void Render(double time) {
const double day_duration = 67.0;
auto sun =
Vec3f(0.000, 1.000, 0.000) * 1e10 * SineWave(time / day_duration) +
Vec3f(0.000, 0.000, -1.000) * 1e10 * CosineWave(time / day_duration);
auto camera = CamMatrixf::Orbiting(
Vec3f(),
5.0,
FullCircles(-0.10 - time / 27.0),
Degrees(-20 - SineWave(time / 17.0) * 30));
auto model = ModelMatrixf::RotationA(
Vec3f(1.0, 1.0, 1.0), FullCircles(time / 13.0));
gl.Clear().ColorBuffer().DepthBuffer();
sky_box.Use();
sky_box_prog.Use();
sky_box_camera_matrix.Set(camera);
sky_box_sun_position.Set(sun);
sky_box.Draw();
shape.Use();
shape_prog.Use();
shape_model_matrix.Set(model);
shape_camera_matrix.Set(camera);
shape_camera_position.Set(camera.Position());
shape_sun_position.Set(sun);
shape.Draw();
}
void RenderOffscreen(double time)
{
fbo.Bind();
gl.Clear().ColorBuffer().DepthBuffer();
gl.BlendFunc(BlendFn::One, BlendFn::One);
gl.Enable(Capability::Blend);
gl.Enable(Capability::DepthTest);
draw_prog.Use();
draw_prog.camera_matrix.Set(
CamMatrixf::Orbiting(
Vec3f(),
27.0,
Degrees(time * 23),
Degrees(SineWave(time / 23.0) * 80)
)
);
cube.Use();
cube.Draw(n*n*n);
gl.Disable(Capability::DepthTest);
gl.Disable(Capability::Blend);
fbo.Unbind();
}
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);
}
void Update(double time)
{
gl.Viewport(size, size);
fbo.Bind(Framebuffer::Target::Draw);
Framebuffer::AttachColorTexture(
Framebuffer::Target::Draw,
1,
holder.CurrentHeightMap(),
0
);
Context::ColorBuffer draw_buffs[2] = {
FramebufferColorAttachment::_0,
FramebufferColorAttachment::_1
};
gl.DrawBuffers(draw_buffs);
prog.Use();
prog.hmap_1.Set(holder.HMapUnit1());
prog.hmap_2.Set(holder.HMapUnit2());
prog.time.Set(time);
screen.Use();
gl.Disable(Capability::DepthTest);
screen.Draw();
gl.Enable(Capability::DepthTest);
holder.Swap();
}
void Render(double time)
{
auto camera =
CamMatrixf::Roll(Degrees(SineWave(time / 11.0)*7+SineWave(time/13.0)*5))*
CamMatrixf::Orbiting(
Vec3f(),
40.0f,
Degrees(SineWave(time / 11.0)*10+CosineWave(time/19.0)*10-90),
Degrees(SineWave(time / 17.0)*10+SineWave(time/13.0)*10)
);
auto mm_identity = ModelMatrixf();
auto mm_rotation = ModelMatrixf::RotationZ(FullCircles(time / 7.0));
Uniform<Mat4f>* model_matrix = nullptr;
GLuint drawing_fan = fan_index;
auto drawing_driver =
[
&model_matrix,
&mm_identity,
&mm_rotation,
&drawing_fan
](GLuint phase) -> bool
{
if(phase == drawing_fan)
model_matrix->Set(mm_rotation);
else model_matrix->Set(mm_identity);
return true;
};
// render the light mask
light_fbo.Bind(Framebuffer::Target::Draw);
gl.Clear().ColorBuffer().DepthBuffer();
mask_vao.Bind();
mask_prog.Use();
mask_prog.camera_matrix.Set(camera);
model_matrix = &mask_prog.model_matrix;
meshes.Draw(drawing_driver);
// render the final image
DefaultFramebuffer().Bind(Framebuffer::Target::Draw);
gl.Clear().ColorBuffer().DepthBuffer();
draw_vao.Bind();
draw_prog.Use();
Vec4f lsp = projection * camera * Vec4f(light_position, 1.0);
draw_prog.light_screen_pos = lsp.xyz()/lsp.w();
