libgdx学习记录12——圆角矩形CircleRect

 1 package com.fxb.newtest;
 2 
 3 import com.badlogic.gdx.ApplicationAdapter;
 4 import com.badlogic.gdx.Gdx;
 5 import com.badlogic.gdx.graphics.Color;
 6 import com.badlogic.gdx.graphics.GL10;
 7 import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
 8 import com.badlogic.gdx.graphics.glutils.ShapeRenderer.ShapeType;
 9 
10 public class Lib011_CicleRect extends ApplicationAdapter{
11 
12     ShapeRenderer rend;
13     
14     @Override
15     public void create() {
16         // TODO Auto-generated method stub
17         rend = new ShapeRenderer();
18     }
19 
20     public void DrawCircleRect( float x, float y, float width, float height, float radius, ShapeRenderer rend, Color color ){
21         rend.setColor( color );
22         rend.begin(ShapeType.Line);
23         
24         //rend.rect( x, y, width, height );
25         rend.line( x+radius, y, x+width-radius, y );
26         rend.line( x+radius, y+height, x+width-radius, y+height );
27         rend.line( x, y+radius, x, y+height-radius );
28         rend.line( x+width, y+radius, x+width, y+height-radius );
29 /*        
30         rend.arc( x+width-radius, y+height-radius, radius, 0, 90 );
31         rend.arc( x+radius, y+height-radius, radius, 90, 90 );        
32         rend.arc( x+radius, y+radius, radius, 180, 90 );
33         rend.arc( x+width-radius, y+radius, radius, 270, 90 );
34         */
35     
36         int segments = (int)( 6*(float)Math.cbrt( radius ) );
37         
38         for( int i=0; i<segments; i++ ){
39             float x0 = x+width-radius;
40             float y0 = y+height-radius;
41             //float angle1 = (float)Math.PI*i*9f/180f;
42             //float angle2 = (float)Math.PI*(i+1)*9f/180f;
43             float angle1 = (float)Math.PI*i/(2*segments);
44             float angle2 = (float)Math.PI*(i+1)/(2*segments);
45             rend.line( x0+radius*(float)Math.cos(angle1), y0+radius*(float)Math.sin(angle1), x0+radius*(float)Math.cos(angle2), y0+radius*(float)Math.sin(angle2) );
46         }
47         
48         for( int i=0; i<segments; i++ ){
49             float x0 = x+radius;
50             float y0 = y+height-radius;
51             float angle1 = (float)Math.PI*(i+segments)/(2*segments);
52             float angle2 = (float)Math.PI*(i+segments+1)/(2*segments);
53             rend.line( x0+radius*(float)Math.cos(angle1), y0+radius*(float)Math.sin(angle1), x0+radius*(float)Math.cos(angle2), y0+radius*(float)Math.sin(angle2) );
54         }
55         
56         for( int i=0; i<segments; i++ ){
57             float x0 = x+radius;
58             float y0 = y+radius;
59             float angle1 = (float)Math.PI*(i+segments*2)/(2*segments);
60             float angle2 = (float)Math.PI*(i+segments*2+1)/(2*segments);
61             rend.line( x0+radius*(float)Math.cos(angle1), y0+radius*(float)Math.sin(angle1), x0+radius*(float)Math.cos(angle2), y0+radius*(float)Math.sin(angle2) );
62         }        
63         for( int i=0; i<segments; i++ ){
64             float x0 = x+width-radius;
65             float y0 = y+radius;
66             float angle1 = (float)Math.PI*(i+segments*3)/(2*segments);
67             float angle2 = (float)Math.PI*(i+segments*3+1)/(2*segments);
68             rend.line( x0+radius*(float)Math.cos(angle1), y0+radius*(float)Math.sin(angle1), x0+radius*(float)Math.cos(angle2), y0+radius*(float)Math.sin(angle2) );
69         }    
70         
71         rend.end();
72     }
73     
74     @Override
75     public void render() {
76         // TODO Auto-generated method stub    
77         Gdx.gl.glClearColor( 0.5f, 0.5f, 0.5f, 1 );
78         Gdx.gl.glClear( GL10.GL_COLOR_BUFFER_BIT );
79         
80         DrawCircleRect( 10, 10, 300, 200, 10, rend, Color.RED );
81         DrawCircleRect( 100, 60, 300, 200, 20, rend, Color.BLUE );
82         DrawCircleRect( 200, 110, 300, 200, 30, rend, Color.CYAN );
83         DrawCircleRect( 450, 160, 300, 200, 50, rend, Color.YELLOW );
84     }
85 
86     @Override
87     public void dispose() {
88         // TODO Auto-generated method stub
89         rend.dispose();
90         super.dispose();
91     }
92 
93 }