmap()
.BorderColor(Vec4f(0.8f, 0.8f, 1.0f, 1.0f))
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat);
}
cube_prog.cube_tex = 0;
cube_prog.light_position.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.CullFace(Face::Back);
}
CubeExample()
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
, prog(make())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
, light_pos(prog, "LightPos") {
// bind the VAO for the cube
gl.Bind(cube);
gl.Bind(Buffer::Target::Array, verts);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
(prog | "Position").Setup<GLfloat>(n_per_vertex).Enable();
}
gl.Bind(Buffer::Target::Array, normals);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
(prog | "Normal").Setup<GLfloat>(n_per_vertex).Enable();
}
gl.Bind(Buffer::Target::Array, tangents);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Tangents(data);
Buffer::Data(Buffer::Target::Array, data);
(prog | "Tangent").Setup<GLfloat>(n_per_vertex).Enable();
}
gl.Bind(Buffer::Target::Array, texcoords);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
(prog | "TexCoord").Setup<GLfloat>(n_per_vertex).Enable();
}
{
auto img = images::SphereBumpMap(512, 512, 2, 2);
Uniform<GLsizei>(prog, "BumpTexWidth").Set(img.Width());
Uniform<GLsizei>(prog, "BumpTexHeight").Set(img.Height());
UniformSampler(prog, "BumpTex").Set(0);
Texture::Active(0);
gl.Bound(Texture::Target::_2D, bumpTex)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(img)
.GenerateMipmap();
}
//
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_cube.FaceWinding());
}
SkyBoxExample()
: sky_box(List("Position").Get(), shapes::SkyBox())
, shape(List("Position")("Normal").Get(), shapes::WickerTorus())
, sky_box_prog()
, sky_box_projection_matrix(sky_box_prog, "ProjectionMatrix")
, sky_box_camera_matrix(sky_box_prog, "CameraMatrix")
, shape_projection_matrix(shape_prog, "ProjectionMatrix")
, shape_camera_matrix(shape_prog, "CameraMatrix")
, shape_model_matrix(shape_prog, "ModelMatrix")
, sky_box_sun_position(sky_box_prog, "SunPosition")
, shape_sun_position(shape_prog, "SunPosition")
, shape_camera_position(shape_prog, "CameraPosition") {
VertexShader sky_box_vs;
sky_box_vs.Source(
"#version 140\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"mat4 Matrix = ProjectionMatrix*CameraMatrix;"
"in vec3 Position;"
"out vec3 vertTexCoord;"
"void main()"
"{"
" gl_Position = Matrix * vec4(Position * 100.0, 1.0);"
" vertTexCoord = Position;"
"}");
sky_box_vs.Compile();
sky_box_prog.AttachShader(sky_box_vs);
VertexShader shape_vs;
shape_vs.Source(
"#version 140\n"
"uniform vec3 SunPosition;"
"uniform vec3 CameraPosition;"
"uniform mat4 ProjectionMatrix,CameraMatrix,ModelMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal, vertViewRefl, vertLightDir;"
"void main()"
"{"
" gl_Position = ModelMatrix * Position;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertViewRefl = reflect("
" gl_Position.xyz - CameraPosition,"
" vertNormal"
" );"
" vertLightDir = SunPosition - gl_Position.xyz;"
" gl_Position = ProjectionMatrix*CameraMatrix*gl_Position;"
"}");
shape_vs.Compile();
shape_prog.AttachShader(shape_vs);
FragmentShader sky_box_fs;
sky_box_fs.Source(
"#version 140\n"
"in vec3 vertTexCoord;"
"out vec3 fragColor;"
"vec3 sky_color(vec3 vd);"
"void main()"
"{"
" fragColor = sky_color(normalize(vertTexCoord));"
"}");
sky_box_fs.Compile();
