60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
#include <ultra64.h>
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#include "constants.h"
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#include "game/data/data_000000.h"
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#include "game/data/data_0083d0.h"
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#include "game/data/data_00e460.h"
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#include "game/data/data_0160b0.h"
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#include "game/data/data_01a3a0.h"
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#include "game/data/data_020df0.h"
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#include "game/data/data_02da90.h"
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#include "gvars/gvars.h"
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#include "lib/lib_04840.h"
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#include "lib/lib_16110.h"
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#include "lib/lib_4a360.h"
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#include "types.h"
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void guPerspectiveF(float mf[4][4], u16 *perspNorm, float fovy, float aspect, float near, float far, float scale)
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{
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float cot;
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int i, j;
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guMtxIdentF(mf);
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fovy *= 3.1415926f / 180.0f;
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cot = cosf(fovy * 0.5f) / sinf(fovy * 0.5f);
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mf[0][0] = cot / aspect;
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mf[1][1] = cot;
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mf[2][2] = (near + far) / (near - far);
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mf[2][3] = -1;
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mf[3][2] = (2.0f * near * far) / (near - far);
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mf[3][3] = 0;
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for (i = 0; i < 4; i++) {
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for (j = 0; j < 4; j++) {
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mf[i][j] *= scale;
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}
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}
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if (perspNorm != (u16 *) NULL) {
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if (near + far <= 2.0f) {
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*perspNorm = (u16) 0xFFFF;
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} else {
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*perspNorm = (u16) ((2.0f * 65536.0f) / (near + far));
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if (*perspNorm <= 0) {
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*perspNorm = (u16) 0x0001;
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}
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}
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}
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}
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void guPerspective(Mtx *m, u16 *perspNorm, float fovy, float aspect, float near, float far, float scale)
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{
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float mf[4][4];
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guPerspectiveF(mf, perspNorm, fovy, aspect, near, far, scale);
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guMtxF2L(mf, m);
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}
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