利用ShapeRenderer可进行矩形进度条的绘制，多变形的填充等操作。
这是根据角度获取矩形坐标的函数。
1 public Vector2 GetPoint( float x, float y, float w, float h, float angle ){
2 Vector2 point = new Vector2();
3 while( angle >= 360 ){
4 angle -= 360;
5 }
6 while( angle < 0 ){
7 angle += 360;
8 }
9
10 System.out.println( GetAtan( h/w ) );
11
12 if( angle>=0 && angle<GetAtan( h/w ) || angle>=360-GetAtan( h/w ) && angle<360 ){
13 point.x = x+w;
14 point.y = y+w*Change( angle );
15 }
16 else if( angle>=GetAtan( h/w ) && angle<180-GetAtan( h/w ) ){
17 point.x = x+h*Change( 90-angle );
18 point.y = y+h;
19 }
20 else if( angle>=180-GetAtan( h/w ) && angle<180+GetAtan( h/w ) ){
21 point.x = x-w;
22 point.y = y-w*Change( angle );
23 }
24 else if( angle>=180+GetAtan( h/w ) && angle<360-GetAtan( h/w ) ){
25 point.x = x-h*Change( 90-angle );
26 point.y = y-h;
27 }
28
29 return point;
30 }
画部分矩形
1 public void FillPartRect( float x, float y, float w, float h, float start, float angle, ShapeRenderer rend, Color color )
2 {
3 rend.begin( ShapeType.Line );
4 rend.setColor( color );
5 rend.rect( x-w, y-h, 2*w, 2*h );
6 rend.end();
7
8 rend.begin( ShapeType.Filled );
9
10 for( int i=0; i<angle-1; i++ ){
11 Vector2 point1 = GetPoint( x, y, w, h, start+i );
12 Vector2 point2 = GetPoint( x, y, w, h, start+i+1 );
13 rend.triangle( x, y, point1.x, point1.y, point2.x, point2.y );
14 }
15 rend.end();
16 }
全部代码如下：
1 package com.fxb.newtest;
2
3 import sun.security.provider.certpath.Vertex;
4
5 import com.badlogic.gdx.ApplicationAdapter;
6 import com.badlogic.gdx.Gdx;
7 import com.badlogic.gdx.graphics.Color;
8 import com.badlogic.gdx.graphics.GL10;
9 import com.badlogic.gdx.graphics.Pixmap;
10 import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
11 import com.badlogic.gdx.graphics.glutils.ShapeRenderer.ShapeType;
12 import com.badlogic.gdx.math.Rectangle;
13 import com.badlogic.gdx.math.Vector2;
14
15 public class Lib012_CdDraw extends ApplicationAdapter{
16
17 ShapeRenderer rend;
18
19 float[] vertexs;
20
21 Pixmap pixmap;
22 float angle = 0;
23
24 @Override
25 public void create() {
26 // TODO Auto-generated method stub
27 rend = new ShapeRenderer();
28
29 vertexs = new float[]{ 100, 100, 250, 100, 200, 200, 100, 250 };
30
31 }
32
33
34 public void FillPolygon( float[] vertexs, ShapeRenderer rend, Color color ){
35 if( vertexs.length%2 != 0 ){
36 return;
37 }
38 rend.begin( ShapeType.Filled );
39 rend.setColor( color );
40 for( int i=2; i<=vertexs.length-4; i+=2 ){
41 rend.triangle( vertexs[0], vertexs[1], vertexs[i], vertexs[i+1], vertexs[i+2], vertexs[i+3] );
42 }
43 rend.end();
44 }
45
46 public float Change( float angle0 ){
47 return (float)Math.tan( angle0*(float)Math.PI/180 );
48 }
49
50 public void FillRect( float x, float y, float w, float h, float start, float angle, ShapeRenderer rend, Color color ){
51
52 rend.begin( ShapeType.Line );
53 rend.setColor( color );
54 rend.rect( x-w, y-h, 2*w, 2*h );
55 rend.end();
56
57 rend.begin( ShapeType.Filled );
58 rend.setColor( color );
59 //angle = angle*(float)Math.PI/180;
60
61 if( angle <= 45 ){
62 rend.triangle( x, y, x+w, y, x+w, y+w*(float)Math.tan( angle*(float)Math.PI/180 ) );
63 }
64 else if( angle <= 135 ){
65 rend.triangle( x, y, x+w, y, x+w, y+w );
