opengl鼠标操作例子

/* 磁铁组绘制 */ #include <windows.h> // Header File For Windows #include <gl\gl.h> // Header File For The OpenGL32 Library #include <gl\glu.h> // Header File For The GLu32 Library #include <gl\glut.h> #include <stdio.h> #include <math.h> #include "ArcBall.h" // 定义滚轮操作 #define GLUT_WHEEL_UP 3 #define GLUT_WHEEL_DOWN 4 // Rotation amounts // 定义滚轮操作 #define GLUT_WHEEL_UP 3 #define GLUT_WHEEL_DOWN 4 double magnet_para[100][8]; int magnet_name[100]; double vBx[201]; double vBy[201]; double vBz[201]; double line[201]; int mouse_x_left = 0; int mouse_x_right = 0; int mouse_y_up = 0; int mouse_y_down = 0; double smax=8; double shift_x = 0; double shift_y = 0; double shift_move_x = 0; double shift_move_y = 0; double scale = 1; bool left_tag = false; bool right_tag = false; int mouse_x = 0; int mouse_y = 0; double nstart_x; double nstart_y; double nstart_z; double nstop_x; double nstop_y; double nstop_z; int item_num = 1; float dx, dy, dz; GLdouble posx, posy, posz; GLfloat vertices[] = { -1.0,-1.0,-1.0,1.0,-1.0,-1.0, 1.0,1.0,-1.0, -1.0,1.0,-1.0, -1.0,-1.0,1.0, 1.0,-1.0,1.0, 1.0,1.0,1.0, -1.0,1.0,1.0 }; GLfloat colors[] = { 0.0,0.0,0.0,1.0,0.0,0.0, 1.0,1.0,0.0, 0.0,1.0,0.0, 0.0,0.0,1.0, 1.0,0.0,1.0, 1.0,1.0,1.0, 0.0,1.0,1.0 }; GLubyte cubeIndices[] = { 0,3,2,1,2,3,7,6,0,4,7,3,1,2,6,5,4,5,6,7,0,1,5,4 }; // mouse control Matrix4fT Transform = { 1.0f, 0.0f, 0.0f, 0.0f, // NEW: Final Transform 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f }; Matrix3fT LastRot = { 1.0f, 0.0f, 0.0f, // NEW: Last Rotation 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f }; Matrix3fT ThisRot = { 1.0f, 0.0f, 0.0f, // NEW: This Rotation 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f }; ArcBallT ArcBall(640.0f, 480.0f); // NEW: ArcBall Instance Point2fT MousePt; // NEW: Current Mouse Point bool isClicked = false; // NEW: Clicking The Mouse? bool isDragging = false; // NEW: Dragging The Mouse? GLfloat nRange; GLfloat size_max = 10.0f; void ChangeSize(GLsizei w, GLsizei h); void DrawAxis(GLfloat axis_length); void DrawLine(GLfloat start_x, GLfloat start_y, GLfloat start_z, GLfloat stop_x, GLfloat stop_y, GLfloat stop_z); void DrawBox(double *cx, double *cy, double *cz, double *a, double *b, double *c, int *mag, int total); void mouse(int btn, int state, int x, int y); void mouseMotion(int x, int y); void SetupRC(); void screen2GLPoint(float px, float py); void display(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); glPushMatrix(); // NEW: Prepare Dynamic Transform glRotatef(300.0f, 1.0f, 0.0f, 0.0f); //初始模型角度 glRotatef(15.0f, 0.0f, 0.0f, 1.0f); //初始模型角度 //缩放 glScalef(scale, scale, scale); //矩阵实现旋转 glMultMatrixf(Transform.M); // NEW: Apply Dynamic Transform //矩阵实现平移 extern GLdouble posx, posy, posz; void screen2GLPoint(float px, float py); screen2GLPoint(shift_x + shift_move_x, shift_y + shift_move_y); dx = posx *0.1*smax; dy = posy *0.1*smax; dz = posz *0.1*smax; Matrix4fT move_matrix = { 1.0f, 0.0f, 0.0f, 0.0f, // NEW: Final Transform 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, dx, dy, dz, 1.0f }; glMultMatrixf(move_matrix.M); // 画坐标系 DrawAxis(1.2*size_max); // 画磁铁 double cx[4] = { -3,-3,3,3 }; double cy[4] = { -4,4,4,-4 }; double cz[4] = { 0,0,0,0 }; double a[4] = { 2,2,2,2 }; double b[4] = { 3,3,3,3 }; double c[4] = { 2,2,2,2 }; int mag[4] = { 31,31,32,32 }; int total = 4; DrawBox(cx, cy, cz, a, b, c, mag, total); // 画作图线 DrawLine(-5.0f, 0.0f, 1.0f, 5.0f, 0.0f, 