| public static project ( vec3 modelPosition, CSharpGL.mat4 view, CSharpGL.mat4 proj, vec4 viewport ) : vec3 | ||
| modelPosition | vec3 | The object. |
| view | CSharpGL.mat4 | The view. |
| proj | CSharpGL.mat4 | The proj. |
| viewport | vec4 | The viewport. |
| return | vec3 | |
public static vec3 project(vec3 modelPosition, mat4 view, mat4 proj, vec4 viewport)
{
vec4 tmp = new vec4(modelPosition, (1f));
tmp = view * tmp;
tmp = proj * tmp;// this is gl_Position
tmp /= tmp.w;// after this, tmp is normalized device coordinate.
tmp = tmp * 0.5f + new vec4(0.5f, 0.5f, 0.5f, 0.5f);
tmp[0] = tmp[0] * viewport[2] + viewport[0];
tmp[1] = tmp[1] * viewport[3] + viewport[1];// after this, tmp is window coordinate.
return new vec3(tmp.x, tmp.y, tmp.z);
}