LightRayExample(void)
: gl()
, mesh_loader(
mesh_input.stream,
shapes::ObjMesh::LoadingOptions(false).Normals()
), meshes(List("Position")("Normal").Get(), mesh_loader)
, fan_index(mesh_loader.GetMeshIndex("Fan"))
, light_position(0.0, 0.0, -100.0)
, vert_shader()
, mask_prog(vert_shader)
, mask_vao(meshes.VAOForProgram(mask_prog))
, draw_prog(vert_shader)
, draw_vao(meshes.VAOForProgram(draw_prog))
, shadow_tex_unit(0)
, light_tex_unit(1)
{
mesh_input.stream.close();
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
RenderShadowMap(512);
SetupLightMask();
mask_prog.Use();
mask_prog.light_position.Set(light_position);
draw_prog.Use();
draw_prog.light_position.Set(light_position);
gl.ClearColor(1.0f, 1.0f, 1.0f, 0.0f);
}
FlowExample(void)
: gl()
, flow(images::LoadTexture("flow_map"), 1)
, screen(
List("Position")("TexCoord").Get(),
shapes::Screen(),
screen_prog
)
{
Texture::Active(0);
{
auto bound_tex = Bind(background, Texture::Target::_2D);
bound_tex.Image2D(images::LoadTexture("flower_glass"));
bound_tex.MinFilter(TextureMinFilter::Linear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::MirroredRepeat);
bound_tex.WrapT(TextureWrap::MirroredRepeat);
}
screen_prog.background.Set(0);
screen_prog.normal_map.Set(flow.TexUnit());
gl.ClearColor(0.4f, 0.4f, 0.4f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
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);
}
CubeExample(void)
: n(16)
, screen_prog()
, draw_prog()
, screen(List("Position")("TexCoord").Get(), shapes::Screen(), screen_prog)
, cube(List("Position").Get(), shapes::Cube(), draw_prog)
{
draw_prog.Use();
UniformBlock(draw_prog, "OffsetBlock").Binding(0);
cube_pos<< BufferIndexedTarget::Uniform << 0
<< BufferUsage::StaticDraw
<< OffsetData(n);
ProgramUniformSampler(screen_prog, "Palette").Set(0);
Texture::Active(0);
palette << Texture::Target::_1D
<< TextureFilter::Nearest
<< TextureWrap::ClampToEdge
<< images::LinearGradient(
16,
Vec3f(0, 0, 0),
std::map<GLfloat, Vec3f>({
{ 0.0/16.0, Vec3f(0.0, 0.0, 0.0)},
{ 1.0/16.0, Vec3f(0.5, 0.0, 1.0)},
{ 3.0/16.0, Vec3f(0.0, 0.0, 1.0)},
{ 6.0/16.0, Vec3f(0.0, 0.6, 0.6)},
{ 8.0/16.0, Vec3f(0.0, 1.0, 0.0)},
{ 11.0/16.0, Vec3f(0.6, 0.6, 0.0)},
{ 13.0/16.0, Vec3f(1.0, 0.1, 0.0)},
{ 16.0/16.0, Vec3f(0.7, 0.0, 0.0)}
})
);
ProgramUniformSampler(screen_prog, "Tex").Set(1);
Texture::Active(1);
tex << Texture::Target::Rectangle
<< TextureMinFilter::Nearest
<< TextureMagFilter::Nearest
<< TextureWrap::ClampToEdge
<< images::ImageSpec(
64, 64,
Format::Red,
InternalFormat::R8,
DataType::UnsignedByte
);
rbo << Renderbuffer::Target::Renderbuffer
<< images::ImageSpec(64, 64, InternalFormat::DepthComponent);
fbo << Framebuffer::Target::Draw
<< FramebufferAttachment::Color << tex
<< FramebufferAttachment::Depth << rbo
<< FramebufferComplete();
gl.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::CullFace);
}
CubeExample(void)
: gl()
, prog()
, field(
images::FlipImageAxes<GLubyte, 1>(
images::LoadTexture("suzanne_vol"),
0, 2,-1
),
prog
), shadowmaps(
images::LoadTexture("oglcraft_ao"),
prog
)
{
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.FrontFace(FaceOrientation::CCW);
gl.CullFace(Face::Back);
prog.Use();
field.Use();
}
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);
}
SphereExample(void)
: vs(make_vs())
, proton(vs,make_fs(fs_proton()))
, neutron(vs,make_fs(fs_neutron()))
, electron(vs,make_fs(fs_electron()))
{
gl.ClearColor(0.3f, 0.3f, 0.3f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
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;
}
SortingExample(void)
: gl()
, particles(4096)
, dist_proc(particles)
, sort_proc(particles)
, draw_proc(particles)
{
gl.ClearColor(0.3f, 0.3f, 0.3f, 0.0f);
gl.Enable(Capability::DepthTest);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::OneMinusSrcAlpha);
}
SubsurfExample(void)
: gl()
, shape("stanford_dragon", data_prog)
, screen(List("Position").Get(), shapes::Screen(), draw_prog)
, data_buffer(draw_prog, 0, 800, 600)
{
gl.Enable(Capability::CullFace);
gl.CullFace(Face::Back);
gl.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.ClearDepth(1.0f);
}
MorphingExample()
: shape(point_prog)
, status(0.0) {
point_prog.color_1 = Vec3f(1.0f, 0.5f, 0.4f);
point_prog.color_2 = Vec3f(1.0f, 0.8f, 0.7f);
