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win10-64下使用tdw64编译glew库实现着色shadding: alaclp 2015-12-4 01:05; 演示如果通过glew使用opengl的新特性 1 安装msys：下载地址 ;在windows下提供类似linux的命令环境. 2 下载glew代码、解压到d:\glew-xxx. 3 编译 1)启动msys. 2)进入d:\glew-xxx. 使用命令：cd /d/glew-xxx 3)编译：（要求已预先安装了mingw或tdw-mingw64） make 4)得到编译后的.a文件和.dll文件. 4 将include下GL拷贝到(tdw-mingw64)\include 将lib文件拷贝到(tdw-mingw64)\lib 5 建立工作文件夹，如：d:\workdir 6 拷贝4步中得到的dll到d:\workdir 7 下载freeglut for mingw（freeglut-MinGW-3.0.0-1.mp）并安装include和lib文件，拷贝其目录下的freeglut.dll到d:\workdir(注意不是freeglut32.dll). 8 编写测试程序，如vf_demo.cpp 9 编译c程序，命令： g++ -o vf_demo vf_demo.cpp -lglew32.dll -lopengl32 -lfreeglut -lglu32 10 运行程序： vf_demo 效果为：附上三个程序文件： vf_demo.cpp #include stdio.h #include stdlib.h #include string.h #include gl/glew.h #include gl/glut.h float window_width = 600; float window_height = 600; GLfloat xRot = 0.0f; GLfloat yRot = 0.0f; GLfloat xTrans = 0; GLfloat yTrans = 0; GLfloat zTrans = -32.0; int ox; int oy; int buttonState; GLfloat xRotLength = 0.0f; GLfloat yRotLength = 0.0f; GLfloat LightAmbient = { 1.0f, 1.0f, 1.0f, 1.0f }; GLfloat LightPosition = c; count++; } fclose(fp); fp = fopen(checkerboard.fs, r); count = 0; while((c = fgetc(fp)) != EOF) { fs = c; count++; } fclose(fp); printf(Shaders loaded...\n); v = glCreateShader(GL_VERTEX_SHADER); f = glCreateShader(GL_FRAGMENT_SHADER); const char *vv; const char *ff; vv = vs; ff = fs; glShaderSource(v, 1, vv, NULL); glShaderSource(f, 1, ff, NULL); int success; glCompileShader(v); glGetShaderiv(v, GL_COMPILE_STATUS, success); if(!success) { char info_log ; glGetShaderInfoLog(v, 5000, NULL, info_log); printf(Error in vertex shader compilation!\n); //printf(Info Log: %s\n, info_log); } glCompileShader(f); glGetShaderiv(f, GL_COMPILE_STATUS, success); if(!success) { char info_log ; glGetShaderInfoLog(f, 5000, NULL, info_log); printf(Error in fragment shader compilation!\n); //printf(Info Log: %s\n, info_log); } p = glCreateProgram(); glAttachShader(p, v); glAttachShader(p, f); glLinkProgram(p); glUseProgram(p); free(vs); free(fs); } void init() { glShadeModel(GL_SMOOTH); glEnable(GL_LIGHTING); glewInit(); //glew init set_shaders(); } void display_func() { glEnable(GL_DEPTH_TEST); glClearColor(0, 0, 0, 0.25); //0.75f, 0.75f, 0.75f, 0.25f); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glPushMatrix(); if(buttonState == 1) { xRot+= (xRotLength-xRot)*0.1f; yRot+= (yRotLength-yRot)*0.1f; } glTranslatef(xTrans, yTrans, zTrans); glRotatef(xRot, 1.0f, 0.0f, 0.0f); glRotatef(yRot, 0.0f, 1.0f, 0.0f); glLightfv(GL_LIGHT1, GL_AMBIENT, LightAmbient); glLightfv(GL_LIGHT1, GL_DIFFUSE, LightDiffuse); glLightfv(GL_LIGHT1, GL_POSITION,LightPosition); glEnable(GL_LIGHT1); draw_box(-10.0f, -10.0f, -10.0f, 20.0f, 20.0f, 20.0f); glColor3f(1.0f, 0.0f, 0.0f); GLint uniformLoc = glGetUniformLocation(p, lightPos); if (uniformLoc != -1) { glUniform3fv(uniformLoc, 1, LightPosition); } glutSolidSphere(8.0, 300, 300); glPopMatrix(); glutSwapBuffers(); } void idle_func() { glutPostRedisplay(); } void reshape_func(GLint width, GLint height) { glViewport(0, 0, width, height); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(45.0, (float)width/height, 0.001, 100.