Image2D createImage(size3 size, cl_mem_flags flags = CL_MEM_READ_WRITE, typename ChannelType<T>::Type* host_ptr = NULL, size_t row_pitch = 0, size_t slice_pitch = 0)
{
cl_image_format format;
format.image_channel_order = O;
format.image_channel_data_type = T;
cl_int err;
cl_mem mem = clCreateImage3D(id(), flags, &format, size.s[0], size.s[1], size.s[2], row_pitch, slice_pitch, host_ptr, err);
CLPP_CHECK_ERROR(err);
return Image3D(mem);
}
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);
}
CloudExample(void)
: projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"in vec4 Position;"
"uniform mat4 CameraMatrix;"
"void main(void)"
"{"
" gl_Position = "
" CameraMatrix *"
" Position;"
"}"
);
// compile it
vs.Compile();
// Set the geometry shader source
gs.Source(
"#version 330\n"
"layout(points) in;"
"layout(triangle_strip, max_vertices = 100) out;"
"const int p = 25;"
"const float hp = (p-1)*0.5;"
"uniform vec3 LightPos;"
"uniform mat4 CameraMatrix, ProjectionMatrix;"
"out vec3 geomTexCoord;"
"out vec3 geomLightDir;"
"void main(void)"
"{"
" float s = 0.6;"
" float yo[2] = float[2](-1.0, 1.0);"
" float xo[2] = float[2](-1.0, 1.0);"
" vec3 cx = vec3("
" CameraMatrix[0][0],"
" CameraMatrix[1][0],"
" CameraMatrix[2][0] "
" );"
" vec3 cy = vec3("
" CameraMatrix[0][1],"
" CameraMatrix[1][1],"
" CameraMatrix[2][1] "
" );"
" vec3 cz = vec3("
" CameraMatrix[0][2],"
" CameraMatrix[1][2],"
" CameraMatrix[2][2] "
" );"
" for(int k=0;k!=p;++k)"
" {"
" for(int j=0;j!=2;++j)"
" for(int i=0;i!=2;++i)"
" {"
" float zo = ((k - hp) / hp);"
" float xoffs = xo[i]*s;"
" float yoffs = yo[j]*s;"
" float zoffs = zo *s;"
" vec4 v = vec4("
" gl_in[0].gl_Position.x+xoffs,"
" gl_in[0].gl_Position.y+yoffs,"
" gl_in[0].gl_Position.z+zoffs,"
" 1.0"
" );"
" gl_Position = ProjectionMatrix * v;"
" geomLightDir = LightPos - v.xyz;"
" geomTexCoord = "
" vec3(0.5, 0.5, 0.5)+"
" cx*(xo[i])*0.707+"
" cy*(yo[j])*0.707+"
" cz*(zo )*0.707;"
" EmitVertex();"
" }"
" EndPrimitive();"
" }"
"}"
);
// compile it
gs.Compile();
// set the fragment shader source
fs.Source(
"#version 330\n"
"uniform sampler3D cloudTex;"
"in vec3 geomTexCoord;"
"in vec3 geomLightDir;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float d = texture(cloudTex, geomTexCoord).r;"
" float o = 1.0;"
" float s = 2.0/128.0;"
" float r = s * 8.0;"
" vec3 sampleOffs = normalize(geomLightDir) * s;"
" vec3 samplePos = geomTexCoord;"
" if(d > 0.01) while(o > 0.0)"
" {"
" if(samplePos.x<0.0 || samplePos.x>1.0)"
" break;"
" if(samplePos.y<0.0 || samplePos.y>1.0)"
" break;"
" if(samplePos.z<0.0 || samplePos.z>1.0)"
" break;"
" o -= texture(cloudTex, samplePos).r*r;"
" samplePos += sampleOffs;"
" }"
" float a = 0.2 * d;"
" float i = mix(0.4, 1.0, o);"
" fragColor = vec4(i, i, i, a);"
"}"
);
// compile it
