The flame shader now only turns on when facing an enemy. Next is tagging enemies with specific shaders to apply at a specific time.

tools/fragviewer.cpp

@@ -84,7 +84,7 @@ int main(int argc, char *argv[]) {
     sf::Vector2f scale{u_resolution.x / bounds.size.x,
       u_resolution.y / bounds.size.y};
     sprite_texture.sprite->setScale(scale);
-    shader.setUniform("texture", sf::Shader::CurrentTexture);
+    shader.setUniform("source", sf::Shader::CurrentTexture);
   } else {
     rect.setPosition({0,0});
     rect.setSize(u_resolution);