sky_box_prog.AttachShader(sky_box_fs);
FragmentShader shape_fs;
shape_fs.Source(
"#version 140\n"
"in vec3 vertNormal, vertViewRefl, vertLightDir;"
"out vec3 fragColor;"
"vec3 sky_color(vec3 vd);"
"void main()"
"{"
" float l = max(dot(normalize(vertNormal), "
"normalize(vertLightDir))+0.1, 0.0);"
" float a = 0.1;"
" fragColor = "
" 0.1*vec3(1.0, 1.0, 1.0)*(a+l)+"
" 0.9*sky_color(normalize(vertViewRefl));"
"}");
shape_fs.Compile();
shape_prog.AttachShader(shape_fs);
FragmentShader sky_fs;
sky_fs.Source(
"#version 140\n"
"const float WorldRadius = 6371000;"
"const float AtmThickness = 50000;"
"const vec3 AirColor = vec3(0.32, 0.36, 0.45);"
"const vec3 LightColor = vec3(1.0, 1.0, 1.0);"
"uniform vec3 SunPosition;"
"uniform samplerCube EnvMap;"
"float atm_intersection(vec3 v)"
"{"
" const vec3 c = vec3(0.0, -WorldRadius, 0.0);"
" const float r = WorldRadius + AtmThickness;"
" const float c_c = dot(-c, -c);"
" float v_c = dot( v, -c);"
" return (-v_c + sqrt(v_c*v_c - c_c + r*r))/AtmThickness;"
"}"
"vec3 sky_color(vec3 vd)"
"{"
" vec3 up = vec3(0.0, 1.0, 0.0);"
" vec3 ld = normalize(SunPosition);"
" vec4 cl = texture(EnvMap, vd);"
" float ai = atm_intersection(vd);"
" float al = max(dot(ld, up) + 0.12, 0.0);"
" float vl = max(dot(vd, ld), 0.0);"
" float ct = (1.0-cl.a)*cl.b;"
" vec3 ac = max(LightColor-AirColor*pow(ai, 0.33), vec3(0.0, 0.0, "
"0.0));"
" vec3 Sun = "
" ac*(vl>0.995+0.004*al ? 1.0:0.0);"
" vec3 Air = "
" min(AirColor*sqrt(pow(al,0.25)*ai), vec3(al, al, al)*1.5)+"
" ac*pow(min(vl+0.001*ai, 1.0), 1024.0/pow(ai, 2.0))+"
" ac*(vl/(1.0+pow(3.0*al, 8.0)))*pow(ai, 0.6)*0.5;"
" vec3 Clouds ="
" ac*pow(min(vl*(cl.g+cl.b), 1.015), 64.0)*pow(ct, 2.0)+"
" ac*pow(min(vl*cl.g+cl.b, 1.020), 32.0)*ct+"
" ac*pow(min(vl*cl.g*cl.b, 1.010), 16.0)*pow(ct, 0.5)+"
" ac*0.7*min(cl.g + cl.b*0.5, 1.0)*al+"
" ac*(cl.g*(1.0-cl.b*0.2)*5.0)*pow(1.0-al, 2.0)*(al)+"
" LightColor*0.5*min(al + cl.g*0.4+cl.b*0.1, 1.0)*sqrt(al);"
" return mix(Air, Clouds, cl.a*(1.0-cl.r*0.8))+Sun*(1.0-cl.a);"
"}");
sky_fs.Compile();
sky_box_prog.AttachShader(sky_fs);
shape_prog.AttachShader(sky_fs);
sky_box_prog.Link();
sky_box.UseInProgram(sky_box_prog);
shape_prog.Link();
shape.UseInProgram(shape_prog);
{
ProgramUniformSampler(sky_box_prog, "EnvMap").Set(0);
ProgramUniformSampler(shape_prog, "EnvMap").Set(0);
Texture::Active(0);
gl.Bound(Texture::Target::CubeMap, env_map)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToEdge)
.WrapT(TextureWrap::ClampToEdge)
.WrapR(TextureWrap::ClampToEdge);
Texture::ImageCM(
0, images::LoadTexture("clouds01-cm_0", false, false));
Texture::ImageCM(
1, images::LoadTexture("clouds01-cm_1", false, false));
Texture::ImageCM(
2, images::LoadTexture("clouds01-cm_2", false, false));
Texture::ImageCM(
3, images::LoadTexture("clouds01-cm_3", false, false));
Texture::ImageCM(
4, images::LoadTexture("clouds01-cm_4", false, false));
Texture::ImageCM(
5, images::LoadTexture("clouds01-cm_5", false, false));
}
gl.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
MetaballExample(void)
{
for(GLuint i=0; i!=64; ++i)
{
GLuint j = 0, n = 3+std::rand()%3;
std::vector<Vec4f> points(n);
while(j != n)
{
points[j] = Vec4f(
1.4*std::rand()/GLdouble(RAND_MAX) - 0.7,
1.4*std::rand()/GLdouble(RAND_MAX) - 0.7,
0.0,
0.1*std::rand()/GLdouble(RAND_MAX) + 0.1
);
++j;
}
ball_paths.push_back(CubicBezierLoop<Vec4f, double>(points));
++i;
}
// Set the vertex shader source