fs.Compile();
// attach the shaders to the program
prog.AttachShader(vs);
prog.AttachShader(gs);
prog.AttachShader(fs);
// link and use it
prog.Link();
prog.Use();
// bind the VAO for the clouds
clouds.Bind();
// bind the VBO for the cloud positions
buffer.Bind(Buffer::Target::Array);
{
GLfloat positions[3] = {0.5f, 0.1f, 0.2f};
Buffer::Data(Buffer::Target::Array, 3, positions);
VertexAttribArray attr(prog, "Position");
attr.Setup(3, DataType::Float);
attr.Enable();
}
{
Texture::Active(0);
UniformSampler(prog, "cloudTex").Set(0);
auto bound_tex = Bind(cloud_tex, Texture::Target::_3D);
bound_tex.Image3D(images::Cloud(128, 128, 128));
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.BorderColor(Vec4f(0.0f, 0.0f, 0.0f, 0.0f));
bound_tex.WrapS(TextureWrap::ClampToBorder);
bound_tex.WrapT(TextureWrap::ClampToBorder);
bound_tex.WrapR(TextureWrap::ClampToBorder);
}
Uniform<Vec3f>(prog, "LightPos").Set(Vec3f(10.0f, 1.0f, 5.0f));
gl.ClearColor(0.2f, 0.3f, 0.4f, 0.0f);
gl.ClearDepth(1.0f);
gl.Enable(Capability::DepthTest);
gl.Enable(Capability::Blend);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::OneMinusSrcAlpha);
}
CloudExample(const ExampleParams& params)
: sphere_instr(make_sphere.Instructions())
, sphere_indices(make_sphere.Indices())
, samples(25 + params.quality*params.quality*100)
, positions(make_positions())
, sizes(make_sizes())
, cloud_tex(positions.size())
, light_path(make_light_path_cps())
{
assert(positions.size() == sizes.size());
std::srand(123456);
light_vs.Source(
"#version 330\n"
"in vec3 Position;"
"uniform vec3 LightPos;"
"uniform mat4 CameraMatrix, ProjectionMatrix;"
"void main(void)"
"{"
" float s = 0.1;"
" gl_Position = "
" ProjectionMatrix*"
" CameraMatrix*"
" vec4(Position*s + LightPos, 1.0);"
"}"
).Compile();
light_fs.Source(
"#version 330\n"
"out vec4 fragLight;"
"void main(void)"
"{"
" fragLight = vec4(1.0, 1.0, 1.0, 1.0);"
"}"
).Compile();
light_prog << light_vs << light_fs;
light_prog.Link().Use();
light.Bind();
buffer.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_sphere.Positions(data);
Buffer::Data(Buffer::Target::Array, data);
(light_prog|"Position").Setup(n_per_vertex, DataType::Float).Enable();
}
cloud_vs.Source(
"#version 330\n"
"in vec4 Position;"
"in float Size;"
"uniform int SampleCount;"
"uniform mat4 CameraMatrix;"
"uniform vec4 ViewZ;"
"out float vertZOffs;"
"out float vertSize;"
"void main(void)"
"{"
" float hp = (SampleCount-1) * 0.5;"
" vertZOffs = (gl_InstanceID - hp)/hp;"
" vertSize = Size;"
" gl_Position = vec4("
" Position.xyz +"
" ViewZ.xyz*vertZOffs*Size*0.5,"
" 1.0"
" );"
"}"
).Compile();
cloud_gs.Source(
"#version 330\n"
"layout(points) in;"
"layout(triangle_strip, max_vertices = 4) out;"
"in float vertZOffs[];"
"in float vertSize[];"
"uniform vec3 LightPos;"
