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Add Transform4x4f::orthoProjection

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Tomas Jakobsson 2019-08-08 21:49:48 +02:00 committed by Tomas Jakobsson
parent e6660475e3
commit ce8b16aacf
2 changed files with 48 additions and 8 deletions
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39
es-core/src/math/Transform4x4f.cpp
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@ -49,6 +49,45 @@ const Vector3f Transform4x4f::operator*(const Vector3f& _other) const
} // operator*
Transform4x4f& Transform4x4f::orthoProjection(float _left, float _right, float _bottom, float _top, float _near, float _far)
{
float* tm = (float*)this;
const float o[6] = { 2 / (_right - _left),
2 / (_top - _bottom),
-2 / (_far - _near),
-(_right + _left) / (_right - _left),
-(_top + _bottom) / (_top - _bottom),
-(_far + _near) / (_far - _near) };
const float temp[12] = { tm[ 0] * o[0],
tm[ 1] * o[0],
tm[ 2] * o[0],
tm[ 4] * o[1],
tm[ 5] * o[1],
tm[ 6] * o[1],
tm[ 8] * o[2],
tm[ 9] * o[2],
tm[10] * o[2],
tm[ 0] * o[3] + tm[ 4] * o[4] + tm[ 8] * o[5] + tm[12],
tm[ 1] * o[3] + tm[ 5] * o[4] + tm[ 9] * o[5] + tm[13],
tm[ 2] * o[3] + tm[ 6] * o[4] + tm[10] * o[5] + tm[14] };
tm[ 0] = temp[ 0];
tm[ 1] = temp[ 1];
tm[ 2] = temp[ 2];
tm[ 4] = temp[ 3];
tm[ 5] = temp[ 4];
tm[ 6] = temp[ 5];
tm[ 8] = temp[ 6];
tm[ 9] = temp[ 7];
tm[10] = temp[ 8];
tm[12] = temp[ 9];
tm[13] = temp[10];
tm[14] = temp[11];
return *this;
} // orthoProjection
Transform4x4f& Transform4x4f::invert(const Transform4x4f& _other)
{
float* tm = (float*)this;

3
es-core/src/math/Transform4x4f.h
View file

@ -25,13 +25,14 @@ public:
inline const Vector4f& r2() const { return mR2; }
inline const Vector4f& r3() const { return mR3; }
Transform4x4f& orthoProjection(float _left, float _right, float _bottom, float _top, float _near, float _far);
Transform4x4f& invert (const Transform4x4f& _other);
Transform4x4f& scale (const Vector3f& _scale);
Transform4x4f& rotate (const float _angle, const Vector3f& _axis);
Transform4x4f& rotateX (const float _angle);
Transform4x4f& rotateY (const float _angle);
Transform4x4f& rotateZ (const float _angle);
Transform4x4f& translate(const Vector3f& _translation);
Transform4x4f& translate (const Vector3f& _translation);
Transform4x4f& round ();
inline Vector3f& translation() { return mR3.v3(); }