/**
* Erweitert die Geometrie um ein Vertexattribut vom Typ GL_FLOAT.
*
* @param index Index / Location des Attributs
* @param size Anzahl der Komponenten des Attributs
* @param offset Offset im Vertex gemessen in Byte
*/
public void addVertexAttribute(int index, int size, int offset) {
VertexAttribute attr = new VertexAttribute();
attr.index = index;
attr.size = size;
attr.offset = offset;
attributes.add(attr);
}
private int calculateOffsets() {
int count = 0;
for (int i = 0; i < attributes.length; i++) {
VertexAttribute attribute = attributes[i];
attribute.offset = count;
if (attribute.usage == VertexAttributes.Usage.ColorPacked) count += 4;
else count += 4 * attribute.numComponents;
}
return count;
}
