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自我感觉良好的优化，其实没啥用

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This commit is contained in:
HuYingzhuo 2019-04-23 11:21:08 +08:00
parent 215b58de0b
commit b3e29cded7
1 changed files with 21 additions and 25 deletions
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40
inc/hgl/math/MathMGL.h
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@ -126,18 +126,15 @@ namespace hgl
float near_plane, float near_plane,
float far_plane ) float far_plane )
{ {
Matrix4f orthographic_projection_matrix = return Matrix4f(
{
2.0f / (right_plane - left_plane), 0.0f, 0.0f, -(right_plane + left_plane) / (right_plane - left_plane), 2.0f / (right_plane - left_plane), 0.0f, 0.0f, -(right_plane + left_plane) / (right_plane - left_plane),
0.0f, 2.0f / (bottom_plane - top_plane), 0.0f, -(bottom_plane + top_plane) / (bottom_plane - top_plane), 0.0f, 2.0f / (bottom_plane - top_plane), 0.0f, -(bottom_plane + top_plane) / (bottom_plane - top_plane),
0.0f, 0.0f, 1.0f / (near_plane - far_plane),near_plane / (near_plane - far_plane), 0.0f, 0.0f, 1.0f / (near_plane - far_plane),near_plane / (near_plane - far_plane),
0.0f,0.0f,0.0f,1.0f 0.0f, 0.0f, 0.0f, 1.0f);
};
return orthographic_projection_matrix;
} }
/** /**
* 生成一个2D正角视图矩阵 * 生成一个正角视图矩阵
* @param width 宽 * @param width 宽
* @param height 高 * @param height 高
* @param znear 近平面z值 * @param znear 近平面z值
@ -145,33 +142,32 @@ namespace hgl
*/ */
inline Matrix4f ortho(float width,float height,float znear=0,float zfar=1) inline Matrix4f ortho(float width,float height,float znear=0,float zfar=1)
{ {
Matrix4f orthographic_projection_matrix = return Matrix4f(
{
2.0f / width, 0.0f, 0.0f, -1, 2.0f / width, 0.0f, 0.0f, -1,
0.0f, 2.0f / height, 0.0f, -1, 0.0f, 2.0f / height, 0.0f, -1,
0.0f, 0.0f, 1.0f / (znear - zfar), znear / (znear - zfar), 0.0f, 0.0f, 1.0f / (znear - zfar), znear / (znear - zfar),
0.0f, 0.0f, 0.0f, 1.0f 0.0f, 0.0f, 0.0f, 1.0f);
};
return orthographic_projection_matrix;
} }
/**
* 生成一个透视矩阵
* @param aspect_ratio 宽高比
* @param field_of_view 视野
* @param near_plane 近截面
* @param far_plane 远截面
*/
inline Matrix4f perspective(float aspect_ratio, inline Matrix4f perspective(float aspect_ratio,
float field_of_view, float field_of_view=45.0f,
float near_plane, float near_plane=0.0f,
float far_plane ) float far_plane=1.0f)
{ {
const float f = 1.0f / tan( hgl_ang2rad( 0.5f * field_of_view ) ); const float f = 1.0f / tan( hgl_ang2rad( 0.5f * field_of_view ) );
Matrix4f perspective_projection_matrix = return Matrix4f(
{
f / aspect_ratio, 0.0f, 0.0f, 0.0f, f / aspect_ratio, 0.0f, 0.0f, 0.0f,
0.0f, -f, 0.0f, 0.0f, 0.0f, -f, 0.0f, 0.0f,
0.0f, 0.0f, far_plane / (near_plane - far_plane), (near_plane * far_plane) / (near_plane - far_plane), 0.0f, 0.0f, far_plane / (near_plane - far_plane), (near_plane * far_plane) / (near_plane - far_plane),
0.0f, 0.0f, -1.0f, 0.0f 0.0f, 0.0f, -1.0f, 0.0f);
};
return perspective_projection_matrix;
} }
inline Matrix4f translate(const Vector3f &v) inline Matrix4f translate(const Vector3f &v)