Kevin Trogant
7054c965a4
- Deferred renderer (forward) - Loading models (temp) - Started towards differentiation
83 lines
1.3 KiB
C
83 lines
1.3 KiB
C
#ifndef DIFFREN_MATH_H
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#define DIFFREN_MATH_H
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/* Math definitions */
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/* 3d float vector */
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typedef union {
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struct {
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float x;
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float y;
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float z;
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};
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float e[3];
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} V3;
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/* 2d float vector */
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typedef union {
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struct {
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float x;
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float y;
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};
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float e[2];
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} V2;
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/* 4d float vector */
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typedef union {
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struct {
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float x;
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float y;
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float z;
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float w;
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};
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float e[4];
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} V4;
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/* 4x4 float matrix */
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typedef union {
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V4 columns[4];
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float e[4 * 4];
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} M4;
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inline V3 V3Sub(V3 a, V3 b) {
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V3 s;
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for (int i = 0; i < 3; ++i)
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s.e[i] = a.e[i] - b.e[i];
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return s;
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}
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inline V3 V3Add(V3 a, V3 b) {
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V3 s;
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for (int i = 0; i < 3; ++i)
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s.e[i] = a.e[i] + b.e[i];
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return s;
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}
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inline V3 V3Cross(V3 a, V3 b) {
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V3 r;
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r.x = a.y * b.z - a.z * b.y;
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r.y = a.z * b.x - a.x * b.z;
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r.z = a.x * b.y - a.y * b.x;
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return r;
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}
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inline float DegToRad(float deg) {
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return deg * (3.1415926f / 180.f);
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}
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V3 V3Norm(V3 v);
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M4 LookAt(V3 eye, V3 center, V3 up);
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M4 Perspective(float y_fov, float aspect, float n, float f);
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M4 M4Mul(M4 a, M4 b);
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M4 M4Identity(void);
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M4 M4Translate(float x, float y, float z);
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M4 M4Rotate(float x, float y, float z, float angle);
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#endif
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