libgdx学习记录13——矩形CD进度条绘制
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。
public Vector2 GetPoint( float x, float y, float w, float h, float angle ){
Vector2 point = new Vector2();
while( angle >= 360 ){
angle -= 360;
}
while( angle < 0 ){
angle += 360;
}
System.out.println( GetAtan( h/w ) );
if( angle>=0 && angle<GetAtan( h/w ) || angle>=360-GetAtan( h/w ) && angle<360 ){
point.x = x+w;
point.y = y+w*Change( angle );
}
else if( angle>=GetAtan( h/w ) && angle<180-GetAtan( h/w ) ){
point.x = x+h*Change( 90-angle );
point.y = y+h;
}
else if( angle>=180-GetAtan( h/w ) && angle<180+GetAtan( h/w ) ){
point.x = x-w;
point.y = y-w*Change( angle );
}
else if( angle>=180+GetAtan( h/w ) && angle<360-GetAtan( h/w ) ){
point.x = x-h*Change( 90-angle );
point.y = y-h;
}
return point;
}
画部分矩形
public void FillPartRect( float x, float y, float w, float h, float start, float angle, ShapeRenderer rend, Color color )
{
rend.begin( ShapeType.Line );
rend.setColor( color );
rend.rect( x-w, y-h, 2*w, 2*h );
rend.end(); rend.begin( ShapeType.Filled ); for( int i=0; i<angle-1; i++ ){
Vector2 point1 = GetPoint( x, y, w, h, start+i );
Vector2 point2 = GetPoint( x, y, w, h, start+i+1 );
rend.triangle( x, y, point1.x, point1.y, point2.x, point2.y );
}
rend.end();
}
全部代码如下：
package com.fxb.newtest; import sun.security.provider.certpath.Vertex; import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.graphics.Pixmap;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer.ShapeType;
import com.badlogic.gdx.math.Rectangle;
import com.badlogic.gdx.math.Vector2; public class Lib012_CdDraw extends ApplicationAdapter{ ShapeRenderer rend; float[] vertexs; Pixmap pixmap;
float angle = 0; @Override
public void create() {
// TODO Auto-generated method stub
rend = new ShapeRenderer(); vertexs = new float[]{ 100, 100, 250, 100, 200, 200, 100, 250 }; } public void FillPolygon( float[] vertexs, ShapeRenderer rend, Color color ){
if( vertexs.length%2 != 0 ){
return;
}
rend.begin( ShapeType.Filled );
rend.setColor( color );
for( int i=2; i<=vertexs.length-4; i+=2 ){
rend.triangle( vertexs[0], vertexs[1], vertexs[i], vertexs[i+1], vertexs[i+2], vertexs[i+3] );
}
rend.end();
} public float Change( float angle0 ){
return (float)Math.tan( angle0*(float)Math.PI/180 );
} public void FillRect( float x, float y, float w, float h, float start, float angle, ShapeRenderer rend, Color color ){ rend.begin( ShapeType.Line );
rend.setColor( color );
rend.rect( x-w, y-h, 2*w, 2*h );
rend.end(); rend.begin( ShapeType.Filled );
rend.setColor( color );
//angle = angle*(float)Math.PI/180; if( angle <= 45 ){
rend.triangle( x, y, x+w, y, x+w, y+w*(float)Math.tan( angle*(float)Math.PI/180 ) );
}
else if( angle <= 135 ){
rend.triangle( x, y, x+w, y, x+w, y+w );
rend.triangle( x, y, x+w, y+h, x+h*(float)Math.tan( (90-angle)*(float)Math.PI/180 ), y+h );
}
else if( angle <= 135+90 ){
rend.triangle( x, y, x+w, y, x+w, y+w );
rend.triangle( x, y, x+w, y+h, x-w, y+h );
rend.triangle( x, y, x-w, y+h, x-w, y-w*Change( angle ) );
}
else if( angle <= 135+180 ){
rend.triangle( x, y, x+w, y, x+w, y+w );
rend.triangle( x, y, x+w, y+h, x-w, y+h );
rend.triangle( x, y, x-w, y+h, x-w, y-h );
rend.triangle( x, y, x-w, y-h, x-h*Change( 270-angle ), y-h );
}
else if( angle <= 360 ){
rend.triangle( x, y, x+w, y, x+w, y+w );
rend.triangle( x, y, x+w, y+h, x-w, y+h );
rend.triangle( x, y, x-w, y+h, x-w, y-h );
rend.triangle( x, y, x-w, y-h, x+w, y-h );
rend.triangle( x, y, x+w, y-h, x+w, y+w*Change(angle) );
} rend.end();
} public float GetAtan( float angle ){
return (float)( 180*Math.atan( angle )/Math.PI );
} public Vector2 GetPoint( float x, float y, float w, float h, float angle ){
Vector2 point = new Vector2();
while( angle >= 360 ){
angle -= 360;
}
while( angle < 0 ){
angle += 360;
} System.out.println( GetAtan( h/w ) ); if( angle>=0 && angle<GetAtan( h/w ) || angle>=360-GetAtan( h/w ) && angle<360 ){
point.x = x+w;
point.y = y+w*Change( angle );
}
else if( angle>=GetAtan( h/w ) && angle<180-GetAtan( h/w ) ){
point.x = x+h*Change( 90-angle );
point.y = y+h;
}
else if( angle>=180-GetAtan( h/w ) && angle<180+GetAtan( h/w ) ){
point.x = x-w;
point.y = y-w*Change( angle );
}
