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Added eyes projection/view matrices calculation

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Based on HMD parameters (IPD, ScreenSize, LesnsSeparation...)
This commit is contained in:
raysan5 2016-06-27 20:10:28 +02:00
parent be61d2f8c1
commit 308fcbb96c
1 changed files with 41 additions and 0 deletions
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41
src/rlgl.c
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@ -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);