66 rend.triangle( x, y, x+w, y+h, x+h*(float)Math.tan( (90-angle)*(float)Math.PI/180 ), y+h );
67 }
68 else if( angle <= 135+90 ){
69 rend.triangle( x, y, x+w, y, x+w, y+w );
70 rend.triangle( x, y, x+w, y+h, x-w, y+h );
71 rend.triangle( x, y, x-w, y+h, x-w, y-w*Change( angle ) );
72 }
73 else if( angle <= 135+180 ){
74 rend.triangle( x, y, x+w, y, x+w, y+w );
75 rend.triangle( x, y, x+w, y+h, x-w, y+h );
76 rend.triangle( x, y, x-w, y+h, x-w, y-h );
77 rend.triangle( x, y, x-w, y-h, x-h*Change( 270-angle ), y-h );
78 }
79 else if( angle <= 360 ){
80 rend.triangle( x, y, x+w, y, x+w, y+w );
81 rend.triangle( x, y, x+w, y+h, x-w, y+h );
82 rend.triangle( x, y, x-w, y+h, x-w, y-h );
83 rend.triangle( x, y, x-w, y-h, x+w, y-h );
84 rend.triangle( x, y, x+w, y-h, x+w, y+w*Change(angle) );
85 }
86
87 rend.end();
88 }
89
90 public float GetAtan( float angle ){
91 return (float)( 180*Math.atan( angle )/Math.PI );
92 }
93
94 public Vector2 GetPoint( float x, float y, float w, float h, float angle ){
95 Vector2 point = new Vector2();
96 while( angle >= 360 ){
97 angle -= 360;
98 }
99 while( angle < 0 ){
100 angle += 360;
101 }
102
103 System.out.println( GetAtan( h/w ) );
104
105 if( angle>=0 && angle<GetAtan( h/w ) || angle>=360-GetAtan( h/w ) && angle<360 ){
106 point.x = x+w;
107 point.y = y+w*Change( angle );
108 }
109 else if( angle>=GetAtan( h/w ) && angle<180-GetAtan( h/w ) ){
110 point.x = x+h*Change( 90-angle );
111 point.y = y+h;
112 }
113 else if( angle>=180-GetAtan( h/w ) && angle<180+GetAtan( h/w ) ){
114 point.x = x-w;
115 point.y = y-w*Change( angle );
116 }
117 else if( angle>=180+GetAtan( h/w ) && angle<360-GetAtan( h/w ) ){
118 point.x = x-h*Change( 90-angle );
119 point.y = y-h;
120 }
121
122 return point;
123 }
124
125
126 public void FillRect1( float x, float y, float w, float h, float start, float angle, ShapeRenderer rend, Color color ){
127
128 rend.begin( ShapeType.Line );
129 rend.setColor( color );
130 rend.rect( x-w, y-h, 2*w, 2*h );
131 rend.end();
132
133 rend.begin( ShapeType.Filled );
134 rend.setColor( color );
135 //angle = angle*(float)Math.PI/180;
136
137 if( angle <= 45 ){
138 rend.triangle( x, y, x, y+h, x+h*Change( angle ), y+h );
139 }
140 else if( angle <= 135 ){
141 rend.triangle( x, y, x, y+h, x+w, y+w );
142 rend.triangle( x, y, x+w, y+h, x+w, y+w*Change( 90-angle ) );
143 }
144 else if( angle <= 135+90 ){
145 rend.triangle( x, y, x, y+h, x+w, y+w );
146 rend.triangle( x, y, x+w, y+h, x+w, y-h );
147 rend.triangle( x, y, x+w, y-h, x-h*Change( angle ), y-h );
148 }
149 else if( angle <= 135+180 ){
150 rend.triangle( x, y, x, y+h, x+w, y+w );
151 rend.triangle( x, y, x+w, y+h, x+w, y-h );
152 rend.triangle( x, y, x+w, y-h, x-w, y-h );
153 rend.triangle( x, y, x-w, y-h, x-w, y-w*Change( 270-angle ) );
154 }
155 else if( angle <= 360 ){
156 rend.triangle( x, y, x, y+h, x+w, y+w );
157 rend.triangle( x, y, x+w, y+h, x+w, y-h );
158 rend.triangle( x, y, x+w, y-h, x-w, y-h );
159 rend.triangle( x, y, x-w, y-h, x-w, y+h );160 rend.triangle( x, y, x-w, y+h, x+h*Change( angle ), y+h );
161 }
162
163 rend.end();
164 }
165
166
167 public void FillRect2( float x, float y, float w, float h, float start, float angle, ShapeRenderer rend, Color color ){