draw_prog.camera_matrix.Set(camera);
model_matrix = &draw_prog.model_matrix;
meshes.Draw(drawing_driver);
}
void Render(double time)
{
flow.Update(time);
Framebuffer::BindDefault(Framebuffer::Target::Draw);
gl.DrawBuffer(ColorBuffer::BackLeft);
gl.Viewport(width, height);
gl.Clear().ColorBuffer().DepthBuffer();
screen_prog.Use();
screen.Use();
screen.Draw();
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
camera_matrix.Set(
CamMatrixf::Orbiting(
Vec3f(),
4.0,
Degrees(time * 25),
Degrees(SineWave(time / 30.0) * 90)
)
);
model_matrix.Set(
ModelMatrixf::RotationA(
Vec3f(1.0f, 1.0f, 1.0f),
FullCircles(time * 0.5)
)
);
shape.Draw();
thread_ready.Signal();
parent_ready.Wait();
}
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);
}
void Draw(double time, double fade)
{
// Shadow map
shadows_fbo.Bind(FramebufferTarget::Draw);
gl.Viewport(shadow_size, shadow_size);
gl.Clear().DepthBuffer();
auto light = CamMatrixf::Orbiting(
Vec3f(0, side*0.25, 0),
side*1.5,
Degrees(-time * 27),
Degrees(SineWave(time / 19.0)*25 + 45)
);
shadow_prog.fade.Set(fade);
shadow_prog.camera_matrix.Set(light);
shadow_prog.Use();
shadow_vao.Bind();
gl.Enable(Capability::PolygonOffsetFill);
cube.Draw(side*side);
gl.Disable(Capability::PolygonOffsetFill);
gl.Finish();
// On-screen
default_fb.Bind(Framebuffer::Target::Draw);
gl.Viewport(width, height);
gl.Clear().ColorBuffer().DepthBuffer();
auto camera = CamMatrixf::Orbiting(
Vec3f(),
side*1.1,
Degrees(time * 19),
Degrees(SineWave(time / 20.0) * 39 + 50)
);
display_prog.fade.Set(fade);
display_prog.light_pos.Set(light.Position());
display_prog.camera_pos.Set(camera.Position());
display_prog.light_matrix.Set(light);
display_prog.camera_matrix.Set(camera);
display_prog.Use();
display_vao.Bind();
cube.Draw(side*side);
}
void Render(double time)
{
gl.ClearDepth(0.0f);
gl.Clear().DepthBuffer();
auto camera =
CamMatrixf::Orbiting(
objects.BoundingSphere().Center(),
objects.BoundingSphere().Radius()*2.8,
FullCircles(time / 19.0),
Degrees(SineWave(time / 17.0) * 90)
);
depth_prog.Use();
gl.DepthFunc(CompareFn::Greater);
gl.CullFace(Face::Front);
depth_prog.camera_matrix.Set(camera);
depth_prog.model_matrix.Set(Mat4f());
objects.Draw();
Texture::CopyImage2D(
Texture::Target::Rectangle,
0,
PixelDataInternalFormat::DepthComponent,
0, 0,
width,
height,
0
);
gl.ClearDepth(1.0f);
gl.Clear().ColorBuffer().DepthBuffer();
draw_prog.Use();
gl.DepthFunc(CompareFn::Less);
gl.CullFace(Face::Back);
draw_prog.camera_matrix.Set(camera);
draw_prog.model_matrix.Set(Mat4f());
objects.Draw();
}
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 Render(double time)
{
float o = 2;
float s = 24;
prog.offset.Set(
GLfloat(CosineWave(time/59.0)*o),
GLfloat(SineWave(time/61.0)*o)
);
prog.scale.Set(GLfloat(s + 1 + SineWave(time / 19.0)*s));
screen.Draw();
}
BarDisplay(void)
: gl()
, side(128)
, shadow_size(512)
, cube(
List("Position")("Normal").Get(),
shapes::Cube(0.95, 1.0, 0.95, 0.0, 0.5, 0.0)
), display_vao(cube.VAOForProgram(display_prog))
