openGL實現旋轉的茶壺
阿新 • • 發佈:2018-11-10
#include <stdlib.h> #include <GL/glut.h> #include<iostream> #pragma comment(lib, "glut32.lib") using namespace std; GLfloat roate = 0.0;// set rote of roate ying yu bu hao bu zhuang le 設定旋轉速率 GLfloat rote = 0.0;//shezhi旋轉角度 GLfloat anglex = 0.0;//X 軸旋轉 GLfloat angley = 0.0;//Y 軸旋轉 GLfloat anglez = 0.0;//Z 軸旋轉 GLint WinW = 400; GLint WinH = 400; GLfloat oldx;//當左鍵按下時記錄滑鼠座標 GLfloat oldy; void init(void) { glClearColor(1.0, 1.0, 1.0, 1.0); //背景黑色 } void display(void) { glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0, 0.0, 0.0); //畫筆紅色 glLoadIdentity(); //載入單位矩陣 gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0); glRotatef(rote, 0.0f, 1.0f, 0.0f); glRotatef(anglex, 1.0, 0.0, 0.0); glRotatef(angley, 0.0, 1.0, 0.0); glRotatef(anglez, 0.0, 0.0, 1.0); glutWireTeapot(2); rote += roate; //glRotatef(angle, 0.0, 1.0, 0.0); //angle += 1.0f; glutSwapBuffers(); } void reshape(int w, int h) { glViewport(0, 0, (GLsizei)w, (GLsizei)h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(60.0, (GLfloat)w / (GLfloat)h, 1.0, 20.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0); } void mouse(int button, int state, int x, int y) { if (button == GLUT_LEFT_BUTTON) { if (state == GLUT_DOWN) { roate = 0; rote = 0; oldx = x;//當左鍵按下時記錄滑鼠座標 oldy = y; cout << "left" << endl; } } if (button == GLUT_RIGHT_BUTTON) { if (state == GLUT_DOWN) { roate += 1.0f; cout << "right" << endl; } } } void motion(int x, int y) { GLint deltax = oldx - x; GLint deltay = oldy - y; anglex += 360 * (GLfloat)deltax / (GLfloat)WinW;//根據螢幕上滑鼠滑動的距離來設定旋轉的角度 angley += 360 * (GLfloat)deltay / (GLfloat)WinH; anglez += 360 * (GLfloat)deltay / (GLfloat)WinH; oldx = x;//記錄此時的滑鼠座標,更新滑鼠座標 oldy = y;//若是沒有這兩句語句,滑動是旋轉會變得不可控 glutPostRedisplay(); glutPostRedisplay(); } int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB); glutInitWindowSize(600, 600); glutInitWindowPosition(100, 100); glutCreateWindow(argv[0]); init(); glutDisplayFunc(display); glutReshapeFunc(reshape); glutMouseFunc(mouse); glutMotionFunc(motion); glutIdleFunc(display); glutMainLoop(); return 0; }
最後執行效果如下:
備註: 左鍵旋轉,右鍵旋轉後會自轉
FR:海濤高軟(Hunk Xu)
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