168
169 rend.begin( ShapeType.Line );
170 rend.setColor( color );
171 rend.rect( x-w, y-h, 2*w, 2*h );
172 rend.end();
173
174 rend.begin( ShapeType.Filled );
175 rend.setColor( color );
176 //angle = angle*(float)Math.PI/180;
177 rend.rect( x-w, y-h, 2*w, 2*h );
178
179 //rend.setColor( color.mul( 0.5f ) );
180
181 if( angle <= 45 ){
182 rend.triangle( x, y, x, y+h, x+h*Change( angle ), y+h );
183 }
184 else if( angle <= 135 ){
185 rend.triangle( x, y, x, y+h, x+w, y+w );
186 rend.triangle( x, y, x+w, y+h, x+w, y+w*Change( 90-angle ) );
187 }
188 else if( angle <= 135+90 ){
189 rend.triangle( x, y, x, y+h, x+w, y+w );
190 rend.triangle( x, y, x+w, y+h, x+w, y-h );
191 rend.triangle( x, y, x+w, y-h, x-h*Change( angle ), y-h );
192 }
193 else if( angle <= 135+180 ){
194 rend.triangle( x, y, x, y+h, x+w, y+w );
195 rend.triangle( x, y, x+w, y+h, x+w, y-h );
196 rend.triangle( x, y, x+w, y-h, x-w, y-h );
197 rend.triangle( x, y, x-w, y-h, x-w, y-w*Change( 270-angle ) );
198 }
199 else if( angle <= 360 ){
200 rend.triangle( x, y, x, y+h, x+w, y+w );
201 rend.triangle( x, y, x+w, y+h, x+w, y-h );
202 rend.triangle( x, y, x+w, y-h, x-w, y-h );
203 rend.triangle( x, y, x-w, y-h, x-w, y+h );
204 rend.triangle( x, y, x-w, y+h, x+h*Change( angle ), y+h );
205 }
206
207 rend.end();
208 }
209
210
211 public void FillPartRect( float x, float y, float w, float h, float start, float angle, ShapeRenderer rend, Color color )
212 {
213 rend.begin( ShapeType.Line );
214 rend.setColor( color );
215 rend.rect( x-w, y-h, 2*w, 2*h );
216 rend.end();
217
218 rend.begin( ShapeType.Filled );
219
220 for( int i=0; i<angle-1; i++ ){
221 Vector2 point1 = GetPoint( x, y, w, h, start+i );
222 Vector2 point2 = GetPoint( x, y, w, h, start+i+1 );
223 rend.triangle( x, y, point1.x, point1.y, point2.x, point2.y );
224 }
225 rend.end();
226 }
227
228 public void FillCircle( ){
229
230 }
231
232
233
234 @Override
235 public void render() {
236 // TODO Auto-generated method stub
237 Gdx.gl.glClearColor( 0, 1, 1, 1 );
238 Gdx.gl.glClear( GL10.GL_COLOR_BUFFER_BIT );
239
240 Gdx.gl.glEnable( GL10.GL_BLEND );
241 Gdx.gl.glBlendFunc( GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA );
242
243 /* rend.begin( ShapeType.Filled );
244 rend.setColor( Color.BLUE );
245 //rend.polyline( vertexs );
246 //rend.line( 100, 100, 200, 200 );
247 //rend.triangle( 100, 100, 200, 100, 100, 200 );
248
249 rend.arc( 100, 100, 100, 0, 60 );
250 rend.circle( 300, 300, 100 );
251 rend.end();*/
252
253 //FillPolygon( vertexs, rend, Color.BLUE );
254
255 angle += 0.5f;
256 /* if( angle > 360 ){
257 angle -= 360;
258 }*/
259
260 //angle =
261 //FillRect( 300, 300, 100, 100, 0, angle, rend, Color.BLUE );
262
263
264 //FillRect1( 300, 300, 100, 100, 0, angle, rend, new Color( 1f, 0.7f, 0.7f, 0.5f ));
265 //FillRect( 300, 300, 100, 100, 0, 90, rend, new Color( 1, 1, 1, 0 ) );
266 //FillRect2( 300, 300, 100, 100, 0, angle, rend, Color.BLUE);
267
268 FillPartRect( 300, 300, 100, 100, 90, 360-angle, rend, Color.BLUE);
269 }
270
271 @Override
272 public void dispose() {
273 // TODO Auto-generated method stub
274 rend.dispose();
275 super.dispose();
276 }
277
278 }
运行结果：
