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Camera.cpp LookAt函数改为使用模板

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This commit is contained in:
hyzboy 2019-06-24 21:00:55 +08:00
parent e989a62d9c
commit 1a3f74b9da
1 changed files with 9 additions and 7 deletions
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16
src/SceneGraph/Camera.cpp
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@ -3,22 +3,23 @@ namespace hgl
{ {
namespace graph namespace graph
{ {
inline Matrix4f LookAt(const Vector4f &eye,const Vector4f &target,const Vector4f &up) template<typename V>
inline Matrix4f LookAt(const V &eye,const V &target,const V &up)
{ {
Vector4f forward=target-eye; V forward=target-eye;
normalize(forward); normalize(forward);
Vector4f side=cross(forward,up); V side=cross(forward,up);
normalize(side); normalize(side);
Vector4f nup=cross(side,forward); V nup=cross(side,forward);
Matrix4f result(side.x, side.y, side.z, 0.0f, Matrix4f result( side.x, side.y, side.z, 0.0f,
nup.x, nup.y, nup.z, 0.0f, nup.x, nup.y, nup.z, 0.0f,
-forward.x, -forward.y, -forward.z, 0.0f, -forward.x, -forward.y, -forward.z, 0.0f,
-dot(side,eye), -dot(nup,eye), dot(forward,eye), 1.0f); -dot(side,eye), -dot(nup,eye), dot(forward,eye), 1.0f);
return result*translate(-eye.xyz()); return result*translate(-eye.xyz());
} }
@ -33,6 +34,7 @@ namespace hgl
//matrix.inverse_projection=matrix.projection.Inverted(); //matrix.inverse_projection=matrix.projection.Inverted();
matrix.modelview=hgl::graph::LookAt(eye,center,up_vector); matrix.modelview=hgl::graph::LookAt(eye,center,up_vector);
//matrix.modelview=Matrix4f::LookAt(eye.xyz(),center.xyz(),forward_vector.xyz(),up_vector.xyz(),up_vector.xyz());
matrix.mvp=matrix.projection*matrix.modelview; matrix.mvp=matrix.projection*matrix.modelview;