67 lines
1.5 KiB
C++
67 lines
1.5 KiB
C++
#pragma once
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#include <glm/mat2x2.hpp>
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#include <glm/mat3x3.hpp>
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#include <glm/mat4x4.hpp>
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namespace Seele {
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typedef glm::mat2 Matrix2;
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typedef glm::mat3 Matrix3;
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typedef glm::mat4 Matrix4;
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static Matrix4 perspectiveProjection(float fov, float aspect, float nearPlane, float farPlane) {
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const float e = 1.0f / std::tan(fov * 0.5f);
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return {
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{
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e / aspect,
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0.0f,
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0.0f,
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0.0f,
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},
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{
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0.0f,
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-e,
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0.0f,
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0.0f,
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},
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{
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0.0f,
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0.0f,
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(nearPlane + farPlane) / (nearPlane - farPlane),
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-1.0f,
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},
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{
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0.0f,
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0.0f,
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(farPlane * nearPlane) / (nearPlane - farPlane),
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0.0f,
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},
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};
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}
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static Matrix4 orthographicProjection(float left, float right, float bottom, float top, float nearPlane, float farPlane) {
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return Matrix4{
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{
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2.0f / (right - left),
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0.0f,
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0.0f,
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0.0f,
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},
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{
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0.0f,
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2.0f / (top - bottom),
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0.0f,
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0.0f,
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},
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{
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0.0f,
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0.0f,
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-2.0f / (nearPlane - farPlane),
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0.0f,
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},
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{
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-(right + left) / (right - left),
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-(top + bottom) / (top - bottom),
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-(nearPlane + farPlane) / (nearPlane - farPlane),
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1.0f,
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},
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};
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}
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} // namespace Seele
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