"uniform mat4 CameraMatrix, ProjectionMatrix;"
"uniform vec4 ViewX, ViewY, ViewZ;"
"out vec3 geomTexCoord;"
"out vec3 geomLightDir;"
"void main(void)"
"{"
" float zo = vertZOffs[0];"
" float s = vertSize[0];"
" float yo[2] = float[2](-1.0, 1.0);"
" float xo[2] = float[2](-1.0, 1.0);"
" for(int j=0;j!=2;++j)"
" for(int i=0;i!=2;++i)"
" {"
" vec4 v = vec4("
" gl_in[0].gl_Position.xyz+"
" ViewX.xyz * xo[i] * s * 0.5+"
" ViewY.xyz * yo[j] * s * 0.5,"
" 1.0"
" );"
" gl_Position = ProjectionMatrix * CameraMatrix * v;"
" geomLightDir = LightPos - v.xyz;"
" geomTexCoord = "
" vec3(0.5, 0.5, 0.5)+"
" ViewX.xyz*(xo[i])*0.707+"
" ViewY.xyz*(yo[j])*0.707+"
" ViewZ.xyz*(zo )*0.707;"
" EmitVertex();"
" }"
" EndPrimitive();"
"}"
).Compile();
cloud_fs.Source(
"#version 330\n"
"uniform sampler3D CloudTex;"
"in vec3 geomTexCoord;"
"in vec3 geomLightDir;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float d = texture(CloudTex, geomTexCoord).r;"
" float o = 1.0;"
" float s = 2.0/128.0;"
" float r = s * 8.0;"
" vec3 sampleOffs = normalize(geomLightDir) * s;"
" vec3 samplePos = geomTexCoord;"
" if(d > 0.01) while(o > 0.0)"
" {"
" if(samplePos.x<0.0 || samplePos.x>1.0)"
" break;"
" if(samplePos.y<0.0 || samplePos.y>1.0)"
" break;"
" if(samplePos.z<0.0 || samplePos.z>1.0)"
" break;"
" o -= texture(CloudTex, samplePos).r*r;"
" samplePos += sampleOffs;"
" }"
" float a = 0.4 * d;"
" float i = mix(0.2, 1.0, o);"
" fragColor = vec4(i, i, i, a);"
"}"
).Compile();
cloud_prog << cloud_vs << cloud_gs << cloud_fs;
cloud_prog.Link().Use();
// bind the VAO for the clouds
clouds.Bind();
// bind the VBO for the cloud positions
pos_buffer.Bind(Buffer::Target::Array);
{
Buffer::Data(Buffer::Target::Array, positions);
(cloud_prog|"Position").Setup(3, DataType::Float).Enable();
}
// bind the VBO for the cloud sizes
size_buffer.Bind(Buffer::Target::Array);
{
Buffer::Data(Buffer::Target::Array, sizes);
(cloud_prog|"Size").Setup(1, DataType::Float).Enable();
}
// set the number of samples
cloud_prog/"SampleCount" = GLint(samples);
Texture::Active(0);
cloud_prog/"CloudTex" = 0;
for(std::size_t i=0, n=positions.size(); i!=n; ++i)
{
auto bound_tex = Bind(cloud_tex[i], Texture::Target::_3D);
bound_tex.Image3D(
images::Cloud(
128, 128, 128,
Vec3f(0.1f, -0.5f, 0.3f),
0.5f
)
);
bound_tex.GenerateMipmap();
bound_tex.MinFilter(TextureMinFilter::LinearMipmapLinear);
bound_tex.MagFilter(TextureMagFilter::Linear);
bound_tex.BorderColor(Vec4f(0.0f, 0.0f, 0.0f, 0.0f));
bound_tex.WrapS(TextureWrap::ClampToBorder);
bound_tex.WrapT(TextureWrap::ClampToBorder);
bound_tex.WrapR(TextureWrap::ClampToBorder);
}
gl.ClearColor(0.0f, 0.1f, 0.2f, 0.0f);
gl.ClearDepth(1.0f);
gl.Disable(Capability::DepthTest);
gl.Enable(Capability::Blend);
gl.BlendFunc(BlendFn::SrcAlpha, BlendFn::OneMinusSrcAlpha);
}
