public void OnRenderFrame(OpenTK.FrameEventArgs e)
{
//ushort[] indices = { 0, 1, 2, 0, 2, 3 };
float[] black = new float[] { 0, 0, 0, 1 };
GL.ClearBuffer(ClearBuffer.Color, 0, black);
float[] ones = new float[] { 1.0f };
GL.ClearBuffer(ClearBuffer.Depth, 0, ones);
GL.UseProgram(m_program);
const int POS_INDEX = 0;
const int NORMAL_INDEX = 1;
const int POS_SIZE = 3;
const int NORMAL_SIZE = 3;
GL.VertexAttribPointer(POS_INDEX, POS_SIZE, All.Float, false, (POS_SIZE + NORMAL_SIZE) * sizeof(float), m_ptr);
GL.VertexAttribPointer(NORMAL_INDEX, NORMAL_SIZE, All.Float, false, (POS_SIZE + NORMAL_SIZE) * sizeof(float), m_ptr + sizeof(float) * POS_SIZE);
GL.EnableVertexAttribArray(POS_INDEX);
GL.EnableVertexAttribArray(NORMAL_INDEX);
float[] vEyeLight = { -100.0f, 100.0f, 100.0f };
float[] vAmbientColor = { 0.1f, 0.1f, 0.1f, 1.0f };
float[] vDiffuseColor = { 0.0f, 0.0f, 1.0f, 1.0f };
float[] vSpecularColor = { 1.0f, 1.0f, 1.0f, 1.0f };
GL.Uniform4(m_locAmbient, 1, vAmbientColor);
GL.Uniform4(m_locDiffuse, 1, vDiffuseColor);
GL.Uniform4(m_locSpecular, 1, vSpecularColor);
GL.Uniform3(m_locLight, 1, vEyeLight);
m_accTime += e.Time;
Matrix4x4 modelUnity = Matrix4x4.TRS(Vector3.one, Quaternion.identity, Vector3.one);
Transform cameraTrans = new Transform();
cameraTrans.position = new Vector3(10, 10, 10);
cameraTrans.forward = Vector3.zero - cameraTrans.position;
Matrix4x4 cameraLocalToWorld = cameraTrans.localToWorldMatrix;
Matrix4x4 viewUnity = OpenGLHelper.UnityWorldToCameraMatrix(cameraLocalToWorld);
Matrix4x4 projectionUnity = Matrix4x4.Perspective(60, m_width / (float)m_height, 0.1f, 100f);
Matrix4x4 mvUnity = viewUnity * modelUnity;
Matrix4x4 mvpUnity = projectionUnity * viewUnity * modelUnity;
Matrix4x4 mvUnity2 = viewUnity.transpose * modelUnity.transpose;
Matrix4x4 mvpUnity2 = projectionUnity.transpose * viewUnity.transpose * modelUnity.transpose;
//Vector3 testPoint = Vector3.one;
Vector4 testPoint = mvpUnity.MultiplyPoint(Vector3.one);
//Vector4 testPoint = mvpUnity * Vector3.one;
//Matrix4x4 cameraLocalToWorldUnity = Matrix4x4.TRS(new Vector3(10, 10, 10), Quaternion.Euler(45, 0, 0), Vector3.one);
//Matrix4x4 view = UnityWorldToCameraMatrix(cameraLocalToWorld);
//Matrix4x4 projection = Matrix4x4.Perspective(60, m_width / (float)m_height, 0.1f, 100f);
//Matrix4x4 mv = view * model;
//Matrix4x4 mvp = projection * view * model;
OpenTK.Matrix4 model = OpenGLHelper.GLSRT(OpenTK.Vector3.One, OpenTK.Quaternion.Identity, OpenTK.Vector3.One);
//OpenTK.Matrix4 cameraLocaltoWorld = TRS(new OpenTK.Vector3(0, 0, 50), new OpenTK.Quaternion(0, 0, 0), OpenTK.Vector3.One);
//OpenTK.Matrix4 view = worldToCameraMatrix(cameraLocaltoWorld);
OpenTK.Matrix4 view = OpenGLHelper.GLLookAt(new OpenTK.Vector3(10, 10, 10), OpenTK.Vector3.Zero, new OpenTK.Vector3(0, 1, 0));
OpenTK.Matrix4 projection = OpenGLHelper.GLPerspective(60, m_width / (float)m_height, 0.1f, 100f);
// 坑死。。opengl变换从左往右乘
OpenTK.Matrix4 mv = model * view;
OpenTK.Matrix4 mv2 = OpenGLHelper.Multiply(model, view);
OpenTK.Matrix4 mv3 = OpenGLHelper.GLVMathMultiply(view, model);
OpenTK.Matrix4 mvp = model * view * projection;
OpenTK.Matrix4 mvp2 = OpenGLHelper.Multiply(mv2, projection);
OpenTK.Matrix4 mvp3 = OpenGLHelper.GLVMathMultiply(projection, mv3);
OpenTK.Vector4 testPoint2 = OpenGLHelper.LeftMultiply(OpenTK.Vector3.One, mvp);
testPoint2 /= testPoint2.W;
OpenTK.Vector4 testPoint3 = OpenGLHelper.RightMultiply(mvp, OpenTK.Vector3.One);
//OpenTK.Vector4 testPoint4 = LeftMultiply(OpenTK.Vector3.One, mvp);
//UnityEngine.Debug.Log(mvp.ToString());
//OpenTK.Matrix4 mvp2 = ConverToFloat2(mvp);
//OpenTK.Matrix4 mv2 = ConverToFloat2(mv);
OpenGLHelper.ClearGLError();
//GL.UniformMatrix4(m_locMVP, false, ref mvp);
GL.UniformMatrix4(m_locMVP, 1, false, OpenGLHelper.ConverToFloat(mvp));
OpenGLHelper.CheckGLError();
GL.UniformMatrix4(m_locMV, false, ref mv);
//GL.UniformMatrix4(m_locMVP, 1, false, ConverToFloat(mvp));
//GL.UniformMatrix4(m_locMV, 1, false, ConverToFloat(mv));
GL.DrawElements(PrimitiveType.Triangles, m_meshData.m_index.Length, DrawElementsType.UnsignedShort, m_meshData.m_index);
}