Setup multiple target basic shaders

src/Render.hs

@@ -35,20 +35,22 @@ createLightMap pdata lightPoints nWalls nSils nsurfVs = do
     -- clear buffer to full alpha and furthest depth
     -- clearColor is specified in preloadRender
     clearColor $= Color4 1 1 1 1
-    clear [ColorBuffer,DepthBuffer]
-    --colorMask $= Color4 Disabled Disabled Disabled Disabled
-    cullFace $= Just Back
-    cullFace $= Nothing
-    -- we assume that the camera position uniforms have been correctly set elsewhere
-    -- draw wall surfaces from the camera's point of view in order to set z buffer
-    drawShader (_lightingWallShader pdata) nWalls
-    -- draw foreground elements the camera's your point of view to set z buffer
-    drawShader (_lightingSurfaceShader pdata) nsurfVs 
-    -- draw wall occlusions from the camera's point of view
-    drawShader (_lightingOccludeShader pdata) nWalls
-    --hypothesis: the above three draw calls only work because the
-    --uniform was set to your position, that being the last light source in the list
-    --if this hypothesis is correct, then the code is brittle and should be changed
+    clear [ColorBuffer]
+    -- we assume that the renderbuffer's depth has been correctly set elsewhere
+--    clear [ColorBuffer,DepthBuffer]
+--    --colorMask $= Color4 Disabled Disabled Disabled Disabled
+--    cullFace $= Just Back
+--    cullFace $= Nothing
+--    -- we assume that the camera position uniforms have been correctly set elsewhere
+--    -- draw wall surfaces from the camera's point of view in order to set z buffer
+--    drawShader (_lightingWallShader pdata) nWalls
+--    -- draw foreground elements the camera's your point of view to set z buffer
+--    drawShader (_lightingSurfaceShader pdata) nsurfVs 
+--    -- draw wall occlusions from the camera's point of view
+--    drawShader (_lightingOccludeShader pdata) nWalls
+--    --hypothesis: the above three draw calls only work because the
+--    --uniform was set to your position, that being the last light source in the list
+--    --if this hypothesis is correct, then the code is brittle and should be changed
     
     -- for each of the lights: 
     -- stencil out the walls from this light's point of view