void GridRenderer::init(ShaderProgram* prog)
{
_vbo = make_resource<VBO>(getResourceManager(),
"P");
_vbo->overrideIndex(getResourceManager()->geometryCache()->getIndexForAttribute("P"));
_vbo->bind();
prog->bindAttributeLocation(_vbo.get());
VertexList verts;
for(int x = 0; x <= _xres; x++) {
float nx = ((float)x) / _xres;
nx *= 2;
nx -= 1;
verts.emplace_back(nx * _width / 2, - (_height / 2), 0);
verts.emplace_back(nx * _width / 2, (_height / 2), 0);
}
for(int y = 0; y <= _yres; y++) {
float ny = ((float)y) / _yres;
ny *= 2;
ny -= 1;
verts.emplace_back(- _width / 2, ny * _height / 2, 0);
verts.emplace_back(_width / 2, ny * _height / 2, 0);
}
_vbo->data(verts);
_vbo->setPointer();
}
void SphereRenderer::init(ShaderProgram* prog)
{
if(_vbo) {
_vbo->bind();
_vbo->setPointer();
return;
}
_vbo = make_resource<VBO>(getResourceManager(),
"P");
_vbo->overrideIndex(getResourceManager()->geometryCache()->getIndexForAttribute("P"));
_ibo = make_resource<IBO>(getResourceManager());
_vbo->bind();
_ibo->bind();
prog->bindAttributeLocation(_vbo.get());
auto polygons = std::make_shared<PolygonList>();
VertexList verts;
verts.emplace_back(0, 1, 0);
verts.emplace_back(0, -1, 0);
for(int i=1; i < _u_segments; i++) {
float u = float(i) / _u_segments;
float circle_radius = sin(PI * u);
float height = cos(PI * u);
for(int j=0; j <= _v_segments; j++) {
float pni = 2 * PI * float(j) / _v_segments;
verts.emplace_back(sin(pni) * circle_radius,
height,
cos(pni) * circle_radius);
}
}
for(uint i = 2; i < _v_segments + 1; i += 3) {
polygons->emplace_back(Polygon{(i + 1) % _v_segments, i, 0});
uint offset = (_u_segments - 1) * _v_segments + 2;
//polygons->emplace_back(Polygon{1, i + offset, i+1 + offset});
}
_ibo->data(polygons);
_vbo->data(verts);
_vbo->setPointer();
}
void SinglePointRenderer::init(ShaderProgram* prog)
{
if(_vbo) {
_vbo->bind();
_vbo->setPointer();
return;
}
_vbo = make_resource<VBO>(getResourceManager(),
"P");
_vbo->overrideIndex(getResourceManager()->geometryCache()->getIndexForAttribute("P"));
_vbo->bind();
prog->bindAttributeLocation(_vbo.get());
VertexList verts;
verts.emplace_back(0, 0, 0);
_vbo->data(verts);
_vbo->setPointer();
}