gl.ClearColor(0.2f, 0.2f, 0.2f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::ProgramPointSize);
gl.Enable(Capability::Blend);
}
ShapeExample(void)
: vs(make_vs())
, sphere(vs,make_fs(fs_yb_strips(), "Y/B strips"))
, cubeX(vs, make_fs(fs_bw_checker(), "B/W checker"))
, cubeY(vs, make_fs(fs_br_circles(), "B/R circles"))
, cubeZ(vs, make_fs(fs_wg_spirals(), "W/G spirals"))
, torus(vs, make_fs(fs_wo_vstrips(), "W/O vstrips"))
{
gl.ClearColor(0.5f, 0.5f, 0.5f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
int main() {
sf::ContextSettings set;
set.antialiasingLevel = 8;
sf::Window w(sf::VideoMode(700, 700), "ogl", sf::Style::Default, set);
glewExperimental = true;
glewInit();
Context gl;
gl.ClearColor(0.0, 0.0, 0.0, 1.0);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.Enable(Capability::Blend);
w.setMouseCursorVisible(false);
Pyramid pyramid { w };
bool running = true;
while(running) {
sf::Event e;
while(w.pollEvent(e)){
if(e.type == sf::Event::Closed){ running = false; }
if(e.type == sf::Event::KeyPressed) {
switch(e.key.code) {
case sf::Keyboard::Escape:
running = false;
break;
case sf::Keyboard::W: case sf::Keyboard::Up:
camera.forward();
break;
case sf::Keyboard::A: case sf::Keyboard::Left:
camera.left();
break;
case sf::Keyboard::S: case sf::Keyboard::Down:
camera.back();
break;
case sf::Keyboard::D: case sf::Keyboard::Right:
camera.right();
break;
default:
break;
}
}
if(e.type == sf::Event::MouseMoved) {
//idk
}
}
pyramid.update();
pyramid.draw(gl);
gl.Clear().ColorBuffer().DepthBuffer();
w.display();
}
return 0;
}
CubeExample(void)
{
scene.AddShape(shapes::Cage());
scene.AddShape(shapes::WickerTorus(1.0, 0.5, 0.02, 12, 12));
scene.AddShape(shapes::SpiralSphere());
scene.AddShape(shapes::TwistedTorus(0.9, 0.5, 0.02, 8, 48, 7));
scene.AddShape(shapes::Icosahedron());
gl.ClearColor(0.1f, 0.1f, 0.1f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
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);
}
ObjMeshExample(void)
: gl()
, objects(load_objects())
, depth_prog()
, draw_prog()
, depth_vao(objects.VAOForProgram(depth_prog))
, draw_vao(objects.VAOForProgram(draw_prog))
{
UniformSampler(draw_prog, "DepthTex").Set(0);
Texture::Active(0);
depth_tex.Bind(Texture::Target::Rectangle);
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
}
RainExample(void)
: env_map(0)
, ripples(1)
, water_prog()
, water(water_prog, shapes::Plane(Vec3f(40,0,0), Vec3f(0,0,-40)))
{
water_prog.light_position.Set(2.0, 10.0, -4.0);
water_prog.ripple_tex.Set(ripples.TexUnit());
water_prog.env_tex.Set(env_map.TexUnit());
gl.ClearColor(0.4f, 0.4f, 0.4f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
}
void Use(void)
{
gl.ClearDepth(1.0f);
gl.ClearColor(0.8f, 0.8f, 0.8f, 0.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.CullFace(Face::Back);
dfb.Bind(Framebuffer::Target::Draw);
gl.Viewport(width, height);
prog.Use();
cube.Use();
SetProjection();
}
void Use(void)
{
gl.ClearDepth(1.0f);
gl.ClearColor(0.9f, 0.4f, 0.4f, 1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::CullFace);
gl.CullFace(Face::Back);
fbo.Bind(Framebuffer::Target::Draw);
gl.Viewport(tex_side, tex_side);
prog.Use();
shape.Use();
projection_matrix.Set(CamMatrixf::PerspectiveX(Degrees(48), 1.0, 1, 100));
}
TorusExample(void)
: make_torus(1.0, 0.5, 36, 24)
, torus_instr(make_torus.Instructions())
, torus_indices(make_torus.Indices())
, prog(make_prog())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
{
Uniform<Vec4f>(prog, "ClipPlane").Set(0.f, 0.f, 1.f, 0.f);
// 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
VertexArrayAttrib attr(prog, "Position");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
// bind the VBO for the torus UV-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
VertexArrayAttrib attr(prog, "TexCoord");
attr.Setup<GLfloat>(n_per_vertex);
attr.Enable();
}
//
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.ClearDepth(1.0f);
gl.FrontFace(make_torus.FaceWinding());
gl.Enable(Capability::DepthTest);
gl.Enable(Functionality::ClipDistance, 0);
}
void GIDeferredRenderer::Render()
{
using namespace oglplus;
static Context gl;
static auto &camera = Camera::Active();
static auto &scene = Scene::Active();
static auto &info = Window().Info();
if (!camera || !scene || !scene->IsLoaded() || VoxelizerRenderer::ShowVoxels)
