Refactors to support fog volume rendering

Runtime/Graphics/Shaders/CFogVolumePlaneShader.hpp

@@ -0,0 +1,40 @@
+#ifndef __URDE_CFOGVOLUMEPLANESHADER_HPP__
+#define __URDE_CFOGVOLUMEPLANESHADER_HPP__
+
+#include "TShader.hpp"
+#include "zeus/CMatrix4f.hpp"
+#include "zeus/CColor.hpp"
+#include "zeus/CRectangle.hpp"
+#include "zeus/CVector4f.hpp"
+
+namespace urde
+{
+
+class CFogVolumePlaneShader
+{
+    friend struct CFogVolumePlaneShaderGLDataBindingFactory;
+    friend struct CFogVolumePlaneShaderVulkanDataBindingFactory;
+    friend struct CFogVolumePlaneShaderMetalDataBindingFactory;
+    friend struct CFogVolumePlaneShaderD3DDataBindingFactory;
+
+    boo::GraphicsDataToken m_token;
+    boo::IGraphicsBufferD* m_vbo;
+    boo::IShaderDataBinding* m_dataBinds[4];
+    std::vector<zeus::CVector4f> m_verts;
+    size_t m_vertCapacity = 0;
+
+    void CommitResources(size_t capacity);
+
+public:
+    static const zeus::CRectangle DefaultRect;
+    void reset(int numVerts) { m_verts.clear(); m_verts.reserve(numVerts); }
+    void addFan(const zeus::CVector3f* verts, int numVerts);
+    void draw(int pass);
+
+    using _CLS = CFogVolumePlaneShader;
+#include "TShaderDecl.hpp"
+};
+
+}
+
+#endif // __URDE_CFOGVOLUMEPLANESHADER_HPP__