vs.Source(
"#version 330\n"
"in vec2 Position;"
"out vec3 vertPosition;"
"void main(void)"
"{"
" vertPosition = vec3(Position, 0.0);"
" gl_Position = vec4(vertPosition, 1.0);"
"}"
);
// compile it
vs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"uniform sampler1D Metaballs;"
"in vec3 vertPosition;"
"out vec3 fragColor;"
"const vec3 AmbientColor = vec3(0.3, 0.4, 0.9);"
"const vec3 DiffuseColor = vec3(0.5, 0.6, 1.0);"
"const vec3 LightDir = normalize(vec3(1.0, 1.0, 1.0));"
"void main(void)"
"{"
" int i = 0, n = textureSize(Metaballs, 0);"
" float InvN = 1.0/n;"
" float Value = 0.0;"
" vec3 Normal = vec3(0.0, 0.0, 0.0);"
" while(i != n)"
" {"
" vec4 Metaball = texelFetch(Metaballs, i, 0);"
" float Radius = Metaball.w;"
" vec3 Vect = vertPosition - Metaball.xyz;"
" float Tmp = pow(Radius,2.0)/dot(Vect, Vect)-0.25;"
" Value += Tmp;"
" float Mul = max(Tmp, 0.0);"
" Normal += Mul*vec3(Vect.xy, Mul*InvN/Radius);"
" ++i;"
" }"
" if(Value > 0.0)"
" {"
" float Diffuse = 1.4*max(dot("
" LightDir,"
" normalize(Normal)"
" ), 0.0);"
" float Ambient = 0.3;"
" fragColor = "
" Ambient*AmbientColor+"
" Diffuse*DiffuseColor;"
" }"
" else fragColor = vec3(0.4, 0.4, 0.4);"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog << vs << fs;
// link and use it
prog.Link().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, rectangle_verts);
// setup the vertex attribs array for the vertices
VertexArrayAttrib vert_attr(prog, "Position");
vert_attr.Setup<Vec2f>().Enable();
//
Texture::Active(0);
UniformSampler(prog, "Metaballs").Set(0);
gl.Bound(Texture::Target::_1D, metaballs_tex)
.MinFilter(TextureMinFilter::Nearest)
.MagFilter(TextureMagFilter::Nearest)
.WrapS(TextureWrap::MirroredRepeat)
.Image1D(
0,
InternalFormat::RGBA32F,
ball_paths.size(),
0,
Format::RGBA,
DataType::Float,
nullptr
);
gl.Disable(Capability::DepthTest);
}
CubeExample(void)
: cube_instr(make_cube.Instructions())
, cube_indices(make_cube.Indices())
, prog(make_prog())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
{
// bind the VAO for the cube
gl.Bind(cube);
gl.Bind(Buffer::Target::Array, verts);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.Bind(Buffer::Target::Array, normals);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.Bind(Buffer::Target::Array, texcoords);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_cube.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(prog, "TexCoord");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// setup the texture
gl.Bound(Texture::Target::_2D, tex)
.Image2D(images::LoadTexture("honeycomb"))
.GenerateMipmap()
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::MirroredRepeat)
.WrapT(TextureWrap::MirroredRepeat)
.Anisotropy(2);
//
UniformSampler(prog, "TexUnit").Set(0);
Uniform<Vec3f>(prog, "LightPos").Set(Vec3f(1.0f, 2.0f, 3.0f));
//
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::Blend);
gl.BlendFunc(
BlendFn::SrcAlpha,
BlendFn::OneMinusSrcAlpha
);
gl.Enable(Capability::CullFace);
gl.FrontFace(make_cube.FaceWinding());
}
ReflectionExample()
: make_plane(
Vec3f(), Vec3f(3.0f, 0.0f, 0.0f), Vec3f(0.0f, 0.0f, -3.0f), 15, 15)
, plane_instr(make_plane.Instructions())
, plane_indices(make_plane.Indices())
, make_shape()
, shape_instr(make_shape.Instructions())
, shape_indices(make_shape.Indices())
, plane_vs(ObjectDesc("Plane vertex"))
, shape_vs(ObjectDesc("Shape vertex"))
