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2003.04.23 10:52
[c] OpenGL 마우스 이벤트
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OpenGL 마우스 이벤트 처리 예제
#include<stdio.h> #include<stdlib.h> #include<GL/glut.h> short rightbuttonpressed = 0; double r=1.0, g=0.0, b=0.0; void display(void){ glClearColor(r, g, b, 1.0); glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0, 1.0, 1.0); glBegin(GL_LINES); glVertex2f(-1.0, 0.0); glVertex2f(0.0, 0.0); glEnd(); glFlush(); } void keyboard(unsigned char key, int x, int y){ switch(key){ case 'r' : r=1.0; g=b=0.0; glutPostRedisplay(); break; case 'g' : g=1.0; r=b=0.0; glutPostRedisplay(); break; case 'b' : b=1.0; r=g=0.0; glutPostRedisplay(); break; case 'q': exit(0); } } void mousepress(int button, int state, int x, int y){ if((button==GLUT_LEFT_BUTTON) && (state==GLUT_DOWN)) printf("*** The left mouse button was pressed at (%d, %d)n", x, y); else if((button==GLUT_RIGHT_BUTTON) && (state==GLUT_DOWN)) rightbuttonpressed = 1; else if((button==GLUT_RIGHT_BUTTON) && (state==GLUT_UP)) rightbuttonpressed = 0; } void mousemove(int x, int y){ if(rightbuttonpressed) printf("$$$ The right mouse button is now at (%d, %d).n",x,y); } void reshape(int width, int height){ printf("### The new windows size is %dx%d.n",width, height); } void RegisterCallback(void){ glutDisplayFunc(display); glutKeyboardFunc(keyboard); glutMouseFunc(mousepress); glutMotionFunc(mousemove); glutReshapeFunc(reshape); } void main(int argc, char **argv){ glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGBA); glutInitWindowSize(500,500); glutCreateWindow("My Second OpenGL Code"); RegisterCallback(); glutMainLoop(); }
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