太阳系：Solar System
以太阳（Sun）为中心，由内到外分别是：
水星（Mercury）
金星（Venus）
地球（Earth）
火星（Mars）
木星（Jupiter）
土星（Saturn）
天王星（Uranus）
海王星（Neptune）
冥王星（Pluto）
原来是太阳系九大行星，但是最后一个冥王星被除名，就变成八大行星了~
main.cpp
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//#include <windows.h>
#include <afx.h> #include <gl/gl.h> #include <gl/glu.h> #include <gl/glut.h> #include <math.h> #pragma comment(linker, "/subsystem:"windows" /entry:"mainCRTStartup"") #define glRGB(x, y, z) glColor3ub((GLubyte)x, (GLubyte)y, (GLubyte)z) #define SUN 1 // 太阳 #define MERCURY 2 // 水星 #define VENUS 3 // 金星 #define EARTH 4 // 地球 #define MARS 5 // 火星 #define JUPITER 6 // 木星 #define SATURN 7 // 土星 #define URANUS 8 // 天王星 #define NEPTUNE 9 // 海王星 #define PLUTO 10 // 冥王星 GLfloat fAspect; // Called to draw scene void RenderScene(GLenum mode) { //此处可加gluLookAt()函数 // Save the matrix state and do the rotations glMatrixMode(GL_MODELVIEW); glPushMatrix(); // Translate the whole scene out and into view glTranslatef(0.0f, 0.0f, -300.0f); // Initialize the names stack glInitNames(); glPushName(0); // Set material color, Yellow // Draw Sun glRGB(255, 255, 0); if (mode == GL_SELECT) glLoadName(SUN); glutSolidSphere(15.0f, 15, 15); // Draw Mercury glRGB(128, 0, 0); glPushMatrix(); glTranslatef(20.0f, 0.0f, 0.0f); if (mode == GL_SELECT) glLoadName(MERCURY); glutSolidSphere(2.0f, 15, 15); glPopMatrix(); // Draw Venus glPushMatrix(); glRGB(128, 128, 255); glTranslatef(30.0f, 0.0f, 0.0f); if (mode == GL_SELECT) glLoadName(VENUS); glutSolidSphere(4.0f, 15, 15); glPopMatrix(); // Draw the Earth glPushMatrix(); glRGB(0, 0, 255); glTranslatef(50.0f, 0.0f, 0.0f); if (mode == GL_SELECT) glLoadName(EARTH); glutSolidSphere(8.0f, 15, 15); glPopMatrix(); // Draw Mars glRGB(255, 0, 0); glPushMatrix(); glTranslatef(65.0f, 0.0f, 0.0f); if (mode == GL_SELECT) glLoadName(MARS); glutSolidSphere(4.0f, 15, 15); glPopMatrix(); // Draw Jupiter glRGB(238, 216, 174); glPushMatrix(); glTranslatef(80.0f, 0.0f, 0.0f); if (mode == GL_SELECT) glLoadName(JUPITER); glutSolidSphere(10.0f, 15, 15); glPopMatrix(); // Draw Saturn glRGB(255, 192, 203); glPushMatrix(); glTranslatef(105.0f, 0.0f, 0.0f); if (mode == GL_SELECT) glLoadName(SATURN); glutSolidSphere(10.0f, 15, 15); glPopMatrix(); // Draw Uranus glRGB(173, 216, 230); glPushMatrix(); glTranslatef(130.0f, 0.0f, 0.0f); if (mode == GL_SELECT) glLoadName(URANUS); glutSolidSphere(12.0f, 15, 15); glPopMatrix(); // Draw Neptune glRGB(30, 144, 255); glPushMatrix(); glTranslatef(160.0f, 0.0f, 0.0f); if (mode == GL_SELECT) glLoadName(NEPTUNE); glutSolidSphere(8.0f, 15, 15); glPopMatrix(); // Draw Pluto glRGB(238, 174, 238); glPushMatrix(); glTranslatef(190.0f, 0.0f, 0.0f); if (mode == GL_SELECT) glLoadName(PLUTO); glutSolidSphere(12.0f, 15, 15); glPopMatrix(); // Restore the matrix state glPopMatrix(); // Modelview matrix glutSwapBuffers(); // redraw... glutPostRedisplay(); } void Display(void) { // Clear the window with current clearing color glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); RenderScene(GL_RENDER); } // Present the information on which planet/sun was selected and displayed void ProcessPlanet(GLuint id) { switch(id) { case SUN: MessageBox(NULL, _T("You clicked on the Sun!"), _T("Info"), MB_OK | MB_ICONEXCLAMATION); break; case MERCURY: MessageBox(NULL, _T("You clicked on Mercury!"), _T("Info"), MB_OK | MB_ICONEXCLAMATION); break; case VENUS: MessageBox(NULL, _T("You clicked on