SphereExample(void)
: sphere_instr(make_sphere.Instructions())
, sphere_indices(make_sphere.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
{
// Vertex shader
VertexShader vs;
// Set the vertex shader source and compile it
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix;"
"layout(location = 0) in vec4 Position;"
"layout(location = 1) in vec2 TexCoord;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" vertTexCoord = TexCoord;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" Position;"
"}"
).Compile();
// Fragment shader
FragmentShader fs;
// set the fragment shader source and compile it
fs.Source(
"#version 330\n"
"in vec2 vertTexCoord;"
"out vec4 fragColor;"
"void main(void)"
"{"
" float i = ("
" int(vertTexCoord.x*18) % 2+"
" int(vertTexCoord.y*14) % 2"
" ) % 2;"
" fragColor = vec4(1-i/2, 1-i/2, 1-i/2, 1.0);"
"}"
).Compile();
// attach the shaders to the program
prog.AttachShader(vs).AttachShader(fs);
// link and use it
prog.Link().Use();
// 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
// (prog|0) is equivalent to VertexAttribArray(prog, VertexAtribSlot(0))
(prog|0).Setup<GLfloat>(n_per_vertex).Enable();
}
// bind the VBO for the sphere UV-coordinates
texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_sphere.TexCoordinates(data);
// upload the data
Buffer::Data(Buffer::Target::Array, data);
// setup the vertex attribs array for the vertices
// (prog|1) is equivalent to VertexAttribArray(prog, VertexAtribSlot(1))
(prog|1).Setup<GLfloat>(n_per_vertex).Enable();
}
//
gl.ClearColor(0.8f, 0.8f, 0.7f, 0.0f);
gl.ClearDepth(1.0f);
Capability::DepthTest << true;
}
SphereExample(void)
: sphere_instr(make_sphere.Instructions())
, sphere_indices(make_sphere.Indices())
, projection_matrix(prog, "ProjectionMatrix")
, camera_matrix(prog, "CameraMatrix")
, model_matrix(prog, "ModelMatrix")
{
// Set the vertex shader source
vs.Source(
"#version 330\n"
"uniform mat4 ProjectionMatrix, CameraMatrix, ModelMatrix;"
"in vec4 Position;"
"in vec2 TexCoord;"
"out vec2 vertTexCoord;"
"void main(void)"
"{"
" vertTexCoord = TexCoord;"
" gl_Position = "
" ProjectionMatrix *"
" CameraMatrix *"
" ModelMatrix *"
" 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 = int(("
" vertTexCoord.x+"
" vertTexCoord.y "
" )*16) % 2;"
" fragColor = mix("
" vec4(0.9, 0.9, 0.9, 1.0),"
" vec4(1.0, 0.3, 0.4, 1.0),"
" i"
" );"
"}"
);
// 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 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(n_per_vertex, DataType::Float);
attr.Enable();
}
// bind the VBO for the sphere UV-coordinates
texcoords.Bind(Buffer::Target::Array);
{
std::vector<GLfloat> data;
GLuint n_per_vertex = make_sphere.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);
}