, plane_fs(ObjectDesc("Plane fragment"))
, shape_fs(ObjectDesc("Shape fragment"))
, plane_projection_matrix(plane_prog)
, plane_camera_matrix(plane_prog)
, plane_model_matrix(plane_prog)
, shape_projection_matrix(shape_prog)
, shape_camera_matrix(shape_prog)
, shape_model_matrix(shape_prog)
, width(800)
, height(600)
, tex_size_div(2) {
plane_vs.Source(
"#version 140\n"
"uniform vec3 LightPosition;"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"out vec3 vertLightDir;"
"out vec4 vertTexCoord;"
"void main()"
"{"
" gl_Position = ModelMatrix*Position;"
" vertLightDir = LightPosition - gl_Position.xyz;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
" vertTexCoord = gl_Position;"
"}");
plane_vs.Compile();
plane_fs.Source(
"#version 140\n"
"uniform sampler2DRect ReflectTex;"
"uniform vec3 Normal;"
"in vec3 vertLightDir;"
"in vec4 vertTexCoord;"
"out vec3 fragColor;"
"const int n = 5;"
"const int ns = (n*n);"
"const float blur = 0.15/n;"
"void main()"
"{"
" float d = dot(Normal, normalize(vertLightDir));"
" float intensity = 0.5 + pow(1.4*d, 2.0);"
" vec3 color = vec3(0.0, 0.0, 0.0);"
" int n = 2;"
" float pct = 0.5/vertTexCoord.w;"
" for(int y=-n; y!=(n+1); ++y)"
" for(int x=-n; x!=(n+1); ++x)"
" {"
" vec2 coord = vertTexCoord.xy;"
" coord += vec2(blur*x, blur*y);"
" coord *= pct;"
" coord += vec2(0.5, 0.5);"
" coord *= textureSize(ReflectTex);"
" color += texture(ReflectTex, coord).rgb/ns;"
" }"
" fragColor = color*intensity;"
"}");
plane_fs.Compile();
plane_prog.AttachShader(plane_vs);
plane_prog.AttachShader(plane_fs);
plane_prog.Link();
plane_prog.Use();
plane_projection_matrix.BindTo("ProjectionMatrix");
plane_camera_matrix.BindTo("CameraMatrix");
plane_model_matrix.BindTo("ModelMatrix");
Vec3f lightPos(3.0f, 0.5f, 2.0f);
Uniform<Vec3f>(plane_prog, "LightPosition").Set(lightPos);
Uniform<Vec3f>(plane_prog, "Normal").Set(make_plane.Normal());
plane.Bind();
plane_verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_plane.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(plane_prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
//
Texture::Active(1);
gl.Bound(Texture::Target::Rectangle, depth_tex)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToEdge)
.WrapT(TextureWrap::ClampToEdge);
Texture::Active(0);
ProgramUniformSampler(plane_prog, "ReflectTex").Set(0);
gl.Bound(Texture::Target::Rectangle, reflect_tex)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToEdge)
.WrapT(TextureWrap::ClampToEdge);
gl.Bound(Framebuffer::Target::Draw, fbo)
.AttachTexture(FramebufferAttachment::Color, reflect_tex, 0)
.AttachTexture(FramebufferAttachment::Depth, depth_tex, 0);
shape_vs.Source(
"#version 140\n"
"uniform vec3 LightPosition;"
"uniform mat4 ProjectionMatrix, ModelMatrix, CameraMatrix;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal;"
"out vec3 vertLightDir;"
"out vec3 vertLightRefl;"
"out vec3 vertViewDir;"
"out vec3 vertColor;"
"void main()"
"{"
" gl_Position = ModelMatrix * Position;"
" vertLightDir = LightPosition - gl_Position.xyz;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLightRefl = reflect("
" -normalize(vertLightDir),"
" normalize(vertNormal)"
" );"
" vertViewDir = (vec4(0.0, 0.0, 1.0, 1.0)*CameraMatrix).xyz;"
" vertColor = vec3(1, 1, 1) - vertNormal;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
"}");
shape_vs.Compile();
shape_fs.Source(