, shadow_vao(cube.VAOForProgram(shadow_prog))
{
init_shadows();
init_heights();
init_offsets();
auto light_proj = CamMatrixf::PerspectiveX(
Degrees(74),
1.0,
1, 3*side
);
display_prog.light_proj_matrix.Set(light_proj);
shadow_prog.projection_matrix.Set(light_proj);
gl.PolygonOffset(4.0, 4.0);
}
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);
}
void Render(ExampleClock& clock) {
gl.Clear().ColorBuffer().DepthBuffer();
double time = clock.Now().Seconds();
auto langle = FullCircles(time / 23.0);
light_position.Set(
GLfloat(Cos(langle) * 20.0),
GLfloat((1.2 + Sin(langle)) * 15.0),
GLfloat(Sin(langle) * 20.0));
double x = SineWave(time / 13.0);
if(x + 0.93 < 0.0)
clock.Pace(0.2);
else
clock.Pace(1.0);
auto camera = CamMatrixf::Orbiting(
Vec3f(),
GLfloat(9.5 + x * 5.1),
FullCircles(time / 17.0),
Degrees(SineWave(time / 20.0) * 89));
camera_matrix.Set(camera);
camera_position.Set(camera.Position());
model_matrix.Set(
ModelMatrixf::TranslationX(+2.0f) *
ModelMatrixf::RotationX(FullCircles(time / 13.0)));
shape.Draw();
model_matrix.Set(
ModelMatrixf::TranslationX(-2.0f) *
ModelMatrixf::RotationZ(FullCircles(time / 11.0)));
shape.Draw();
}
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));
}
void Render(double time) {
gl.Clear().ColorBuffer().DepthBuffer();
auto camera = CamMatrixf::Orbiting(
Vec3f(),
2.9f,
FullCircles(time / 17.0),
Degrees(45 + SineWave(time / 20.0) * 40));
camera_matrix.Set(camera);
camera_position.Set(camera.Position());
auto langle = FullCircles(time / 31.0);
light_position.Set(
GLfloat(Cos(langle) * 20.0f),
GLfloat((1.2 + Sin(langle)) * 15.0f),
GLfloat(Sin(langle) * 20.0f));
shape.Draw();
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
camera_matrix.Set(
CamMatrixf::Orbiting(
Vec3f(),
3.0,
Degrees(time * 35),
Degrees(SineWave(time / 20.0) * 60)
)
);
model_matrix.Set(ModelMatrixf::RotationX(FullCircles(time * 0.25)));
assert(thread_ready);
thread_ready->Wait();
cube.Draw();
parent_ready.Signal();
}
void Render(double time)
{
GLfloat bs_rad = shape.BoundingSphere().Radius()*1.2f;
auto light =
CamMatrixf::Orbiting(
shape.BoundingSphere().Center(),
shape.BoundingSphere().Radius()*10.0f,
FullCircles(time / 23.0),
Degrees(-CosineWave(time / 31.0) * 80)
);
auto camera =
CamMatrixf::Orbiting(
shape.BoundingSphere().Center(),
shape.BoundingSphere().Radius()*
GLfloat(3.2+SineWave(time / 23.0)*0.8),
FullCircles(time / 19.0),
Degrees(SineWave(time / 21.0) * 80)
);
GLfloat cam_tgt_dist = Distance(
shape.BoundingSphere().Center(),
camera.Position()
);
auto cam_proj =
CamMatrixf::PerspectiveX(
Degrees(45),
width, height,
cam_tgt_dist-bs_rad,
cam_tgt_dist+bs_rad
);
auto model =
ModelMatrixf::RotationZ(Degrees(SineWave(time / 21.0)*25))*
ModelMatrixf::Translation(0.0f,-bs_rad*0.25f, 0.0f);
data_prog.Use();
data_prog.camera_matrix.Set(cam_proj*camera);
data_prog.model_matrix.Set(model);
data_prog.camera_position.Set(camera.Position());
data_prog.light_position.Set(light.Position());
data_buffer.Bind();
