曲线的绘制源码.docx

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2017-12-13 发布于河南
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曲线的绘制源码.docx

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曲线的绘制源码

// curve.cpp : Defines the entry point for the console application.//#include stdafx.h#include GL/glut.hvoid init();void keyboard(unsigned char key, int x, int y);void drawCurves(void);void curve_menu(int id);void display(void);void points_mouse(int button, int state, int x, int y);void reshape(int w, int h);void initLight(void);#define MAX_CPTS 25 /* fixed maximum number of control points */#define Bezier 1#define Bspline 2#define Bez3d 3GLfloat cpts[MAX_CPTS][3];int ncpts = 0;static int width = 500, height = 500; /* window width and height */GLint type=0;GLfloat newcpts[MAX_CPTS][3];static GLfloat xx=0.0;static GLfloat yy=0.0;static GLfloat zz=1.0;static GLfloat theta[]={0.0,0.0,0.0};static GLint axis=2;//添加变量double object_x = 0,object_y = 0,object_z = 0; //3D坐标GLdouble winx, winy, winz;//2D坐标int m_drawPos = -1;bool isPro = false;bool isRun = false;/* Bez3ds control points*/GLfloat points[4][4][3]={{{-0.5,-0.5,0.6},{-0.2,-0.5,0.6},{0.3,-0.5,-0.4},{0.5,-0.5,0.6}},{{-0.5,-0.3,0.4},{-0.3,0.5,0.6},{0.3,0.3,0.4},{0.5,-0.3,-0.5}},{{-0.5,0.3,0.6},{-0.3,0.3,0.5},{0.3,0.3,0.8},{0.5,-0.5,0.5}},{{-0.5,0.5,-0.6},{-0.3,0.5,-0.6},{0.3,0.3,0.4},{0.5,0.5,-0.5}},};void vmult(float m[4][4], float v[4][3], float r[4][3]){int i,j,k;for(i=0;i4;i++)for(j=0;j3;j++){r[i][j]=0;for(k=0;k4;k++) r[i][j]+=m[i][k]*v[k][j];}}static float mbspline[4][4]={{1.0/6.0, 4.0/6.0, 1.0/6.0, 0.0}, {0.0, 4.0/6.0, 2.0/6.0, 0.0},{0.0, 2.0/6.0, 4.0/6.0,0.0},{0.0, 1.0/6.0, 4.0/6.0, 1.0/6.0},};static float midentity[4][4]={{1.0, 0.0, 0.0, 0.0}, {0.0, 1.0, 0.0, 0.0},{0.0, 0.0, 1.0, 0.0},{0.0, 0.0, 0.0, 1.0},};void computeMatrix(float m[][4]){for(int i = 0;i4;i++)for(int j = 0; j4;j++){m[i][j] = mbspline[i][j];}}void init(){glClearColor(1.0, 1.0, 1.0, 1.0); glColor3f(0.0, 0.0, 0.0); glPointSize(5.0); glEnable(GL_MAP1_VERTEX_3); glutAddMenuEntry(Bezier,1); glutAddMenuEntry(Bspline,2); glutAddMenuEntry(Bez3d,3); glutAddMenuEntry(clear ,4); glutAddMenuEntry(quit,5);glutAtta