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patchzyy
34 lines
771 B
C
34 lines
771 B
C
#include <assert.h>
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#include <math.h>
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#include <dolphin/mtx/mtx44ext.h>
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void C_MTXPerspective(Mtx44 m, f32 fovY, f32 aspect, f32 n, f32 f) {
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f32 angle;
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f32 cot;
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f32 tmp;
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assert(m && "MTXPerspective(): NULL Mtx44Ptr 'm' ");
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assert((fovY > 0.0) && (fovY < 180.0) && "MTXPerspective(): 'fovY' out of range ");
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assert(0.0f != aspect && "MTXPerspective(): 'aspect' is 0 ");
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angle = (0.5f * fovY);
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angle = MTXDegToRad(angle);
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cot = 1 / tanf(angle);
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m[0][0] = (cot / aspect);
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m[0][1] = 0;
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m[0][2] = 0;
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m[0][3] = 0;
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m[1][0] = 0;
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m[1][1] = (cot);
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m[1][2] = 0;
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m[1][3] = 0;
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m[2][0] = 0;
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m[2][1] = 0;
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tmp = 1 / (f - n);
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m[2][2] = (-n * tmp);
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m[2][3] = (tmp * -(f * n));
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m[3][0] = 0;
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m[3][1] = 0;
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m[3][2] = -1;
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m[3][3] = 0;
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} |