28 lines
829 B
C
28 lines
829 B
C
#include "libultra_internal.h"
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void guOrthoF(float m[4][4], float left, float right, float bottom, float top, float near, float far,
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float scale) {
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int row;
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int col;
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guMtxIdentF(m);
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m[0][0] = 2 / (right - left);
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m[1][1] = 2 / (top - bottom);
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m[2][2] = -2 / (far - near);
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m[3][0] = -(right + left) / (right - left);
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m[3][1] = -(top + bottom) / (top - bottom);
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m[3][2] = -(far + near) / (far - near);
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m[3][3] = 1;
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for (row = 0; row < 4; row++) {
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for (col = 0; col < 4; col++) {
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m[row][col] *= scale;
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}
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}
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}
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void guOrtho(Mtx *m, float left, float right, float bottom, float top, float near, float far,
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float scale) {
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float sp28[4][4];
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guOrthoF(sp28, left, right, bottom, top, near, far, scale);
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guMtxF2L(sp28, m);
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}
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