refactor shaders

src/graphics/render/Skybox.cpp

@@ -71,7 +71,7 @@ void Skybox::drawBackground(
     backShader->uniformMatrix("u_view", camera.getView(false));
     backShader->uniform1f("u_zoom", camera.zoom*camera.getFov()/(M_PI*0.5f));
     backShader->uniform1f("u_ar", float(width)/float(height));
-    backShader->uniform1i("u_cubemap", 1);
+    backShader->uniform1i("u_skybox", 1);
     bind();
     mesh->draw();
     unbind();

src/graphics/render/WorldRenderer.cpp

@@ -132,7 +132,7 @@ void WorldRenderer::setupWorldShader(
     shader.uniform1f("u_dayTime", level.getWorld()->getInfo().daytime);
     shader.uniform2f("u_lightDir", skybox->getLightDir());
     shader.uniform3f("u_cameraPos", camera.position);
-    shader.uniform1i("u_cubemap", 1);
+    shader.uniform1i("u_skybox", 1);
     shader.uniform1i("u_enableShadows", gbufferPipeline);
 
     if (gbufferPipeline) {