OpenGL消隐和光照

// glutEx1.cpp : 定义控制台应用程序的入口点。 // #include <stdlib.h> #include "glut.h" float fTranslate; float fRotate; float fScale = 1.0f; // set inital scale value to 1.0f bool bPersp = false; bool bAnim = false; bool bWire = false; bool lightcolor = false; float lx=5,ly=5,lz=5; //光源初始位置 bool bjuguang = false; float spl=45; //裁剪角度参数 float spx=0,spy=0; //光源朝向参数 int wHeight = 0; int wWidth = 0; void Draw_Leg(); void Draw_Triangle() // This function draws a triangle with RGB colors { glPushMatrix(); float mat_diffuse[] = {0.85f, 0.65f, 0.2f, 1.0f}; float mat_specular[] = {0.6f, 0.6f, 0.6f, 1.0f}; glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse); glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); glMateriali(GL_FRONT_AND_BACK,GL_SHININESS,50); glTranslatef(0, 0, 4+1); glRotatef(90, 1, 0, 0); glutSolidTeapot(1); glPopMatrix(); glPushMatrix(); float specular1[] = {0 ,0, 0, 1.0f}; float color1[]={1,0,0,1}; glMaterialfv(GL_FRONT, GL_SPECULAR, specular1); glMaterialfv(GL_FRONT, GL_DIFFUSE, color1); glTranslatef(0, 0, 3.5); glScalef(5, 4, 1); glColor3f(1.0,0.0,0.0); glutSolidCube(1.0); glPopMatrix(); glPushMatrix(); float color2[]={0,1,0,1}; glMaterialfv(GL_FRONT, GL_DIFFUSE, color2); glTranslatef(1.5, 1, 1.5); glColor3f(0.0,1.0,0.0); Draw_Leg(); glPopMatrix(); glPushMatrix(); float color3[]={1,1,0,1}; glMaterialfv(GL_FRONT, GL_DIFFUSE, color3); glTranslatef(-1.5, 1, 1.5); glColor3f(1.0,1.0,0.0); Draw_Leg(); glPopMatrix(); glPushMatrix(); float color4[]={0,1,1,1}; glMaterialfv(GL_FRONT, GL_DIFFUSE, color4); glTranslatef(1.5, -1, 1.5); glColor3f(0.0,1.0,1.0); Draw_Leg(); glPopMatrix(); glPushMatrix(); float color5[]={0,0,1,1}; glMaterialfv(GL_FRONT, GL_DIFFUSE, color5); glTranslatef(-1.5, -1, 1.5); glColor3f(0.0,0.0,1.0); Draw_Leg(); glPopMatrix(); glDisable(GL_COLOR_MATERIAL); } void Draw_Leg() { glScalef(1, 1, 3); glutSolidCube(1.0); } void updateView(int width, int height) { glViewport(0,0,width,height); // Reset The Current Viewport glMatrixMode(GL_PROJECTION); // Select The Projection Matrix glLoadIdentity(); // Reset The Projection Matrix float whRatio = (GLfloat)width/(GLfloat)height; if (bPersp) { gluPerspective(45.0f, whRatio,0.1f,100.0f); //glFrustum(-3, 3, -3, 3, 3,100); } else { glOrtho(-3 ,3, -3, 3,-100,100); } glMatrixMode(GL_MODELVIEW); // Select The Modelview Matrix } void reshape(int width, int height) { if (height==0) // Prevent A Divide By Zero By { height=1; // Making Height Equal One } wHeight = height; wWidth = width; updateView(wHeight, wWidth); } void idle() { glutPostRedisplay(); } float eye[] = {0, 0, 8}; float center[] = {0, 0, 0}; void key(unsigned char k, int x, int y) { switch(k) { case 27: case 'q': {exit(0); break; } case 'p': {bPersp = !bPersp; break; } case ' ': {bAnim = !bAnim; break;} case 'o': {bWire = !bWire; break;} case 