"#version 140\n"
"in vec3 vertNormal;"
"in vec3 vertLightDir;"
"in vec3 vertLightRefl;"
"in vec3 vertViewDir;"
"in vec3 vertColor;"
"out vec3 fragColor;"
"void main()"
"{"
" float l = length(vertLightDir);"
" float d = dot("
" normalize(vertNormal), "
" normalize(vertLightDir)"
" ) / l;"
" float s = dot("
" normalize(vertLightRefl),"
" normalize(vertViewDir)"
" );"
" vec3 lt = vec3(1.0, 1.0, 1.0);"
" fragColor = "
" vertColor * 0.4 + "
" (lt + vertColor)*pow(max(2.5*d, 0.0), 3) + "
" lt * pow(max(s, 0.0), 64);"
"}");
shape_fs.Compile();
shape_prog.AttachShader(shape_vs);
shape_prog.AttachShader(shape_fs);
shape_prog.Link();
shape_prog.Use();
shape_projection_matrix.BindTo("ProjectionMatrix");
shape_camera_matrix.BindTo("CameraMatrix");
shape_model_matrix.BindTo("ModelMatrix");
Uniform<Vec3f>(shape_prog, "LightPosition").Set(lightPos);
shape.Bind();
shape_verts.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(shape_prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
shape_normals.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(shape_prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
//
gl.ClearColor(0.5f, 0.5f, 0.4f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
}
GlassExample(void)
: make_plane(Vec3f(2.0f, 0.0f, 0.0f), Vec3f(0.0f, 0.0f, -2.0f))
, plane_instr(make_plane.Instructions())
, plane_indices(make_plane.Indices())
, make_shape()
, shape_instr(make_shape.Instructions())
, shape_indices(make_shape.Indices())
, plane_vs(ObjectDesc("Plane vertex"))
, shape_vs(ObjectDesc("Shape vertex"))
, plane_fs(ObjectDesc("Plane fragment"))
, shape_fs(ObjectDesc("Shape fragment"))
, plane_proj_matrix(plane_prog)
, plane_camera_matrix(plane_prog)
, plane_model_matrix(plane_prog)
, shape_proj_matrix(shape_prog)
, shape_camera_matrix(shape_prog)
, shape_model_matrix(shape_prog)
, shape_clip_plane(shape_prog)
, shape_clip_direction(shape_prog)
, width(512)
, height(512)
, tex_side(512)
{
plane_vs.Source(
"#version 140\n"
"uniform vec3 LightPosition;"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec2 TexCoord;"
"out vec3 vertLightDir;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = "
" ModelMatrix* "
" Position;"
" vertLightDir = normalize("
" LightPosition - gl_Position.xyz"
" );"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" gl_Position;"
" vertTexCoord = TexCoord;"
"}"
);
plane_vs.Compile();
plane_fs.Source(
"#version 140\n"
"uniform vec3 Normal;"
"in vec3 vertLightDir;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float checker = ("
" int(vertTexCoord.x*18) % 2+"
" int(vertTexCoord.y*18) % 2"
" ) % 2;"
" vec3 color = mix("
" vec3(0.2, 0.4, 0.9),"
" vec3(0.2, 0.2, 0.7),"
" checker"
" );"
" float d = dot("
" Normal, "
" vertLightDir"
" );"
" float intensity = 0.5 + pow(1.4*d, 2.0);"
" fragColor = vec4(color*intensity, 1.0);"
"}"
);
plane_fs.Compile();
plane_prog.AttachShader(plane_vs);
plane_prog.AttachShader(plane_fs);
plane_prog.Link();
plane_prog.Use();
plane_proj_matrix.BindTo("ProjectionMatrix");
plane_camera_matrix.BindTo("CameraMatrix");
plane_model_matrix.BindTo("ModelMatrix");
Vec3f lightPos(3.0f, 3.0f, 3.0f);
Uniform<Vec3f>(plane_prog, "LightPosition").Set(lightPos);
Uniform<Vec3f>(plane_prog, "Normal").Set(make_plane.Normal());
gl.Bind(plane);