gl.Enable(Capability::DepthTest);
gl.Clear().ColorBuffer().DepthBuffer();
shape.Use();
shape.Draw();
draw_prog.Use();
draw_prog.slider.Set(GLfloat(CosineWave01(time / 11.0)*width));
DefaultFramebuffer().Bind(Framebuffer::Target::Draw);
gl.Disable(Capability::DepthTest);
gl.Clear().ColorBuffer();
screen.Use();
screen.Draw();
}
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);
}
void Render(double time)
{
gl.Clear().ColorBuffer().DepthBuffer();
//
auto camera = CamMatrixf::Orbiting(
Vec3f(0.0, 1.5, 0.0),
7.0 + SineWave(time / 11.0)*1.5,
FullCircles(time / 19.0),
Degrees(SineWave(time / 20.0) * 30 + 35)
);
cube_prog.camera_matrix = camera;
cube_prog.camera_position = camera.Position();
// shiny gray/blue checkered cube
cube_prog.frag_subroutines.Apply(cube_prog.frag_shiny_checker);
cube_prog.specular_factor = 32;
cube_prog.color_1 = Vec3f(0.9, 0.8, 0.7);
cube_prog.color_2 = Vec3f(0.3, 0.4, 0.5);
cube_prog.tex_scale = Vec2f(4, 4);
cube_prog.model_matrix =
ModelMatrixf::RotationY(FullCircles(time / 7.0))*
ModelMatrixf::Translation( 2.0, 0.0, 0.0)*
ModelMatrixf::RotationX(Degrees(25 * time));
cube.Draw();
// shiny textured cube
cube_prog.frag_subroutines.Apply(cube_prog.frag_shiny_texture);
cube_prog.specular_factor = 16;
cube_prog.tex_scale = Vec2f(1, 1);
cube_prog.model_matrix =
ModelMatrixf::RotationY(FullCircles(time / 7.0))*
ModelMatrixf::Translation(-2.0, 0.0, 0.0)*
ModelMatrixf::RotationX(Degrees(-17 * time));
cube.Draw();
// shiny yellow/black striped cube
cube_prog.frag_subroutines.Apply(cube_prog.frag_shiny_strips);
cube_prog.specular_factor = 32;
cube_prog.color_1 = Vec3f(0.9, 0.9, 0.1);
cube_prog.color_2 = Vec3f(0.1, 0.1, 0.1);
cube_prog.tex_scale = Vec2f(16, 16);
cube_prog.model_matrix =
ModelMatrixf::RotationY(FullCircles(time / 7.0))*
ModelMatrixf::Translation( 0.0, 2.0, 0.0)*
ModelMatrixf::RotationY(Degrees(37 * time));
cube.Draw();
// shiny gray/green spiral cube
cube_prog.frag_subroutines.Apply(cube_prog.frag_shiny_spiral);
cube_prog.specular_factor = 24;
cube_prog.color_1 = Vec3f(0.9, 0.9, 0.9);
cube_prog.color_2 = Vec3f(0.4, 0.9, 0.4);
cube_prog.tex_scale = Vec2f(1, 1);
cube_prog.model_matrix =
ModelMatrixf::RotationY(FullCircles(time / 7.0))*
ModelMatrixf::Translation( 0.0,-2.0, 0.0)*
ModelMatrixf::RotationY(Degrees(-13 * time));
cube.Draw();
// dull white/red striped cube
cube_prog.frag_subroutines
.Assign(
cube_prog.pixel_light_func,
cube_prog.dull
).Assign(
cube_prog.pixel_color_func,
cube_prog.strips
).Apply();
cube_prog.specular_factor = 32;
cube_prog.color_2 = Vec3f(1.0, 1.0, 1.0);
cube_prog.color_1 = Vec3f(0.9, 0.2, 0.2);
cube_prog.tex_scale = Vec2f(8, 6);
cube_prog.model_matrix =
ModelMatrixf::RotationY(FullCircles(time / 7.0))*
ModelMatrixf::Translation( 0.0, 0.0, 2.0)*
ModelMatrixf::RotationZ(Degrees(27 * time));
cube.Draw();
// dull textured cube
cube_prog.frag_subroutines
.Assign(
cube_prog.pixel_color_func,
cube_prog.texture_bgr
).Apply();
cube_prog.tex_scale = Vec2f(1, 1);
cube_prog.model_matrix =