else if( angle>=180+GetAtan( h/w ) && angle<360-GetAtan( h/w ) ){
point.x = x-h*Change( 90-angle );
point.y = y-h;
} return point;
} public void FillRect1( float x, float y, float w, float h, float start, float angle, ShapeRenderer rend, Color color ){ rend.begin( ShapeType.Line );
rend.setColor( color );
rend.rect( x-w, y-h, 2*w, 2*h );
rend.end(); rend.begin( ShapeType.Filled );
rend.setColor( color );
//angle = angle*(float)Math.PI/180; if( angle <= 45 ){
rend.triangle( x, y, x, y+h, x+h*Change( angle ), y+h );
}
else if( angle <= 135 ){
rend.triangle( x, y, x, y+h, x+w, y+w );
rend.triangle( x, y, x+w, y+h, x+w, y+w*Change( 90-angle ) );
}
else if( angle <= 135+90 ){
rend.triangle( x, y, x, y+h, x+w, y+w );
rend.triangle( x, y, x+w, y+h, x+w, y-h );
rend.triangle( x, y, x+w, y-h, x-h*Change( angle ), y-h );
}
else if( angle <= 135+180 ){
rend.triangle( x, y, x, y+h, x+w, y+w );
rend.triangle( x, y, x+w, y+h, x+w, y-h );
rend.triangle( x, y, x+w, y-h, x-w, y-h );
rend.triangle( x, y, x-w, y-h, x-w, y-w*Change( 270-angle ) );
}
else if( angle <= 360 ){
rend.triangle( x, y, x, y+h, x+w, y+w );
rend.triangle( x, y, x+w, y+h, x+w, y-h );
rend.triangle( x, y, x+w, y-h, x-w, y-h );
rend.triangle( x, y, x-w, y-h, x-w, y+h );
rend.triangle( x, y, x-w, y+h, x+h*Change( angle ), y+h );
} rend.end();
} public void FillRect2( float x, float y, float w, float h, float start, float angle, ShapeRenderer rend, Color color ){ rend.begin( ShapeType.Line );
rend.setColor( color );
rend.rect( x-w, y-h, 2*w, 2*h );
rend.end(); rend.begin( ShapeType.Filled );
rend.setColor( color );
//angle = angle*(float)Math.PI/180;
rend.rect( x-w, y-h, 2*w, 2*h ); //rend.setColor( color.mul( 0.5f ) ); if( angle <= 45 ){
rend.triangle( x, y, x, y+h, x+h*Change( angle ), y+h );
}
else if( angle <= 135 ){
rend.triangle( x, y, x, y+h, x+w, y+w );
rend.triangle( x, y, x+w, y+h, x+w, y+w*Change( 90-angle ) );
}
else if( angle <= 135+90 ){
rend.triangle( x, y, x, y+h, x+w, y+w );
rend.triangle( x, y, x+w, y+h, x+w, y-h );
rend.triangle( x, y, x+w, y-h, x-h*Change( angle ), y-h );
}
else if( angle <= 135+180 ){
rend.triangle( x, y, x, y+h, x+w, y+w );
rend.triangle( x, y, x+w, y+h, x+w, y-h );
rend.triangle( x, y, x+w, y-h, x-w, y-h );
rend.triangle( x, y, x-w, y-h, x-w, y-w*Change( 270-angle ) );
}
else if( angle <= 360 ){
rend.triangle( x, y, x, y+h, x+w, y+w );
rend.triangle( x, y, x+w, y+h, x+w, y-h );
rend.triangle( x, y, x+w, y-h, x-w, y-h );
rend.triangle( x, y, x-w, y-h, x-w, y+h );
rend.triangle( x, y, x-w, y+h, x+h*Change( angle ), y+h );
} rend.end();
} public void FillPartRect( float x, float y, float w, float h, float start, float angle, ShapeRenderer rend, Color color )
{
rend.begin( ShapeType.Line );
rend.setColor( color );
rend.rect( x-w, y-h, 2*w, 2*h );
rend.end(); rend.begin( ShapeType.Filled ); for( int i=0; i<angle-1; i++ ){
Vector2 point1 = GetPoint( x, y, w, h, start+i );
Vector2 point2 = GetPoint( x, y, w, h, start+i+1 );
rend.triangle( x, y, point1.x, point1.y, point2.x, point2.y );
}
rend.end();
} public void FillCircle( ){ } @Override
public void render() {
// TODO Auto-generated method stub
Gdx.gl.glClearColor( 0, 1, 1, 1 );
Gdx.gl.glClear( GL10.GL_COLOR_BUFFER_BIT ); Gdx.gl.glEnable( GL10.GL_BLEND );
Gdx.gl.glBlendFunc( GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA ); /* rend.begin( ShapeType.Filled );
rend.setColor( Color.BLUE );
//rend.polyline( vertexs );
//rend.line( 100, 100, 200, 200 );
//rend.triangle( 100, 100, 200, 100, 100, 200 ); rend.arc( 100, 100, 100, 0, 60 );
rend.circle( 300, 300, 100 );
rend.end();*/ //FillPolygon( vertexs, rend, Color.BLUE ); angle += 0.5f;
/* if( angle > 360 ){
angle -= 360;
}*/ //angle =
//FillRect( 300, 300, 100, 100, 0, angle, rend, Color.BLUE ); //FillRect1( 300, 300, 100, 100, 0, angle, rend, new Color( 1f, 0.7f, 0.7f, 0.5f ));
//FillRect( 300, 300, 100, 100, 0, 90, rend, new Color( 1, 1, 1, 0 ) );
//FillRect2( 300, 300, 100, 100, 0, angle, rend, Color.BLUE); FillPartRect( 300, 300, 100, 100, 90, 360-angle, rend, Color.BLUE);
} @Override
public void dispose() {
// TODO Auto-generated method stub
rend.dispose();
super.dispose();
} }
运行结果：
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