gl.Bind(Buffer::Target::Array, plane_verts);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_plane.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(plane_prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.Bind(Buffer::Target::Array, plane_texcoords);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_plane.TexCoordinates(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(plane_prog, "TexCoord");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
shape_vs.Source(
"#version 140\n"
"uniform vec3 LightPosition;"
"uniform mat4 ProjectionMatrix, ModelMatrix, CameraMatrix;"
"uniform vec4 ClipPlane;"
"uniform float ClipDirection;"
"in vec4 Position;"
"in vec3 Normal;"
"out vec3 vertNormal;"
"out vec3 vertLightDir;"
"out vec3 vertLightRefl;"
"out vec3 vertViewDir;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = "
" ModelMatrix *"
" Position;"
" gl_ClipDistance[0] = "
" ClipDirection* "
" dot(ClipPlane, gl_Position);"
" vertLightDir = LightPosition - gl_Position.xyz;"
" vertNormal = mat3(ModelMatrix)*Normal;"
" vertLightRefl = reflect("
" -normalize(vertLightDir),"
" normalize(vertNormal)"
" );"
" vertViewDir = (vec4(0.0, 0.0, 1.0, 1.0)*CameraMatrix).xyz;"
" gl_Position = ProjectionMatrix * CameraMatrix * gl_Position;"
" vec3 TexOffs = mat3(CameraMatrix)*vertNormal*0.05;"
" vertTexCoord = "
" vec2(0.5, 0.5) +"
" (gl_Position.xy/gl_Position.w)*0.5 +"
" (TexOffs.z<0.0 ? TexOffs.xy : -TexOffs.xy);"
"}"
);
shape_vs.Compile();
shape_fs.Source(
"#version 140\n"
"uniform sampler2D RefractTex;"
"in vec3 vertNormal;"
"in vec3 vertLightDir;"
"in vec3 vertLightRefl;"
"in vec3 vertViewDir;"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"float adj_lt(float i)"
"{"
" return i > 0.0 ? i : -0.7*i;"
"}"
"void main(void)"
"{"
" float l = length(vertLightDir);"
" float d = dot("
" normalize(vertNormal), "
" normalize(vertLightDir)"
" ) / l;"
" float s = dot("
" normalize(vertLightRefl),"
" normalize(vertViewDir)"
" );"
" vec3 lt = vec3(1.0, 1.0, 1.0);"
" vec3 tex = texture(RefractTex, vertTexCoord).rgb;"
" fragColor = vec4("
" tex * 0.5 + "
" (lt + tex) * 1.5 * adj_lt(d) + "
" lt * pow(adj_lt(s), 64), "
" 1.0"
" );"
"}"
);
shape_fs.Compile();
shape_prog.AttachShader(shape_vs);
shape_prog.AttachShader(shape_fs);
shape_prog.Link();
shape_prog.Use();
shape_proj_matrix.BindTo("ProjectionMatrix");
shape_camera_matrix.BindTo("CameraMatrix");
shape_model_matrix.BindTo("ModelMatrix");
shape_clip_plane.BindTo("ClipPlane");
shape_clip_direction.BindTo("ClipDirection");
Uniform<Vec3f>(shape_prog, "LightPosition").Set(lightPos);
gl.Bind(shape);
gl.Bind(Buffer::Target::Array, shape_verts);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(shape_prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
gl.Bind(Buffer::Target::Array, shape_normals);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_shape.Normals(data);
Buffer::Data(Buffer::Target::Array, data);
VertexArrayAttrib attr(shape_prog, "Normal");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
//
Texture::Active(0);
UniformSampler(shape_prog, "RefractTex").Set(0);
{
gl.Bound(Texture::Target::_2D, refract_tex)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::MirroredRepeat)
.WrapT(TextureWrap::MirroredRepeat)
.Image2D(
0,
PixelDataInternalFormat::RGB,
tex_side, tex_side,
0,
PixelDataFormat::RGB,
PixelDataType::UnsignedByte,
nullptr
);
}
//
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
GlassAndMetalExample(void)
: transf_prog()
, metal_prog()