Venus!"), _T("Info"), MB_OK | MB_ICONEXCLAMATION); break; case EARTH: MessageBox(NULL, _T("You clicked on Earth!"), _T("Info"), MB_OK | MB_ICONEXCLAMATION); break; case MARS: MessageBox(NULL, _T("You clicked on Mars!"), _T("Info"), MB_OK | MB_ICONEXCLAMATION); break; case JUPITER: MessageBox(NULL, _T("You clicked on Jupiter!"), _T("Info"), MB_OK | MB_ICONEXCLAMATION); break; case SATURN: MessageBox(NULL, _T("You clicked on Saturn!"), _T("Info"), MB_OK | MB_ICONEXCLAMATION); break; case URANUS: MessageBox(NULL, _T("You clicked on Uranus!"), _T("Info"), MB_OK | MB_ICONEXCLAMATION); break; case NEPTUNE: MessageBox(NULL, _T("You clicked on Neptune!"), _T("Info"), MB_OK | MB_ICONEXCLAMATION); break; case PLUTO: MessageBox(NULL, _T("You clicked on Pluto!"), _T("Info"), MB_OK | MB_ICONEXCLAMATION); break; default: MessageBox(NULL, _T("Nothing was clicked on!"), _T("Error"), MB_OK | MB_ICONEXCLAMATION); break; } } // Process the selection, which is triggered by a right mouse // click at (xPos, yPos). #define BUFFER_LENGTH 64 void ProcessSelection(int xPos, int yPos) { // Space for selection buffer GLuint selectBuff[BUFFER_LENGTH]; // Hit counter and viewport storeage GLint hits, viewport[4]; // Setup selection buffer glSelectBuffer(BUFFER_LENGTH, selectBuff); // Get the viewport glGetIntegerv(GL_VIEWPORT, viewport); // Switch to projection and save the matrix glMatrixMode(GL_PROJECTION); glPushMatrix(); // Change render mode glRenderMode(GL_SELECT); // Establish new clipping volume to be unit cube around // mouse cursor point (xPos, yPos) and extending two pixels // in the vertical and horzontal direction glLoadIdentity(); gluPickMatrix(xPos, viewport[3] - yPos, 2, 2, viewport); // Apply perspective matrix gluPerspective(45.0f, fAspect, 1.0, 425.0); // Draw the scene RenderScene(GL_SELECT); // Collect the hits hits = glRenderMode(GL_RENDER); // If a single hit occured, display the info. if(hits >= 1) { int choose = selectBuff[3]; int depth = selectBuff[1]; for(int i = 0 ; i < hits ; i++) { if(selectBuff[i * 4 + 1] < (GLuint)depth) //获取深度最小的物体(selectBuff是按照ID从小到大排列的) { choose = selectBuff[i * 4 + 3]; depth = selectBuff[i * 4 + 1]; } } ProcessPlanet(choose); } // Restore the projection matrix glMatrixMode(GL_PROJECTION); glPopMatrix(); // Go back to modelview for normal rendering glMatrixMode(GL_MODELVIEW); } void init(void) { glClearColor(0.0, 0.0, 0.0, 0.0); glEnable(GL_DEPTH_TEST); glShadeModel(GL_FLAT); glDepthRange(0.0, 1.0); /* The default z mapping */ } // Process the mouse click void MouseCallback(int button, int state, int x, int y) { if(button == GLUT_LEFT_BUTTON && state == GLUT_DOWN) ProcessSelection(x, y); } void ChangeSize(int w, int h) { // Prevent a divide by zero if(h == 0) h = 1; // Set Viewport to window dimensions glViewport(0, 0, w, h); // Calculate aspect ratio of the window fAspect = (GLfloat)w / (GLfloat)h; // Set the perspective coordinate system glMatrixMode(GL_PROJECTION); glLoadIdentity(); // Field of view of 45 degrees, near and far planes 1.0 and 425 gluPerspective(45.0f, fAspect, 1.0, 425.0); // Modelview matrix reset glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } int main(int argc, char *argv[]) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); glutInitWindowSize(600, 300); init(); glutCreateWindow("Pick a Planet"); glutReshapeFunc(ChangeSize); glutMouseFunc(MouseCallback); glutDisplayFunc(Display); glutMainLoop(); return 0; } |