ModelMatrixf::RotationY(FullCircles(time / 7.0))*
ModelMatrixf::Translation( 0.0, 0.0,-2.0)*
ModelMatrixf::RotationZ(Degrees(-23 * time));
cube.Draw();
}
TriangleExample(void)
: 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
)
)
{
VertexShader vs;
vs.Source(StrLit(
"#version 330\n"
"in vec3 Position;"
"in vec2 TexCoord;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" gl_Position = vec4(Position, 1.0);"
" vertTexCoord = TexCoord;"
"}"
)).Compile();
prog.AttachShader(vs);
GeometryShader gs;
gs.Source(StrLit(
"#version 330\n"
"#extension GL_ARB_gpu_shader5 : enable\n"
"layout(triangles, invocations = 7) in;"
"layout(triangle_strip, max_vertices = 21) out;"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"mat4 Matrix = ProjectionMatrix * CameraMatrix;"
"uniform vec3 CameraPosition;"
"in vec2 vertTexCoord[3];"
"out gl_PerVertex {"
" vec4 gl_Position;"
" float gl_ClipDistance[3];"
"};"
"flat out mat3 geomPositionFront;"
"flat out mat3 geomTexCoordFront;"
"flat out vec3 geomWFront;"
"noperspective out vec3 geomBarycentric;"
"out vec3 geomPosition;"
"out vec3 geomTexCoord;"
"void main(void)"
"{"
" vec4 world_pos[8*3];"
" vec3 tex_coord[8*3];"
" vec4 view_pos[8*3];"
" vec3 screen_pos[8*3];"
" bool front_facing[8];"
" int ft = gl_InvocationID+1;"
" for(int pass=0; pass!=2; ++pass)"
" {"
" bool first = pass == 0;"
" if(((ft == 0) && first) || (((ft != 0) && !first)))"
" {"
" for(int v=0; v!=3; ++v)"
" {"
" int w = 2-v;"
" world_pos[0+v] = gl_in[w].gl_Position;"
" tex_coord[0+v] = vec3(vertTexCoord[w], 0.0);"
" }"
" }"
" vec4 n = vec4(-0.15 * normalize(cross("
" gl_in[1].gl_Position.xyz-gl_in[0].gl_Position.xyz,"
" gl_in[2].gl_Position.xyz-gl_in[0].gl_Position.xyz "
" )), 0.0);"
" if(((ft == 1) && first) || (((ft != 1) && !first)))"
" {"
" for(int v=0; v!=3; ++v)"
" {"
" world_pos[3+v] = gl_in[v].gl_Position + n;"
" tex_coord[3+v] = vec3(vertTexCoord[v], 1.0);"
" }"
" }"
" for(int v=0; v!=3; ++v)"
" {"
" int w = (v+1)%3;"
" int k = 2+2*v;"
" if(((ft == k) && first) || (((ft != k) && !first)))"
" {"
" world_pos[6+0+v*6] = gl_in[v].gl_Position;"
" tex_coord[6+0+v*6] = vec3(vertTexCoord[v], 0.0);"
" world_pos[6+1+v*6] = gl_in[w].gl_Position;"
" tex_coord[6+1+v*6] = vec3(vertTexCoord[w], 0.0);"
" world_pos[6+2+v*6] = gl_in[v].gl_Position + n;"
" tex_coord[6+2+v*6] = vec3(vertTexCoord[v], 1.0);"
" }"
" k = 3+2*v;"
" if(((ft == k) && first) || (((ft != k) && !first)))"
" {"
" world_pos[6+3+v*6] = gl_in[w].gl_Position;"
" tex_coord[6+3+v*6] = vec3(vertTexCoord[w], 0.0);"
" world_pos[6+4+v*6] = gl_in[w].gl_Position + n;"
" tex_coord[6+4+v*6] = vec3(vertTexCoord[w], 1.0);"
" world_pos[6+5+v*6] = gl_in[v].gl_Position + n;"
" tex_coord[6+5+v*6] = vec3(vertTexCoord[v], 1.0);"
" }"
" }"
" for(int t=first?ft:0; t!=8; ++t)"
" {"
" if(!first && (t == ft)) continue;"
" int o = t*3;"
" for(int v=0; v!=3; ++v)"
" {"
" int w = o+v;"
" view_pos[w] = Matrix * world_pos[w];"
" screen_pos[w] = view_pos[w].xyz/view_pos[w].w;"
" }"
" front_facing[t] = cross("