, plane(transf_prog, shapes::Plane(Vec3f(9, 0, 0), Vec3f(0, 0,-9)))
, torus(transf_prog, shapes::WickerTorus())
, shadow_tex_side(1024)
{
NoProgram().Use();
shadow_pp.Bind();
shadow_pp.UseStages(transf_prog).Vertex();
shadow_pp.UseStages(shadow_prog).Fragment();
light_pp.Bind();
light_pp.UseStages(transf_prog).Vertex();
light_pp.UseStages(light_prog).Fragment();
glass_pp.Bind();
glass_pp.UseStages(transf_prog).Vertex();
glass_pp.UseStages(glass_prog).Fragment();
metal_pp.Bind();
metal_pp.UseStages(transf_prog).Vertex();
metal_pp.UseStages(metal_prog).Fragment();
Texture::Active(0);
metal_prog.metal_tex.Set(0);
gl.Bound(Texture::Target::_2D, metal_texture)
.MinFilter(TextureMinFilter::LinearMipmapLinear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::Repeat)
.WrapT(TextureWrap::Repeat)
.Image2D(
images::BrushedMetalUByte(
512, 512,
5120,
-3, +3,
32, 128
)
).GenerateMipmap();
Texture::Active(1);
metal_prog.frame_shadow_tex.Set(1);
glass_prog.frame_shadow_tex.Set(1);
gl.Bound(Texture::Target::_2D, frame_shadow_tex)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToEdge)
.WrapT(TextureWrap::ClampToEdge)
.CompareMode(TextureCompareMode::CompareRefToTexture)
.Image2D(
0,
PixelDataInternalFormat::DepthComponent32,
shadow_tex_side, shadow_tex_side,
0,
PixelDataFormat::DepthComponent,
PixelDataType::Float,
nullptr
);
gl.Bound(Framebuffer::Target::Draw, frame_shadow_fbo)
.AttachTexture(
FramebufferAttachment::Depth,
frame_shadow_tex,
0
);
Texture::Active(2);
metal_prog.glass_shadow_tex.Set(2);
gl.Bound(Texture::Target::_2D, glass_shadow_tex)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToEdge)
.WrapT(TextureWrap::ClampToEdge)
.Image2D(
0,
PixelDataInternalFormat::RGBA,
shadow_tex_side, shadow_tex_side,
0,
PixelDataFormat::RGBA,
PixelDataType::UnsignedByte,
nullptr
);
gl.Bound(Framebuffer::Target::Draw, glass_shadow_fbo)
.AttachTexture(
FramebufferAttachment::Color,
glass_shadow_tex,
0
);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::OneMinusSrcAlpha);
gl.PolygonOffset(1.0, 1.0);
}
void GIDeferredRenderer::SetupGeometryBuffer(unsigned windowWidth,
unsigned windowHeight)
{
using namespace oglplus;
static Context gl;
// initialize geometry buffer
geometryBuffer.Bind(FramebufferTarget::Draw);
// build textures -- normal
gl.Bound(TextureTarget::_2D, bufferTextures[0])
.Image2D(0, PixelDataInternalFormat::RGBA16F, windowWidth, windowHeight,
0, PixelDataFormat::RGB, PixelDataType::Float, nullptr)
.MinFilter(TextureMinFilter::Nearest)
.MagFilter(TextureMagFilter::Nearest);
geometryBuffer.AttachColorTexture(FramebufferTarget::Draw, 0, bufferTextures[0],
0);
// build textures -- albedo
gl.Bound(TextureTarget::_2D, bufferTextures[1])
.Image2D(0, PixelDataInternalFormat::RGB8, windowWidth, windowHeight,
0, PixelDataFormat::RGB, PixelDataType::UnsignedByte, nullptr)
.MinFilter(TextureMinFilter::Nearest)
.MagFilter(TextureMagFilter::Nearest);
geometryBuffer.AttachColorTexture(FramebufferTarget::Draw, 1, bufferTextures[1],
0);
// build textures -- specular color and shininess
gl.Bound(TextureTarget::_2D, bufferTextures[2])
.Image2D(0, PixelDataInternalFormat::RGBA8, windowWidth, windowHeight,
0, PixelDataFormat::RGBA, PixelDataType::UnsignedByte, nullptr)
.MinFilter(TextureMinFilter::Nearest)
.MagFilter(TextureMagFilter::Nearest);
geometryBuffer.AttachColorTexture(FramebufferTarget::Draw, 2, bufferTextures[2],
0);
