啄木鸟图形库的顶点封装类测试代码，分别使用VBO和非VBO的形式实现ArrayOfStructs以及StructsOfArrays这两种顶点数据结构。CVertexIndexDrawArrayGLES2类将提供顶点的相关操作。通过配置VEXIDXDRAWITEM的值配置顶点缓冲，这个以后可以通过模型文件进行集中初始化。
效果图：
shader的代码，使用GLSL ES 1.0搞的 （OPENGLES 2.0的程序不看shader还真的不知道具体怎么画的）
static const Char strVertexShader[] ="attribute vec4 aPosition;\n""attribute vec4 aColor;\n""uniform mat4 uFixedViewMatrix;\n""varying vec4 vColor;\n""void main() {\n""gl_Position = uFixedViewMatrix * aPosition;\n""vColor = aColor;""}\n";static const Char strFragmentShader[] ="precision mediump float;\n""varying vec4 vColor;\n""void main() {\n""gl_FragColor = vColor;\n""}\n";测试程序主窗体代码
class CTestForm : public CPeckerActivityForm{
private:IPeckerCGDriver* m_pCGDriver;CGPUProgramGLES2 m_ShaderProgram;CVertexIndexDrawArrayGLES2 m_ArrayOfStructsWithOutVBODrawItems;CVertexIndexDrawArrayGLES2 m_StructsOfArraysWithOutVBODrawItems;CVertexIndexDrawArrayGLES2 m_ArrayOfStructsWithVBODrawItems;CVertexIndexDrawArrayGLES2 m_StructsOfArraysWithVBODrawItems;CMatrix4 m_MatView;CMatrix4 m_MatWorld;CMatrix4 m_MatProj;CMatrix4 m_MatScale;CMatrix4 m_MatOgMvp;UInt m_MvpMatHandle;typedef struct stVecCoord{Vector4f pos;Vector3f color;} VECCOR;
public:CTestForm(){m_pCGDriver = CPeckerCGDrivers::GetCGDriver();}virtual ~CTestForm(){;}virtual HResult InitDisplay(int w, int h){if (null == m_pCGDriver){return P_ERR;}static const VECCOR vecClr[] ={{{ -0.5f, 0.0f, 0.0f, 1.0f },{ 0.0f, 0.0f, 0.0f } },{{ -0.5f, 1.0f, 0.0f, 1.0f },{ 0.0f, 1.0f, 0.0f } },{{ 0.5f, 0.0f, 0.0f, 1.0f },{ 1.0f, 0.0f, 0.0f } },{{ 0.5f, 1.0f, 0.0f, 1.0f },{ 1.0f, 1.0f, 1.0f } } };static const GLfloat fPos[] ={ -0.5f, 0.0f, 0.0f, 1.0f, -0.5f, 1.0f, 0.0f, 1.0f, 0.5f, 0.0f, 0.0f,1.0f, 0.5f, 1.0f, 0.0f, 1.0f };static const GLfloat fColor[] ={ 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,1.0f, 1.0f };m_ArrayOfStructsWithOutVBODrawItems.ClearDrawItem();VEXIDXDRAWITEM drawItem;// only vertex;//ArrayOfStructsdrawItem.m_BuffID = 0;drawItem.m_BuffTargetType = PG_ARRAY_BUFFER;drawItem.m_BuffUseType = PG_STATIC_DRAW;drawItem.m_DrawData = vecClr;drawItem.m_DrawBufLen = sizeof(vecClr);drawItem.m_FVFFormat = 0;drawItem.m_bNormalized = false;drawItem.m_nDataFormat = PG_FLOAT;drawItem.m_nAttrDataCount = 4;drawItem.m_nShaderAttrID = 0;drawItem.m_nOffset = 0;drawItem.m_Stride = sizeof(VECCOR);m_ArrayOfStructsWithOutVBODrawItems.AddDrawItem(drawItem);drawItem.m_BuffID = 0;drawItem.m_BuffTargetType = PG_ARRAY_BUFFER;drawItem.m_BuffUseType = PG_STATIC_DRAW;drawItem.m_DrawData = vecClr;drawItem.m_DrawBufLen = sizeof(vecClr);drawItem.m_FVFFormat = 0;drawItem.m_bNormalized = false;drawItem.m_nDataFormat = PG_FLOAT;drawItem.m_nAttrDataCount = 3;drawItem.m_nShaderAttrID = 1;drawItem.m_nOffset = sizeof(Vector4f);drawItem.m_Stride = sizeof(VECCOR);m_ArrayOfStructsWithOutVBODrawItems.AddDrawItem(drawItem);m_ArrayOfStructsWithOutVBODrawItems.InitDrawArray(NORMAL_VERTEX_DRAWITEM_MODE);//StructsOfArraysm_StructsOfArraysWithOutVBODrawItems.ClearDrawItem();drawItem.m_BuffID = 0;drawItem.m_BuffTargetType = PG_ARRAY_BUFFER;drawItem.m_BuffUseType = PG_STATIC_DRAW;drawItem.m_DrawData = fPos;drawItem.m_DrawBufLen = sizeof(fPos);drawItem.m_FVFFormat = 0;drawItem.m_bNormalized = false;drawItem.m_nDataFormat = PG_FLOAT;drawItem.m_nAttrDataCount = 4;drawItem.m_nShaderAttrID = 0;drawItem.m_nOffset = 0;drawItem.m_Stride = sizeof(Vector4f);m_StructsOfArraysWithOutVBODrawItems.AddDrawItem(drawItem);drawItem.m_BuffID = 0;drawItem.m_BuffTargetType = PG_ARRAY_BUFFER;drawItem.m_BuffUseType = PG_STATIC_DRAW;drawItem.m_DrawData = fColor;drawItem.m_DrawBufLen = sizeof(fColor);drawItem.m_FVFFormat = 0;drawItem.m_bNormalized = false;drawItem.m_nDataFormat = PG_FLOAT;drawItem.m_nAttrDataCount = 3;drawItem.m_nShaderAttrID = 1;drawItem.m_nOffset = 0;drawItem.m_Stride = sizeof(Vector3f);m_StructsOfArraysWithOutVBODrawItems.AddDrawItem(drawItem);m_StructsOfArraysWithOutVBODrawItems.InitDrawArray(NORMAL_VERTEX_DRAWITEM_MODE);//VBO ArrayOfStructsm_ArrayOfStructsWithVBODrawItems.ClearDrawItem();glGenBuffers(1, &(drawItem.m_BuffID));drawItem.m_BuffTargetType = PG_ARRAY_BUFFER;drawItem.m_BuffUseType = PG_STATIC_DRAW;drawItem.m_DrawData = vecClr;drawItem.m_DrawBufLen = sizeof(vecClr);drawItem.m_FVFFormat = 0;drawItem.m_bNormalized = false;drawItem.m_nDataFormat = PG_FLOAT;drawItem.m_nAttrDataCount = 4;drawItem.m_nShaderAttrID = 0;drawItem.m_nOffset = 0;drawItem.m_Stride = sizeof(VECCOR);m_ArrayOfStructsWithVBODrawItems.AddDrawItem(drawItem);glGenBuffers(1, &(drawItem.m_BuffID));drawItem.m_BuffTargetType = PG_ARRAY_BUFFER;drawItem.m_BuffUseType = PG_STATIC_DRAW;drawItem.m_DrawData = vecClr;drawItem.m_DrawBufLen = sizeof(vecClr);drawItem.m_FVFFormat = 0;drawItem.m_bNormalized = false;drawItem.m_nDataFormat = PG_FLOAT;drawItem.m_nAttrDataCount = 3;drawItem.m_nShaderAttrID = 1;drawItem.m_nOffset = sizeof(Vector4f);drawItem.m_Stride = sizeof(VECCOR);m_ArrayOfStructsWithVBODrawItems.AddDrawItem(drawItem);m_ArrayOfStructsWithVBODrawItems.InitDrawArray(VERTEX_VBO_DRAWITEM_MODE);//VBO StructsOfArraysm_StructsOfArraysWithVBODrawItems.ClearDrawItem();glGenBuffers(1, &(drawItem.m_BuffID));drawItem.m_BuffTargetType = PG_ARRAY_BUFFER;drawItem.m_BuffUseType = PG_STATIC_DRAW;drawItem.m_DrawData = fPos;drawItem.m_DrawBufLen = sizeof(fPos);drawItem.m_FVFFormat = 0;drawItem.m_bNormalized = false;drawItem.m_nDataFormat = PG_FLOAT;drawItem.m_nAttrDataCount = 4;drawItem.m_nShaderAttrID = 0;drawItem.m_nOffset = 0;drawItem.m_Stride = sizeof(Vector4f);m_StructsOfArraysWithVBODrawItems.AddDrawItem(drawItem);glGenBuffers(1, &(drawItem.m_BuffID));drawItem.m_BuffTargetType = PG_ARRAY_BUFFER;drawItem.m_BuffUseType = PG_STATIC_DRAW;drawItem.m_DrawData = fColor;drawItem.m_DrawBufLen = sizeof(fColor);drawItem.m_FVFFormat = 0;drawItem.m_bNormalized = false;drawItem.m_nDataFormat = PG_FLOAT;drawItem.m_nAttrDataCount = 3;drawItem.m_nShaderAttrID = 1;drawItem.m_nOffset = 0;drawItem.m_Stride = sizeof(Vector3f);m_StructsOfArraysWithVBODrawItems.AddDrawItem(drawItem);m_StructsOfArraysWithVBODrawItems.InitDrawArray(VERTEX_VBO_DRAWITEM_MODE);m_ShaderProgram.CreateShaderSysDefaultProgram(MVP_POS_COLOR_TYPE); //(POS_TYPE);ConstStringChars strUniformIName ={ "uFixedViewMatrix", strlen("uFixedViewMatrix") };m_MvpMatHandle = m_ShaderProgram.GetUniformID(strUniformIName);m_MatView = CMatrix4::LookAtRH(CVector3(0.0f, 0.0f, 5.0f),CVector3(0.0f, 0.0f, 0.0f), CVector3(0.0f, 1.0f, 0.0f));m_MatProj = CMatrix4::PerspectiveFov(PECKER_PI / 4.0f,(float) h / (float) w, 0.01f, 1.0f, true);m_MatWorld = CMatrix4::IdentityMatrix4(); //CMatrix4::RotationZ(-PECKER_PI);m_MatScale = CMatrix4::Scale(0.5f, 0.5f, 1.0f);m_MatOgMvp = m_MatProj * m_MatView * m_MatScale * m_MatWorld;m_pCGDriver->SetContextViewport(0, 0, w, h);return 0;}virtual HResult RenderFrame(struct stOsContextEngine* pContextEngine){if (null == m_pCGDriver){return P_ERR;}UInt iShaderAttr = glGetAttribLocation(m_ShaderProgram.GetProgramID(),"aPosition");m_pCGDriver->ClearColor(0.5f, 0.0f, 1.0f, 1.0f);m_pCGDriver->Clear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);HResult hSelectProRes = m_pCGDriver->SelectGPUProgram(&m_ShaderProgram);if (P_OK == hSelectProRes && P_OK == m_pCGDriver->Begin()){static char logInfo[256];static Float fAngle = 0.0f;CMatrix4 mvp = m_MatOgMvp * CMatrix4::Translation(1.5f, -1.5f, 0.0f);//* CMatrix4::RotationZ(fAngle);fAngle += 0.1f;if (fAngle > 6.29)fAngle = 0.0f;// ArrayOfStructs Without VBOm_ShaderProgram.SetUniformMatrixArray(m_MvpMatHandle, 1,(Matrix4*) mvp.GetData());m_ArrayOfStructsWithOutVBODrawItems.PreArrayDraw();m_ArrayOfStructsWithOutVBODrawItems.DrawVertexArray(PG_TRIANGLE_STRIP, 0, 4);m_ArrayOfStructsWithOutVBODrawItems.FinArrayDraw();// StructsOfArrays Without VBOmvp = m_MatOgMvp * CMatrix4::Translation(1.5f, 1.5f, 0.0f);//* CMatrix4::RotationZ(-fAngle);m_ShaderProgram.SetUniformMatrixArray(m_MvpMatHandle, 1,(Matrix4*) mvp.GetData());m_StructsOfArraysWithOutVBODrawItems.PreArrayDraw();m_StructsOfArraysWithOutVBODrawItems.DrawVertexArray(PG_TRIANGLE_STRIP, 0, 4);m_StructsOfArraysWithOutVBODrawItems.FinArrayDraw();// ArrayOfStructs With VBOmvp = m_MatOgMvp * CMatrix4::Translation(-1.5f, 1.5f, 0.0f);// * CMatrix4::RotationZ(fAngle);m_ShaderProgram.SetUniformMatrixArray(m_MvpMatHandle, 1,(Matrix4*) mvp.GetData());m_ArrayOfStructsWithVBODrawItems.PreArrayDraw();m_ArrayOfStructsWithVBODrawItems.DrawVertexArray(PG_TRIANGLE_STRIP, 0, 4);m_ArrayOfStructsWithVBODrawItems.FinArrayDraw();// StructsOfArrays With VBOmvp = m_MatOgMvp * CMatrix4::Translation(-1.5f, -1.5f, 0.0f);//* CMatrix4::RotationZ(-fAngle);m_ShaderProgram.SetUniformMatrixArray(m_MvpMatHandle, 1,(Matrix4*) mvp.GetData());m_StructsOfArraysWithVBODrawItems.PreArrayDraw();m_StructsOfArraysWithVBODrawItems.DrawVertexArray(PG_TRIANGLE_STRIP, 0, 4);m_StructsOfArraysWithVBODrawItems.FinArrayDraw();m_pCGDriver->End();}else{static char logInfo[256];sprintf(logInfo, "SelectGPUProgram RES = %X", hSelectProRes);CPeckerLogger::GetSignleton()->LogOut(LOGINFO_ERROR, "RenderFrame",logInfo);}return 0;}//virtual HResult TermDisplay(struct stOsContextEngine* pContextEngine) = 0;virtual HResult SaveState(struct stOsContextEngine* pContextEngine){return 0;}virtual HResult LoadState(struct stOsContextEngine* pContextEngine){return 0;}virtual SInt OnInputEvent(Handle hEventHandle){return 0;}virtual void OnWndCmdProc(struct stOsContextEngine* pContextEngine,Long nCmdCode, Long wPrams){}
};
