Method equiRectangularToCubeMap

src/cubeMap.cpp:186–204

Transform an equirectangular map to a six sided cubemap

//Transform an equirectangular map to a six sided cubemap
void CubeMap::equiRectangularToCubeMap(const unsigned int equirectangularMap,
                                       const int resolution, const Shader &transformShader){
    transformShader.use();
    transformShader.setInt("equirectangularMap", 0);
    transformShader.setMat4("projection", captureProjection);

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, equirectangularMap);
    glViewport(0, 0, resolution, resolution);

    for(unsigned int i = 0; i < numSidesInCube; i++){
        transformShader.setMat4("view", captureViews[i]);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 
                               GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, textureID, 0);

        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        drawCube();
    }
}

//This function seems kind of useless, I should check to see if it is being inlined away
//by the compiler and think of better ways to do this