//! Drawable:: Called after drawing
void BillboardParticles::postDraw(SceneRenderer & renderer)
{
renderer.setDepthMask(true);
renderer.setBlend(false);
renderer.getProgram().disableArrayPtr("in_position");
renderer.getProgram().disableArrayPtr("in_texcoord");
renderer.getProgram().disableArrayPtr("in_color");
}
//! Drawable:: Draw one occurrence
void BillboardParticles::drawOccurrence(SceneRenderer & renderer, SceneNode & node)
{
Mat4 model_view = node.getScene().getCamera().getTransform() * node.getCachedTransformRef();
Mat4 model_view_projection = node.getScene().getCamera().getProjection() * model_view;
renderer.getProgram().setParamMat4("model_view_projection_matrix", model_view_projection);
renderer.getProgram().setVertexData(vbo.get(), current_node * sizeof(VertexTemplate) * particle_count * 4);
renderer.drawElements(GL_TRIANGLE_STRIP, particle_count * 6, ibo);
current_node++;
}
//! Drawable:: Called upon drawing
void BillboardParticles::preDraw(SceneRenderer & renderer)
{
renderer.useProgram("BillboardParticleShader.shader");
renderer.setDepthMask(false);
renderer.setBlend(true);
renderer.setBlendFunc(GL_SRC_ALPHA, GL_ONE);
renderer.useTexture(emitter->properties->texture);
renderer.getProgram().setVertexData(tbo.get());
current_node = 0;
}
