基于Opengl--bezier曲线（递归）

基于bezier递归算法求得曲线，不断增加参数t求出bezier曲线上的点，将各个点相连。

#include  #include       #include       #include  #include#include using namespace std;GLfloat ctrlPoints[4][3] ={{ -0.8f, 0.1f,0.0f}, {-0.4f, 0.6f,0.0f }, { 0.2f, 0.8f ,0.0f}, { 0.7f, 0.2f,0.0f }};void myDisplay(void) {glClear(GL_COLOR_BUFFER_BIT);glPointSize(3);glColor3f(1.0, 0.0, 0.0);for (int i = 0; i < 4; i++) {glBegin(GL_POINTS);glVertex2fv(&ctrlPoints[i][0]);glEnd();}glColor3f(0.0, 0.0, 1.0);glBegin(GL_LINE_STRIP);for (int i = 0; i < 4; i++) {glVertex2fv(&ctrlPoints[i][0]);}glEnd();int n = 4;//numberfloat xarray[4];float yarray[4];GLfloat ps[101][2];int u = 0;for (double t = 0.0; t<1; t += 0.01){for (int i = 1; i <n; ++i){for (int j = 0; j < n - i; ++j){if (i == 1) {xarray[j] = ctrlPoints[j][0] * (1 - t) + ctrlPoints[j + 1][0] * t;yarray[j] = ctrlPoints[j][1] * (1 - t) + ctrlPoints[j + 1][1] * t;continue;} xarray[j] = xarray[j] * (1 - t) + xarray[j + 1] * t;yarray[j] = yarray[j] * (1 - t) + yarray[j + 1] * t;}}ps[u][0] = xarray[0];ps[u][1] = yarray[0];u++;}glColor3f(1.0, 1.0, 0.0);glLineWidth(1);glBegin(GL_LINE_STRIP);for (int i = 0; i <100; i++){glVertex2fv(ps[i]);}glEnd();glFlush();}int main(int argc, char* argv[]){glutInit(&argc, argv);glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE);glutInitWindowPosition(100, 100);glutInitWindowSize(400, 400);glutCreateWindow("hi-你好");glutDisplayFunc(&myDisplay);glutMainLoop();return 0;}