{
return;
}
SetAsActive();
// bind g buffer for writing
geometryBuffer.Bind(FramebufferTarget::Draw);
gl.ColorMask(true, true, true, true);
gl.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.Viewport(info.framebufferWidth, info.framebufferHeight);
gl.Clear().ColorBuffer().DepthBuffer();
// activate geometry pass shader program
CurrentProgram<GeometryProgram>(GeometryPass());
// rendering and GL flags
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Disable(Capability::Blend);
gl.Enable(Capability::CullFace);
gl.FrontFace(FaceOrientation::CCW);
gl.CullFace(Face::Back);
camera->DoFrustumCulling(true);
// draw whole scene tree from root node
scene->rootNode->DrawList();
// start light pass
DefaultFramebuffer().Bind(FramebufferTarget::Draw);
gl.ColorMask(true, true, true, true);
gl.Viewport(info.framebufferWidth, info.framebufferHeight);
gl.Clear().ColorBuffer().DepthBuffer();
CurrentProgram<LightingProgram>(LightingPass());
// pass light info and texture locations for final light pass
SetLightPassUniforms();
// draw the result onto a fullscreen quad
fsQuad.DrawElements();
}
LiquidExample(const ExampleParams& params)
: liquid_prog()
, grid(liquid_prog, params.quality)
, grid_repeat(1 + params.quality*2)
{
Texture::Active(0);
{
auto image = images::NewtonFractal(
256, 256,
Vec3f(0.1f, 0.1f, 0.1f),
Vec3f(1.0f, 1.0f, 1.0f),
Vec2f(-1.0f, -1.0f),
Vec2f( 1.0f, 1.0f),
images::NewtonFractal::X4Minus1(),
images::NewtonFractal::DefaultMixer()
);
auto bound_tex = oglplus::Context::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);
}
ProgramUniformSampler(liquid_prog, "EnvMap").Set(0);
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);
}
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);
}
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);
}
void ShadowMapRenderer::Render()
{
using namespace oglplus;
static Context gl;
static Scene * scenePtr = nullptr;
static auto &scene = Scene::Active();
auto camera = Camera::Active().get();
if (!camera || !scene || !scene->IsLoaded() || !shadowCaster)
{
return;
}
// initially assign invalid direction
static auto &changes = Transform::TransformChangedMap();
static bool updateShadowMap = true;
// any node transformation happened
for (auto &c : changes)
{
auto &type = typeid(*c.first);
if (type == typeid(Node))
{
updateShadowMap = true; break;
}
}
// shadow caster change
if (shadowCaster->TransformChanged()) { updateShadowMap = true; }
// scene change
if (scenePtr != scene.get())
{
scenePtr = scene.get();
updateShadowMap = true;
}
if (!updateShadowMap) { return; }
updateShadowMap = false;
// update shadow map
SetAsActive();
lightView.SetAsActive();
shadowFramebuffer.Bind(FramebufferTarget::Draw);
gl.Viewport(0, 0, shadowMapSize.x, shadowMapSize.y);
gl.ClearColor(0.0f, 0.0f, 0.0f, 0.0f);
gl.Clear().DepthBuffer().ColorBuffer();
// activate geometry pass shader program
auto &prog = DepthShader();
CurrentProgram<DepthProgram>(prog);
// rendering flags
gl.Disable(Capability::Blend);
gl.Enable(Capability::DepthTest);
gl.Disable(Capability::CullFace);
// unneded since directional light cover the whole scene
// can be useful for view frustum aware light frustum later
lightView.DoFrustumCulling(false);
// scene spatial cues
auto sceneBB = scene->rootNode->boundaries;
auto ¢er = sceneBB.Center();
auto radius = distance(center, sceneBB.MaxPoint());
// fix light frustum to fit scene bounding sphere
lightView.OrthoRect(glm::vec4(-radius, radius, -radius, radius));
lightView.ClipPlaneNear(-radius);
lightView.ClipPlaneFar(2.0f * radius);
lightView.Projection(Camera::ProjectionMode::Orthographic);
lightView.transform.Position(center + shadowCaster->Direction() * radius);
lightView.transform.Forward(-shadowCaster->Direction());
// update lightview matrix
LightSpaceMatrix();
// uniforms
prog.exponents.Set(exponents);
// draw whole scene tree from root node
scene->rootNode->DrawList();
// recover original render camera
camera->SetAsActive();
// blur the result evsm map
if(blurScale > 0)
{
BlurShadowMap();
}
// recover
DefaultFramebuffer().Bind(FramebufferTarget::Draw);
// no trilinear filtering
if (filtering < 2) return;
// mip map shadow map
shadowMap.Bind(TextureTarget::_2D);
shadowMap.GenerateMipmap(TextureTarget::_2D);
}