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add Matrix4f.cpp, moved a lot of codes to Matrix4f.cpp

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hyzboy
2020-11-19 18:25:20 +08:00
parent 16f8e89f5b
commit 64cc9345d0
3 changed files with 139 additions and 51 deletions
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78
inc/hgl/math/Matrix.h
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@@ -22,19 +22,21 @@ namespace hgl
return m.Inverted();
}
inline Matrix4f ortho( float left,
float right,
float bottom,
float top,
float znear,
float zfar )
{
return Matrix4f(
2.0f / (right - left), 0.0f, 0.0f, -(right + left) / (right - left),
0.0f, 2.0f / (bottom - top), 0.0f, -(bottom + top) / (bottom - top),
0.0f, 0.0f, 1.0f / (znear - zfar), znear / (znear - zfar),
0.0f, 0.0f, 0.0f, 1.0f);
}
/**
* 生成一个正角视图矩阵
* @param left 左
* @param right 右
* @param top 顶
* @param bottom 底
* @param znear 近平面z值
* @param zfar 远平台z值
*/
Matrix4f ortho( float left,
float right,
float bottom,
float top,
float znear,
float zfar );
/**
* 生成一个正角视图矩阵
@@ -43,28 +45,14 @@ namespace hgl
* @param znear 近平面z值
* @param zfar 远平台z值
*/
inline Matrix4f ortho(float width,float height,float znear,float zfar)
{
return Matrix4f(
2.0f / width, 0.0f, 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, 0.0f, 1.0f);
}
Matrix4f ortho(float width,float height,float znear,float zfar);
/**
* 生成一个正角视图矩阵
* @param width 宽
* @param height 高
*/
inline Matrix4f ortho(float width,float height)
{
return Matrix4f(
2.0f / width, 0.0f, 0.0f, -1,
0.0f, 2.0f / height, 0.0f, -1,
0.0f, 0.0f, -1.0f , 0.0f,
0.0f, 0.0f, 0.0f, 1.0f);
}
Matrix4f ortho(float width,float height);
/**
* 生成一个透视矩阵
@@ -73,28 +61,18 @@ namespace hgl
* @param znear 近截面
* @param zfar 远截面
*/
inline Matrix4f perspective(float field_of_view,
float aspect_ratio,
float znear,
float zfar)
{
const float f = 1.0f / tan( hgl_ang2rad( 0.5f * field_of_view ) );
Matrix4f perspective( float field_of_view,
float aspect_ratio,
float znear,
float zfar);
// float scaleX, shearXy, shearXz, x;
//float shearYx, scaleY, shearYz, y;
//float shearZx, shearZy, scaleZ, z;
//float shearWx, shearWy, shearWz, w;
return Matrix4f(
f / aspect_ratio, 0.0f, 0.0f, 0.0f,
0.0f, -f, 0.0f, 0.0f,
0.0f, 0.0f, zfar / (znear - zfar), (znear * zfar) / (znear - zfar),
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// 某些引擎这两项会乘0.5，那是因为他们是 -1 to 1 的Z值设定，而我们是0 to 1，所以这里不用乘
// 同理，camera的znear为接近0的正数，zfar为一个较大的正数，默认使用16/256
0.0f, 0.0f, -1.0f, 0.0f);
}
/**
* 产生一个lookat变换矩阵
* @param eye 眼睛位置
* @param target 目标位置
* @param up 向上向量
*/
Matrix4f lookat(const Vector4f &eye,const Vector4f &target,const Vector4f &up);
inline Matrix4f translate(const Vector3f &v)
{