'd': { eye[0] -= 0.2f; center[0] -= 0.2f; break; } case 'a': { eye[0] += 0.2f; center[0] += 0.2f; break; } case 'w': { eye[1] -= 0.2f; center[1] -= 0.2f; break; } case 's': { eye[1] += 0.2f; center[1] += 0.2f; break; } case 'z': { eye[2] -= 0.2f; center[2] -= 0.2f; break; } case 'c': { eye[2] += 0.2f; center[2] += 0.2f; break; } case 'D': { lx++; break; } case 'A': { lx--; break; } case 'W': { ly++; break; } case 'S': { ly--; break; } case 'Z': { lz++; break; } case 'C': { lz--; break; } case 'X': { lightcolor = !lightcolor; break; } case 'T':{ bjuguang=!bjuguang; break; } //聚光灯开关 case 'J' :{ spx+=0.5 ; break; } //光源方向参数 case 'L' :{ spx-=0.5; break; } case 'I' :{ spy+=0.5; break; } case 'K' :{ spy-=0.5; break; } case 'U' :{ spl+=0.5; break; } //裁剪角度参数 case 'O' :{ spl-=0.5; break; } } updateView(wHeight, wWidth); } void redraw() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); // Reset The Current Modelview Matrix gluLookAt(eye[0], eye[1], eye[2], center[0], center[1], center[2], 0, 1, 0); // 场景（0，0，0）的视点中心 (0,5,50)，Y轴向上 if (bWire) { glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); } else { glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); } glEnable(GL_DEPTH_TEST); glEnable(GL_LIGHTING); GLfloat white[] = { 1.0, 1.0, 1.0, 1.0 }; GLfloat blue[] = { 0.0, 0.0, 1.0, 1.0 }; GLfloat light_pos[] = {lx,ly,lz,1}; // GLfloat light_pos[] = {5,5,5,1}; glLightfv(GL_LIGHT0, GL_POSITION, light_pos); //光源位置函数 if(lightcolor) glLightfv(GL_LIGHT0, GL_AMBIENT, blue); if(!lightcolor) glLightfv(GL_LIGHT0, GL_AMBIENT, white); //光源颜色 glEnable(GL_LIGHT0); float jcolor[]={10,9,8,1}; //聚光灯颜色 // GLfloat light_ambient[]= { 0.2, 0.2, 0.2, 1.0 }; // glLightfv(GL_LIGHT1, GL_AMBIENT,light_ambient); //设置环境光成分 glLightfv(GL_LIGHT1, GL_SPECULAR,jcolor); //设置镜面光成分 glLightfv(GL_LIGHT1, GL_DIFFUSE,jcolor); //设置漫射光成分 GLfloat position[]={0,10,0,1}; GLfloat lightDir[]={spx,-1,spy}; //聚光灯光源方向数组 //glLightf(GL_LIGHT1, GL_SPOT_CUTOFF,spotangle); //裁减角度 glLightfv(GL_LIGHT1, GL_POSITION,position); glLightf(GL_LIGHT1, GL_SPOT_CUTOFF,spl); //裁减角度 glLightfv(GL_LIGHT1, GL_SPOT_DIRECTION, lightDir); //光源方向 glLightf(GL_LIGHT1,GL_SPOT_EXPONENT,2.0); //聚集度 if(bjuguang) glEnable(GL_LIGHT1); else glDisable(GL_LIGHT1); // glTranslatef(0.0f, 0.0f,-6.0f); // Place the triangle at Center glRotatef(fRotate, 0, 1.0f, 0); // Rotate around Y axis glRotatef(-90, 1, 0, 0); glScalef(0.2, 0.2, 0.2); Draw_Triangle(); // Draw triangle if (bAnim) fRotate += 0.5f; glutSwapBuffers(); } int main (int argc, char *argv[]) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGBA | GLUT_DEPTH | GLUT_DOUBLE); glutInitWindowSize(480,480); int windowHandle = glutCreateWindow("Simple GLUT App"); glutDisplayFunc(redraw); glutReshapeFunc(reshape); glutKeyboardFunc(key); glutIdleFunc(idle); glutMainLoop(); return 0; }