leozimmerman / shaderslibrary Goto Github PK

Hi Leo, I cannot understand how lights positions work, it look they always follow 3D objects rotations, even if you don't update their positions.

1. go to 1-PhongShading example
2. in ofApp::update() comment updateLights() - now light position should never change
3. in ofApp::drawScene() comment box small and box big - so you can understand better my issue
4. launch the app and switch on the pointLight. You see that pointLight is rotating around the sphere, while it should keep its original position

Thanks,

Paolo

When using in OF 0.9.7 this code

ofMatrix4x4 normalMatrix = ofMatrix4x4::getTransposedOf(cam->getModelViewMatrix().getInverse());

Should be converted to the new GLM syntax

glm::mat4 mvMatrix = cam.getModelViewMatrix();
auto normalMatrix = glm::transpose(glm::inverse(mvMatrix));