// emissivenes
gl.Bound(TextureTarget::_2D, bufferTextures[3])
.Image2D(0, PixelDataInternalFormat::RGB8, windowWidth, windowHeight,
0, PixelDataFormat::RGB, PixelDataType::UnsignedByte, nullptr)
.MinFilter(TextureMinFilter::Nearest)
.MagFilter(TextureMagFilter::Nearest);
geometryBuffer.AttachColorTexture(FramebufferTarget::Draw, 3, bufferTextures[3],
0);
// attach depth texture for depth testing
gl.Bound(TextureTarget::_2D, bufferTextures[4])
.Image2D(0, PixelDataInternalFormat::DepthComponent24, windowWidth,
windowHeight, 0, PixelDataFormat::DepthComponent,
PixelDataType::Float, nullptr)
.MinFilter(TextureMinFilter::Nearest)
.MagFilter(TextureMagFilter::Nearest);
geometryBuffer.AttachTexture(FramebufferTarget::Draw,
FramebufferAttachment::Depth,
bufferTextures[4], 0);
// color textures
auto attachments = std::vector<Context::ColorBuffer>
{
FramebufferColorAttachment::_0 ,
FramebufferColorAttachment::_1,
FramebufferColorAttachment::_2,
FramebufferColorAttachment::_3
};
// set draw buffers
gl.DrawBuffers(attachments);
// check if success building frame buffer
if (!Framebuffer::IsComplete(FramebufferTarget::Draw))
{
auto status = Framebuffer::Status(FramebufferTarget::Draw);
Framebuffer::HandleIncompleteError(FramebufferTarget::Draw, status);
}
Framebuffer::Bind(Framebuffer::Target::Draw, FramebufferName(0));
}
SketchExample(void)
: transf_prog()
, sketch_prog()
, plane(
transf_prog,
shapes::Plane(
Vec3f(0, 0, 0),
Vec3f(9, 0, 0),
Vec3f(0, 0,-9),
9, 9
)
), torus(transf_prog, shapes::WickerTorus())
, sketch_tex_layers(8)
, shadow_tex_side(1024)
{
NoProgram().Use();
shadow_pp.Bind();
shadow_pp.UseStages(transf_prog).Vertex();
shadow_pp.UseStages(shadow_prog).Fragment();
sketch_pp.Bind();
sketch_pp.UseStages(transf_prog).Vertex();
sketch_pp.UseStages(sketch_prog).Fragment();
line_pp.Bind();
line_pp.UseStages(transf_prog).Vertex();
line_pp.UseStages(line_prog).Geometry().Fragment();
Texture::Active(0);
sketch_prog.sketch_tex.Set(0);
{
auto bound_tex = gl.Bound(Texture::Target::_3D, sketch_texture);
for(GLuint i=0; i<sketch_tex_layers; ++i)
{
auto image = images::BrushedMetalUByte(
512, 512,
64 + i*128,
-(2+i*4), +(2+i*4),
64, 256-i*4
);
if(i == 0)
{
bound_tex.Image3D(
0,
PixelDataInternalFormat::RGB,
image.Width(),
image.Height(),
sketch_tex_layers,
0,
image.Format(),
image.Type(),
nullptr
);
}
bound_tex.SubImage3D(
0,
0, 0, i,
image.Width(),
image.Height(),
1,
image.Format(),
image.Type(),
image.RawData()
);
}
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::Repeat);
bound_tex.WrapT(TextureWrap::Repeat);
bound_tex.WrapR(TextureWrap::ClampToEdge);
}
Texture::Active(1);
sketch_prog.shadow_tex.Set(1);
gl.Bound(Texture::Target::_2D, shadow_tex)
.MinFilter(TextureMinFilter::Linear)
.MagFilter(TextureMagFilter::Linear)
.WrapS(TextureWrap::ClampToEdge)
.WrapT(TextureWrap::ClampToEdge)
.CompareMode(TextureCompareMode::CompareRefToTexture)
.Image2D(
0,
PixelDataInternalFormat::DepthComponent32,
shadow_tex_side, shadow_tex_side,
0,
PixelDataFormat::DepthComponent,
PixelDataType::Float,
nullptr
);
gl.Bound(Framebuffer::Target::Draw, frame_shadow_fbo)
.AttachTexture(
FramebufferAttachment::Depth,
shadow_tex,
0
);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.DepthFunc(CompareFn::LEqual);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::OneMinusSrcAlpha);
gl.PolygonOffset(1.0, 1.0);
gl.LineWidth(1.5);
}
