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charlie_craft

How to Get WorldViewProjection Matrix in OpenGL?

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my code: void display() { float WorldViewMatrix[16]; float ProjectionMatrix[16]; ... /////////////////////////////// //// the code to set the camera /////////////////////////////// glMatrixMode(GL_MODELVIEW); glGetFloatv(GL_MODELVIEW_MATRIX,WorldViewMatrix); glMatrixMode(GL_PROJECTION); glGetFloatv(GL_PROJECTION_MATRIX,ProjectionMatrix); cgSetMatrixParameterfr(cgp_WorldViewMatrix,WorldViewMatrix); cgSetMatrixParameterfr(cgp_ProjectionMatrix,ProjectionMatrix); cgUpdateProgramParameters(m_CGProgram); ... } CG file: vOutPut C2E1v_green(float3 position : POSITION ,const uniform float4x4 WorldView,const uniform float4x4 Projection) { vOutPut OUT; OUT.position = mul(WorldView, float4(position.xyz, 1.0)); OUT.position = mul(Projection,OUT.position); float dis = length(OUT.position); OUT.color = float4(0.0,1.0,0.0,1.0); return OUT; } but I can't get a normal scene.the scene was distorted . why? How to get the WorldViewProjection Matrix in OpenGL?

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