void Render(double time)
{
std::size_t metaball_count = ball_paths.size(), k = 0;
std::vector<GLfloat> metaballs(metaball_count*4);
for(std::size_t ball=0; ball != metaball_count; ++ball)
{
Vec4f pos = ball_paths[ball].Position(time / 10.0);
for(std::size_t coord=0; coord != 4; ++coord)
metaballs[k++] = pos.At(coord);
}
Texture::Image1D(
Texture::Target::_1D,
0,
PixelDataInternalFormat::RGBA32F,
metaball_count,
0,
PixelDataFormat::RGBA,
PixelDataType::Float,
metaballs.data()
);
gl.Clear().DepthBuffer();
gl.DrawArrays(PrimitiveType::TriangleStrip, 0, 4);
}
void UpdateMetaballs(double time) {
std::size_t metaball_count = ball_paths.size(), k = 0;
std::vector<GLfloat> metaballs(metaball_count * 4);
for(std::size_t ball = 0; ball != metaball_count; ++ball) {
Vec4f pos = ball_paths[ball].Position(time / 21.0);
for(GLuint coord = 0; coord != 4; ++coord)
metaballs[k++] = pos.At(coord);
}
gl.Bound(Texture::Target::_1D, metaballs_tex)
.Image1D(
0,
PixelDataInternalFormat::RGBA32F,
metaball_count,
0,
PixelDataFormat::RGBA,
PixelDataType::Float,
metaballs.data());
}