2023-10-02 23:59:48 +02:00
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#include "helper.h"
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2023-10-05 23:02:23 +02:00
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Matrix4x4 orthographic_projection_2d(float left, float right, float bottom, float top) {
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2023-10-02 23:59:48 +02:00
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Matrix4x4 result;
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// Identity matrix
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for (int i = 0; i < 4; i++) {
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for (int j = 0; j < 4; j++) {
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result.m[i][j] = 0.0f;
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}
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}
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result.m[0][0] = 2.0f / (right - left);
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result.m[3][0] = -(right + left) / (right - left);
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result.m[1][1] = 2.0f / (top - bottom);
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result.m[3][1] = -(top + bottom) / (top - bottom);
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result.m[2][2] = -1.0f;
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result.m[3][3] = 1.0f;
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return result;
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}
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