//------------------------------------------------------------------------------
void Example::UpdateView(void)
{
float tx = view_center_x;
float ty = view_center_y;
float sa = oglplus::Sin(oglplus::Degrees(view_angle));
float ca = oglplus::Cos(oglplus::Degrees(view_angle));
float sx = view_width;
float sy = view_width/view_aspect;
oglplus::Mat3f t(
1.0f, 0.0f, tx,
0.0f, 1.0f, ty,
0.0f, 0.0f, 1.0f
);
oglplus::Mat3f r(
ca, sa, 0.0f,
-sa, ca, 0.0f,
0.0, 0.0, 1.0f
);
oglplus::Mat3f s(
sx, 0.0f, 0.0f,
0.0f, sy, 0.0f,
0.0f, 0.0f, 1.0f
);
view_matrix.Set(t*r*s);
}
void Render(void)
{
using namespace oglplus;
gl.Clear().ColorBuffer().DepthBuffer();
camera_matrix.Set(
CamMatrixf::Orbiting(
Vec3f(),
9.5 - SineWave(FrameTime() / 6.0) * 7.0,
FullCircles(FrameTime() / 9.0),
Degrees(SineWave(FrameTime() / 30.0) * 90)
)
);
model_matrix.Set(ModelMatrixf::RotationX(FullCircles(FrameTime() * 0.1)));
textured_cube.Draw();
}
void SpectraDefaultGPUMatrixTransf::BeginBatch() {
using namespace oglplus;
gl_canvas->SetCurrent(*gl_context);
transf_prog.Use();
Texture::Active(0);
matrix_tex.Bind(Texture::Target::Buffer);
prog_matrix_data.Set(0);
Texture::Active(1);
input_tex.Bind(Texture::Target::Buffer);
prog_input_data.Set(1);
prog_input_size.Set(int(in_size));
vao.Bind();
Context gl;
gl.Enable(Capability::RasterizerDiscard);
}
void Reshape(void)
{
using namespace oglplus;
gl.Viewport(Width(), Height());
projection_matrix.Set(
CamMatrixf::PerspectiveX(
Degrees(60),
Aspect(),
1, 50
)
);
}
unsigned SpectraDefaultGPUMatrixTransf::BeginTransform(
const float* input,
std::size_t inbufsize,
float* /*output*/,
std::size_t /*outbufsize*/
)
{
using namespace oglplus;
assert(inbufsize >= in_size);
if(current_transform >= max_transforms)
current_transform = 0;
input_buf.Bind(Buffer::Target::Texture);
Buffer::SubData(
Buffer::Target::Texture,
current_transform*in_size,
in_size,
input
);
prog_input_offs.Set(current_transform*in_size);
xfbs[current_transform].Bind();
Query::Activator qrya(
queries[current_transform],
Query::Target::TransformFeedbackPrimitivesWritten
);
TransformFeedback::Activator xfba(
TransformFeedbackPrimitiveType::Points
);
Context gl;
gl.DrawArrays(PrimitiveType::Points, 0, out_size);
xfba.Finish();
qrya.Finish();
TransformFeedback::BindDefault();
return current_transform++;
}