/**
* Renders entieis to the shadow map. Each model is first bound and then all of the entities using
* that model are rendered to the shadow map.
*
* @param entities - the entities to be rendered to the shadow map.
*/
protected void render(Map<TexturedModel, List<Entity>> entities) {
for (TexturedModel model : entities.keySet()) {
RawModel rawModel = model.getRawModel();
bindModel(rawModel);
GL13.glActiveTexture(GL13.GL_TEXTURE0);
GL11.glBindTexture(GL11.GL_TEXTURE_2D, model.getTexture().getID());
if (model.getTexture().hasTransparency()) MasterRenderer.disableCulling();
for (Entity entity : entities.get(model)) {
prepareInstance(entity);
GL11.glDrawElements(GL11.GL_TRIANGLES, rawModel.getVertexCount(), GL11.GL_UNSIGNED_INT, 0);
}
if (model.getTexture().hasTransparency()) MasterRenderer.enableCulling();
}
GL20.glDisableVertexAttribArray(0);
GL20.glDisableVertexAttribArray(1);
GL30.glBindVertexArray(0);
}
/**
* Binds a raw model before rendering. Only the attribute 0 is enabled here because that is where
* the positions are stored in the VAO, and only the positions are required in the vertex shader.
*
* @param rawModel - the model to be bound.
*/
private void bindModel(RawModel rawModel) {
GL30.glBindVertexArray(rawModel.getVaoID());
GL20.glEnableVertexAttribArray(0);
GL20.glEnableVertexAttribArray(1);
}