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); glTranslatef(0.0f, 0.0f, -3.0f); } void keyboard_func(unsigned char key, int x, int y) { switch(key) { case 'w': zTrans += 2.0f; break; case 's': zTrans -= 2.0f; break; case 'a': xTrans += 2.0f; break; case 'd': xTrans -= 2.0f; break; case 'q': yTrans += 2.0f; break; case 'e': yTrans -= 2.0f; break; default: break; } glutPostRedisplay(); } void specialkey_func(int key, int x, int y) { if(key == GLUT_KEY_UP) { zTrans += 2.0f; } if(key == GLUT_KEY_DOWN) { zTrans -= 2.0f; } if(key == GLUT_KEY_LEFT) { xTrans -= 2.0f; } if(key == GLUT_KEY_RIGHT) { xTrans += 2.0f; } glutPostRedisplay(); } void mouse_func(int button, int state, int x, int y) { if (state == GLUT_DOWN) { buttonState = 1; } else if (state == GLUT_UP) { buttonState = 0; } ox = x; oy = y; glutPostRedisplay(); } void motion_func(int x, int y) { float dx, dy; dx = (float)(x - ox); dy = (float)(y - oy); if (buttonState == 1) { xRotLength += dy / 5.0f; yRotLength += dx / 5.0f; } ox = x; oy = y; glutPostRedisplay(); } int main(int argc, char **argv) { glutInit(argc, argv); glutInitDisplayMode(GLUT_DEPTH | GLUT_RGBA | GLUT_DOUBLE); glutInitWindowPosition(0, 0); glutInitWindowSize(window_width, window_height); glutCreateWindow(Sphere demo); init(); glutDisplayFunc(display_func); glutReshapeFunc(reshape_func); glutSpecialFunc(specialkey_func); glutKeyboardFunc(keyboard_func); glutMouseFunc(mouse_func); glutMotionFunc(motion_func); glutIdleFunc(idle_func); glEnable(GL_DEPTH_TEST); glutMainLoop(); return 0; } 顶点着色文件checkerboard.vs(保存在workdir下) uniform vec3 lightPos; varying vec3 N, L, V; void main(void) { // normal MVP transform gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; // map object-space position onto unit sphere V = gl_Vertex.xyz; // eye-space normal N = gl_NormalMatrix * gl_Normal; // eye-space light vector vec4 Veye = gl_ModelViewMatrix * gl_Vertex; L = lightPos - Veye.xyz; } 面源着色文件checkerboard.fs // 3D solid checker grid varying vec3 V; // object-space position varying vec3 N; // eye-space normal varying vec3 L; // eye-space light vector const vec3 onColor = vec3(1.0, 1.0, 1.0); const vec3 offColor = vec3(0.0, 0.0, 0.0); const float ambientLighting = 0.2; const float specularExp = 60.0; const float specularIntensity = 0.75; const int numSquaresPerSide = 8; void main (void) { // Normalize vectors vec3 NN = normalize(N); vec3 NL = normalize(L); vec3 NV = normalize(V); vec3 NH = normalize(NL + vec3(0.0, 0.0, 1.0)); // Map -1,1 to 0,numSquaresPerSide vec3 onOrOff = ((NV + 1.0) * float(numSquaresPerSide)) / 2.0; // mod 2 = 1 onOrOff = step(1.0, mod(onOrOff, 2.0)); // 3-way xor onOrOff.x = step(0.5, mod(onOrOff.x + onOrOff.y + onOrOff.z, 2.0)); // checkerboard grid vec3 surfColor = mix(offColor, onColor, onOrOff.x); // calculate diffuse lighting + 20% ambient surfColor *= (ambientLighting + vec3(max(0.0, dot(NN, NL)))); // calculate specular lighting w/ 75% intensity surfColor += (specularIntensity * vec3(pow(max(0.0, dot(NN, NH)), specularExp))); gl_FragColor = vec4(surfColor, 1.0); } 编译后，程序正常工作。只是奇怪的是，freeglut.dll是64位的，glew32.dll是32位的，编译运行没有问题；但如果freeglut32.dll被使用的话，程序运行就出错。; 个人分类: 计算机图形学|3837 次阅读|0 个评论

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