" screen_pos[o+1]-screen_pos[o+0],"
" screen_pos[o+2]-screen_pos[o+0] "
" ).z < 0.0;"
" if(first) break;"
" }"
" if(first && !front_facing[ft]) return;"
" }"
" int o = ft*3;"
" vec4 clip_plane[3];"
" for(int v=0; v!=3; ++v)"
" {"
" int w = (v+1)%3;"
" vec3 p0 = world_pos[o+v].xyz;"
" vec3 p1 = world_pos[o+w].xyz;"
" vec3 p2 = CameraPosition;"
" vec3 pv = normalize(cross(p1-p0, p2-p0));"
" clip_plane[v] = vec4(pv, -dot(pv, p0));"
" }"
" vec3 lo = CameraPosition;"
" vec3 p0 = world_pos[o+0].xyz;"
" vec3 pu = world_pos[o+1].xyz-p0;"
" vec3 pv = world_pos[o+2].xyz-p0;"
" vec3 lp = lo-p0;"
" float w0 = view_pos[o+0].w;"
" float wu = view_pos[o+1].w-w0;"
" float wv = view_pos[o+2].w-w0;"
" vec3 t0 = tex_coord[o+0];"
" vec3 tu = tex_coord[o+1]-t0;"
" vec3 tv = tex_coord[o+2]-t0;"
" for(int bt=0; bt!=8; ++bt)"
" {"
" int k = bt*3;"
" if((ft != bt) && !front_facing[bt])"
" {"
" for(int v=0; v!=3; ++v)"
" {"
" vec3 lt = world_pos[k+v].xyz;"
" mat3 im = mat3(lo-lt, pu, pv);"
" vec3 ic = inverse(im)*lp;"
" float s = ic.y;"
" float t = ic.z;"
" geomPositionFront[v] = p0+pu*s+pv*t;"
" geomTexCoordFront[v] = t0+tu*s+tv*t;"
" geomWFront[v] = w0+wu*s+wv*t;"
" }"
" for(int v=0; v!=3; ++v)"
" {"
" int w = k+v;"
" gl_Position = view_pos[w];"
" for(int c=0; c!=3; ++c)"
" {"
" gl_ClipDistance[c] = dot("
" clip_plane[c],"
" world_pos[w]"
" );"
" }"
" geomPosition = world_pos[w].xyz;"
" geomTexCoord = tex_coord[w];"
" geomBarycentric = vec3(0.0);"
" geomBarycentric[v] = 1.0;"
" EmitVertex();"
" }"
" EndPrimitive();"
" }"
" }"
"}"
)).Compile();
prog.AttachShader(gs);
FragmentShader fs;
fs.Source(StrLit(
"#version 330\n"
"uniform float Time;"
"uniform sampler2D ColorMap;"
"uniform sampler2D BumpMap;"
"uniform vec3 LightPosition;"
"flat in mat3 geomPositionFront;"
"flat in mat3 geomTexCoordFront;"
"flat in vec3 geomWFront;"
"noperspective in vec3 geomBarycentric;"
"in vec3 geomPosition;"
"in vec3 geomTexCoord;"
"out vec3 fragColor;"
"vec3 vcdiv(vec3 a, vec3 b)"
"{"
" return vec3(a.x/b.x, a.y/b.y, a.z/b.z);"
"}"
"void main(void)"
"{"
" const vec3 one = vec3(1.0, 1.0, 1.0);"
" vec3 bzfv = vcdiv(geomBarycentric,geomWFront);"
" vec3 p0 = geomPosition;"
" vec3 p1 = (geomPositionFront*bzfv)/dot(one,bzfv);"
" vec3 tc0 = geomTexCoord;"
" vec3 tc1 = (geomTexCoordFront*bzfv)/dot(one,bzfv);"
" ivec2 ts = textureSize(BumpMap, 0);"
" int mts = max(ts.x, ts.y);"
" vec2 dtc = tc1.xy - tc0.xy;"
" float mdtc = max(abs(dtc.x), abs(dtc.y));"
" int nsam = max(min(int(mdtc*mts), mts/2), 1);"
" float step = 1.0 / nsam;"
" for(int s=0; s<=nsam; ++s)"
" {"
" vec3 tc = mix(tc1, tc0, s*step);"
" vec4 bm = texture(BumpMap, tc.xy);"
" if(tc.z <= bm.w)"
" {"
" vec3 p = mix(p1, p0, s*step);"
" vec3 ldir = normalize(LightPosition - p);"
" float l = max(dot(ldir, bm.xzy), 0.0)*1.3;"
" fragColor = texture(ColorMap, tc.xy).rgb*l;"
" return;"
" }"
" }"
" discard;"
"}"
)).Compile();
prog.AttachShader(fs);
prog.Link();
prog.Use();
shape.UseInProgram(prog);
auto tex_image = images::LoadTexture("stones_color_hmap");
