diff --git a/src/rlgl.c b/src/rlgl.c index fa57e9ac..d3ffdd8b 100644 --- a/src/rlgl.c +++ b/src/rlgl.c @@ -2651,6 +2651,46 @@ void SetOculusView(int eye) // Setup viewport and projection/modelview matrices using tracking data rlViewport(eye*screenWidth/2, 0, screenWidth/2, screenHeight); + float hmdIPD = 0.064f; + float hmdHScreenSize = 0.14976f; + float hmdVScreenSize = 0.0936f; + //float hmdVScreenCenter = 0.04675f; + float hmdEyeToScreenDistance = 0.041f; + float hmdLensSeparationDistance = 0.064f; + + //NOTE: fovy value hardcoded to 60 degrees (Oculus Rift CV1 vertical FOV is 100 degrees) + //float halfScreenDistance = hmdVScreenSize/2.0f; + //float yfov = 2.0f*atan(halfScreenDistance/hmdEyeToScreenDistance); + + float viewCenter = (float)hmdHScreenSize*0.25f; + float eyeProjectionShift = viewCenter - hmdLensSeparationDistance*0.5f; + float projectionCenterOffset = 4.0f*eyeProjectionShift/(float)hmdHScreenSize; + + + // The matrixes for offsetting the projection and view for each eye, to achieve stereo effect + Vector3 projectionOffset = { -projectionCenterOffset, 0.0f, 0.0f }; + Vector3 viewOffset = { -hmdIPD/2.0f, 0.0f, 0.0f }; + + // Negate the left eye versions + if (eye == 1) + { + projectionOffset.x *= -1.0f; + viewOffset.x *= -1.0f; + } + + // Adjust the view and projection matrixes + // View matrix is translated based on the eye offset + Matrix projCenter = MatrixPerspective(60.0, (double)((float)screenWidth*0.5f)/(double)screenHeight, 0.01, 1000.0); + + Matrix projTranslation = MatrixTranslate(projectionOffset.x, projectionOffset.y, projectionOffset.z); + Matrix viewTranslation = MatrixTranslate(viewOffset.x, viewOffset.y, viewOffset.z); + + eyeProjection = MatrixMultiply(projCenter, projTranslation); // projection + eyeModelView = MatrixMultiply(modelview, viewTranslation); // modelview + + MatrixTranspose(&eyeProjection); + + /* // NOTE: fovy value hardcoded to 60 degrees (Oculus Rift CV1 vertical FOV is 100 degrees) eyeProjection = MatrixPerspective(60.0, (double)(screenWidth/2)/(double)screenHeight, 0.01, 1000.0); MatrixTranspose(&eyeProjection); @@ -2659,6 +2699,7 @@ void SetOculusView(int eye) Matrix eyeView = MatrixIdentity(); eyeModelView = MatrixMultiply(modelview, eyeView); + */ } SetMatrixModelview(eyeModelView);