1.0f); glPopMatrix(); glutSwapBuffers(); } //======================================== void RenderScene() { //清空颜色缓冲区，填充的颜色由 glClearColor( 0, 0.0, 0.0, 1 ); 指定为黑色 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glPushMatrix(); //glRotatef(300.0f, 1.0f, 0.0f, 0.0f); //glRotatef(15.0f, 0.0f, 0.0f, 1.0f); //glRotatef((anger_x + anger_move_x) * 90, 1.0f, 0.0f, 0.0f); //glRotatef((anger_y + anger_move_y) * 90, 0.0f, 1.0f, 0.0f); //glTranslatef((shift_x + shift_move_x) * 0.02, 0.0f, 0.0f); //glTranslatef(0.0f, (shift_y + shift_move_y) * 0.02, 0.0f); //glScalef(scale, scale, scale); // 画坐标系 DrawAxis(1.2*size_max); // 画磁铁 double cx[4] = {-3,-3,3,3}; double cy[4] = {-4,4,4,-4}; double cz[4] = {0,0,0,0}; double a[4] = {2,2,2,2}; double b[4] = {3,3,3,3}; double c[4] = {2,2,2,2}; int mag[4] = {31,31,32,32}; int total = 4; DrawBox(cx,cy,cz,a,b,c,mag,total); // 画作图线 DrawLine(-5.0f, 0.0f, 1.0f, 5.0f, 0.0f, 1.0f); //glEnable(GL_POINT_SMOOTH); glEnable(GL_LINE_SMOOTH); glEnable(GL_POLYGON_SMOOTH); //glHint(GL_POINT_SMOOTH_HINT, GL_NICEST); glHint(GL_LINE_SMOOTH_HINT, GL_NICEST); glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST); glMultMatrixf(Transform.M); // NEW: Apply Dynamic Transform glPopMatrix(); glutSwapBuffers(); } int main(int argc, char* argv[]) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); glutInitWindowSize(800, 600); glutInitWindowPosition(100, 100); glutCreateWindow("模型（鼠标旋转、缩放、移动）"); glutDisplayFunc(display); glutIdleFunc(display); //glutIdleFunc 表示在CPU空闲的时间调用某一函数 glutReshapeFunc(ChangeSize); glutMouseFunc(mouse); glutMotionFunc(mouseMotion); SetupRC(); glutMainLoop(); return 1; } void SetupRC() { glClearColor(0.7, 0.7, 0.9, 1); glShadeModel(GL_SMOOTH); glEnable(GL_DEPTH_TEST);//被遮住的部分不绘制 //glEnable(GL_POINT_SMOOTH); glEnable(GL_LINE_SMOOTH); glEnable(GL_POLYGON_SMOOTH); //glHint(GL_POINT_SMOOTH_HINT, GL_NICEST); glHint(GL_LINE_SMOOTH_HINT, GL_NICEST); glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST); } void ChangeSize(GLsizei w, GLsizei h) { //作图范围 //GLfloat nRange = 12.0f; // Prevent a divide by zero if (h == 0) h = 1; // Set Viewport to window dimensions glViewport(0, 0, w, h); // Reset projection matrix stack glMatrixMode(GL_PROJECTION); glLoadIdentity(); // Establish clipping volume (left, right, bottom, top, near, far) int nscale = 2; if (w <= h) glOrtho(-nscale * smax, nscale * smax, -nscale * smax*h / w, nscale * smax*h / w, -2 * nscale * smax, 6 * nscale * smax); else glOrtho(-nscale * smax*w / h, nscale * smax*w / h, -nscale * smax, nscale * smax, -2 * nscale * smax, 6 * nscale * smax); // Reset Model view matrix stack glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } void DrawAxis(GLfloat axis_length) { //绘制x、y、z坐标轴 glColor3f(1.0f, 0.0f, 0.0f);//指定线的颜色,红色 glBegin(GL_LINES); { // x-axis glVertex3f(0.0f, 0.0f, 0.0f); glVertex3f(axis_length, 0.0f, 0.0f); // x-axis arrow glVertex3f(axis_length, 0.0f, 0.0f); glVertex3f(0.95*axis_length, 0.03*axis_length, 0.0f); glVertex3f(axis_length, 0.0f, 0.0f); glVertex3f(0.95*axis_length, -0.03*axis_length, 0.0f); glVertex3f(axis_length, 0.0f, 0.0f); glVertex3f(0.95*axis_length, 0.0f, 0.03*axis_length); glVertex3f(axis_length, 0.0f, 0.0f); glVertex3f(0.95*axis_length, 0.0f, -0.03*axis_length); } glEnd(); glColor3f(0.0f, 1.0f, 0.0f);//指定线的颜色,绿色 glBegin(GL_LINES); { // y-axis glVertex3f(0.0f, 0.0f, 0.0f); glVertex3f(0.0f, axis_length, 0.0f); // y-axis arrow glVertex3f(0.0f, axis_length, 0.0f); glVertex3f(0.03*axis_length, 0.95*axis_lengt