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我不确定如何旋转我的对象。目前我有一个四边形,我希望能够以45度角度观看它,我已经建立了我的模型视图投影矩阵。我知道我应该在着色器中而不是在实际的代码中做这件事,稍后我会改变它,但这里有一些代码。不确定如何在opengl中旋转对象2
bool bRotate = PVRShellGet(prefIsRotated) && PVRShellGet(prefFullScreen);
p_Matrix = PVRTMat4::PerspectiveFovRH(PVRT_PI/6, (float) PVRShellGet(prefWidth)/(float) PVRShellGet(prefHeight), 4.0f, 1000.0f, PVRTMat4::OGL, bRotate);
PVRTVec3 view_From(2, 2, 0);
v_Matrix = PVRTMat4::LookAtRH(view_From, view_At, view_Up) * PVRTMat4::RotationX(45);
cam_Pos = view_From;
PVRTMat4 modelView, world, mMVP;
world = PVRTMat4::Identity();
modelView = v_Matrix * world;
mMVP = p_Matrix * modelView;
if(PVRShellGet(prefIsRotated) && PVRShellGet(prefFullScreen)) // If the screen is rotated
mMVP = PVRTMat4::RotationZ(-1.57f);
/*
Pass this matrix to the shader.
The .m field of a PVRTMat4 contains the array of float used to
communicate with OpenGL ES.
*/
glUniformMatrix4fv(m_ShaderProgram.auiLoc[eMVPMatrix], 1, GL_FALSE, mMVP.ptr());
我试过旋转mMVP矩阵,但它没有效果。并尝试旋转modelview和v_matrix(视图矩阵)。我使用了由SDK给出的名为PVRTMat4 :: RotationX(45)的函数;