OpenGL ES画球.doc

#include PVRShell.h #include PVRShellAPI.h #include #define PI_ 3.14159265358979323846 class CLesson2 : public PVRShell float DegToRad(float deg); public: virtual bool InitApplication(); virtual bool InitView(); virtual bool ReleaseView(); virtual bool QuitApplication(); virtual bool RenderScene(); protected: private: ; bool CLesson2:InitApplication() return true; bool CLesson2:QuitApplication() return true; /这个函数抠至 gult|es void PlotSpherePoints(GLfloat radius, GLint stacks, GLint slices, GLfloat* v, GLfloat* n, GLfloat* t) GLint i, j; GLfloat slicestep, stackstep; stackstep = (GLfloat)PI_) / stacks; slicestep = 2.0f * (GLfloat)PI_) / slices; for (i = 0; i stacks; +i) GLfloat a = i * stackstep; GLfloat b = a + stackstep; GLfloat s0 = (GLfloat)sin(a); GLfloat s1 = (GLfloat)sin(b); GLfloat c0 = (GLfloat)cos(a); GLfloat c1 = (GLfloat)cos(b); for (j = 0; j = slices; +j) GLfloat c = j * slicestep; GLfloat x = (GLfloat)cos(c); GLfloat y = (GLfloat)sin(c); *n = x * s0; *v = *n * radius; n+; v+; *n = y * s0; *v = *n * radius; n+; v+; *n = c0; *v = *n * radius; n+; v+; *n = x * s1; *v = *n * radius; n+; v+; *n = y * s1; *v = *n * radius; n+; v+; *n = c1; *v = *n * radius; n+; v+; *t = 0.0f;t+; *t = 0.0f;t+; *t = 1.0f;t+; *t = 0.0f;t+; *t = 0.5f;t+; *t = -1.0f;t+; int iS = 720; GLint slices = 100;/圆的轴数，轴越多圆弧越弯曲 GLint stacks = 500;/饱和度，值越大，越鼓 GLfloat radius = 0.4f;/半径 static GLfloat* v, *n, *t; GLuint m_ui32Texture; bool CLesson2:InitView() /球顶点 v = (GLfloat*)malloc(stacks*(slices+1)*2*3*sizeof *v); /球法线 n = (GLfloat*)malloc(stacks*(slices+1)*2*3*sizeof *n); /球纹理 t = (GLfloat*)malloc(stacks*(slices+1)*2*3*sizeof *n); PlotSpherePoints(radius, stacks, slices, v, n,t); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); GLfloat position = 0.5, 0.5, -1.0, 0.0 ; glEnable(GL_DEPTH_TEST); glLightfv(GL_LIGHT0, GL_POSITION, position); /* GLfloat mat3 = 0.1745, 0.01175, 0.01175; glMaterialfv (GL_FRONT_AND_BACK, GL_AMBIENT, mat);/环境光 mat0 = 0.04136; mat1 = 0.04136; mat2 = 0.61424; glMaterialfv (GL_FRONT_AND_BACK, GL_DIFFUSE, mat);/散射光 mat0 = 0.727811; mat1 = 0.626959; mat2 = 0.626959; glMaterialfv (GL_FRONT_AND_BACK, GL_SPECULAR, mat);/聚光 glMaterialf (GL_FRONT_AND_BACK, GL_SHININESS, 0.6*128.0); */ /增加纹理 glEnable(GL_TEXTURE_2D); glGenTextures(1, &m_ui32Texture); int g_i32TexSize = 128; GLuint* pTexData = new GLuintg_i32TexSize*g_i32TexSize; for(int i = 0; i g_i32TexSize; +i) for(int j = 0; j g_i32TexSize; +j) / Fills the data with a fancy pattern GLuint col = (255L24) + (255L-j*2)16) + (255L-i)8) + (255L-i*2); if( (i*j)/8) % 2 ) col = 0xffff00ff; pTexDataj*g_i32TexSize+i = col; glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, g_i32TexSize, g_i32TexSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, pTexData); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR ); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR ); return true; bool CLesson2:ReleaseView() return true; PVRShell * NewDemo(void) return new CLesson2(); bool CLesson2:RenderScene() GLint i, triangles; glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glVertexPointer(3, GL_FLOAT, 0, v); glNormalPointer(GL_FLOAT, 0, n); glTexCoordPointer(2,GL_FLOAT,0,t); glEnableClientState (GL_VERTEX_ARRAY); glEnableClientState (GL_NORMAL_ARRAY); glEnableClientState (GL_TEXTURE_COORD_ARRAY); triangles = (slices + 1) * 2; for(i = 0; i stacks; i+) glDrawArrays(GL_TRIANGLE_STRIP, i * triangles, triangles); glDisableClientState(GL_VERTEX_ARRA