Texture::Active(0);
try
{
UniformSampler(prog, "ColorMap").Set(0);
auto bound_tex = Bind(color_tex, Texture::Target::_2D);
bound_tex.Image2D(tex_image);
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::Repeat);
bound_tex.WrapT(TextureWrap::Repeat);
}
catch(Error&){ }
Texture::Active(1);
try
{
UniformSampler(prog, "BumpMap").Set(1);
auto bound_tex = Bind(bump_tex, Texture::Target::_2D);
bound_tex.Image2D(
images::NormalMap(
tex_image,
images::NormalMap::FromAlpha()
)
);
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.WrapS(TextureWrap::Repeat);
bound_tex.WrapT(TextureWrap::Repeat);
}
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);
}
void RenderShadowMap(GLuint size)
{
// matrices
auto lt_proj= CamMatrixf::PerspectiveX(Degrees(12), 1.0, 85.0, 110.0);
auto light = CamMatrixf::LookingAt(light_position, Vec3f());
// setup the texture
Texture::Active(shadow_tex_unit);
mask_prog.Use();
Uniform<Mat4f>(mask_prog, "LightMatrix").Set(lt_proj*light);
UniformSampler(mask_prog, "ShadowMap").Set(GLuint(shadow_tex_unit));
draw_prog.Use();
Uniform<Mat4f>(draw_prog, "LightMatrix").Set(lt_proj*light);
UniformSampler(draw_prog, "ShadowMap").Set(GLuint(shadow_tex_unit));
Texture::Target tex_tgt = Texture::Target::_2D;
shadow_map.Bind(tex_tgt);
Texture::MinFilter(tex_tgt, TextureMinFilter::Linear);
Texture::MagFilter(tex_tgt, TextureMagFilter::Linear);
Texture::WrapS(tex_tgt, TextureWrap::ClampToEdge);
Texture::WrapT(tex_tgt, TextureWrap::ClampToEdge);
Texture::CompareMode(tex_tgt, TextureCompareMode::CompareRefToTexture);
Texture::Image2D(
tex_tgt,
0,
PixelDataInternalFormat::DepthComponent32,
size, size,
0,
PixelDataFormat::DepthComponent,
PixelDataType::Float,
nullptr
);
// create shadow program
ShadowProgram shadow_prog(vert_shader);
// VAO for the meshes in shadow program
VertexArray vao = meshes.VAOForProgram(shadow_prog);
vao.Bind();
// FBO for offscreen rendering of the shadow map
Framebuffer::Target fbo_tgt = Framebuffer::Target::Draw;
Framebuffer fbo;
fbo.Bind(fbo_tgt);
Framebuffer::AttachTexture(fbo_tgt, FramebufferAttachment::Depth, shadow_map, 0);
// RBO for offscreen rendering
Renderbuffer::Target rbo_tgt = Renderbuffer::Target::Renderbuffer;
Renderbuffer rbo;
rbo.Bind(rbo_tgt);
Renderbuffer::Storage(rbo_tgt, PixelDataInternalFormat::RGBA, size, size);
Framebuffer::AttachRenderbuffer(fbo_tgt, FramebufferAttachment::Color, rbo);
// setup the matrices
shadow_prog.projection_matrix.Set(lt_proj);
shadow_prog.camera_matrix.Set(light);
// setup and clear the viewport
gl.Viewport(size, size);
gl.Clear().DepthBuffer();
// draw the meshes
gl.PolygonOffset(1.0, 1.0);
gl.Enable(Capability::PolygonOffsetFill);
meshes.Draw();
gl.Disable(Capability::PolygonOffsetFill);
gl.Finish();
// bind the default framebuffer
DefaultFramebuffer().Bind(Framebuffer::Target::Draw);
}
void RenderOnscreen(double)
{
screen_prog.Use();
screen.Use();
screen.Draw();
}
void operator()(void)
{
gl.Use(prog);
mesh.Use();
mesh.Draw();
}
