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Fixed perspective with zNear == 0 (#71)

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This commit is contained in:
Christophe Riccio
2013-05-12 15:36:29 +02:00
parent 1c68cee29b
commit 01a98e97c1
4 changed files with 9 additions and 14 deletions
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10
glm/gtc/matrix_transform.inl
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@@ -243,15 +243,11 @@ namespace glm
#else
valType const rad = glm::radians(fovy);
#endif
valType range = tan(rad / valType(2)) * zNear;
valType left = -range * aspect;
valType right = range * aspect;
valType bottom = -range;
valType top = range;
valType tanHalfFovy = tan(rad / valType(2));
detail::tmat4x4<valType, defaultp> Result(valType(0));
Result[0][0] = (valType(2) * zNear) / (right - left);
Result[1][1] = (valType(2) * zNear) / (top - bottom);
Result[0][0] = valType(1) / (aspect * tanHalfFovy);
Result[1][1] = valType(1) / (tanHalfFovy);
Result[2][2] = - (zFar + zNear) / (zFar - zNear);
Result[2][3] = - valType(1);
Result[3][2] = - (valType(2) * zFar * zNear) / (zFar - zNear);