java贝塞尔曲线代码,贝塞尔曲线和贝塞尔函数

怎么求 Java 贝塞尔曲线两点之间的角度

public void test() {

CvPoint controlPoint[] = new CvPoint[4];

controlPoint[0] = new CvPoint(50, 60); //起点

controlPoint[1] = new CvPoint(130, 200); //控制点

controlPoint[2] = new CvPoint(300, 360); //控制点

controlPoint[3] = new CvPoint(400, 600); //终点

int n = controlPoint.length - 1; //

int i, r;

float u;

bezierPoint.clear();

// u的步长决定了曲线点的精度

for (u = 0; u = 1; u += 0.01) {

CvPoint p[] = new CvPoint[n + 1];

for (i = 0; i = n; i++) {

p[i] = new CvPoint(controlPoint[i].x, controlPoint[i].y);

}

for (r = 1; r = n; r++) {

for (i = 0; i = n - r; i++) {

p[i].x = (1 - u) * p[i].x + u * p[i + 1].x;

p[i].y = (1 - u) * p[i].y + u * p[i + 1].y;

}

}

bezierPoint.add(p[0]);

}

for (CvPoint point : bezierPoint) {

System.out.println(point.x + "," + point.y);

}

}

相关问答

Q1: 用c#写贝塞尔曲线代码

namespace Line

{

public partial class Form1 : Form

{

int l1, l2, l3, l4;

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

}

private void Form1_MouseDown(object sender, MouseEventArgs e)

{

l1 = e.X; l2 = e.Y;

}

private void Form1_MouseUp(object sender, MouseEventArgs e)

{

l3 = e.X; l4 = e.Y;

Paint()

}

private void Paint(object sender, PaintEventArgs e)

{

Graphics graLine = e.Graphics;

Pen myPen = new Pen(Color.Blue);

graLine.DrawLine(myPen, l1, l2, l3, l4);

}

}

}

参考资料

graLine.DrawLine(myPen, l1, l2, l3, l4);

更改.DrawLine为曲线即可

Q2: java 三次贝塞尔曲线 怎么确定控制点

只是第二点和第三点的坐标而已，肯定有算法。具体看你要实现什么业务。

Q3: 【贝塞尔曲线：如何让一个正在按照贝塞尔曲线运动的精灵减速或加速

CCSprite *sprite3=[CCSprite spriteWithFile:@"giantAnt.png"]; sprite3.position=ccp(100,100); [self addChild:sprite3 z:999 tag:9987]; id move = [CCBezierTo actionWithDuration:5.0f bezier:config]; id speed =[CCSpeed actionWithAction:move speed:1.0f]; [speed setTag:222]; [sprite3 runAction:speed]; 如何要减速的话就执行这行代码[(CCSpeed*)[[self getChildByTag:9987] getActionByTag:222] setSpeed:0.5f];加速[(CCSpeed*)[[self getChildByTag:9987] getActionByTag:222] setSpeed:1.5f];