libgdx绘制线段

转载自：http://my.oschina.net/oahcfly/blog/591595?p={{currentPage+1}}

使用ShapeRenderer进行绘制

package com.oahcfly.chgame.core.ui;import com.badlogic.gdx.graphics.Color;import com.badlogic.gdx.graphics.g2d.Batch;import com.badlogic.gdx.graphics.glutils.ShapeRenderer;import com.badlogic.gdx.graphics.glutils.ShapeRenderer.ShapeType;import com.badlogic.gdx.math.Bezier;import com.badlogic.gdx.math.Vector2;import com.oahcfly.chgame.core.mvc.CHActor;/** *  * 贝塞尔路线 : 使用ShapeRenderer绘制 * @author haocao * */public class CHBezierLine extends CHActor {// 以左上角为原点进行绘制的private ShapeRenderer shapeRenderer;private Bezier<Vector2> bezier;// 点列表private Vector2[] points;// 线条颜色private Color lineColor = Color.RED;public CHBezierLine (Bezier<Vector2> bezier) {this(bezier, Color.RED);}public CHBezierLine (Bezier<Vector2> bezier, Color lineColor) {updateBezier(bezier);this.lineColor = lineColor;shapeRenderer = new ShapeRenderer();shapeRenderer.setAutoShapeType(true);}/** * 更新贝塞尔曲线参数 * @param bezier */public void updateBezier (Bezier<Vector2> bezier) {this.bezier = bezier;// 计算所有点int dis = (int)(this.bezier.points.get(this.bezier.points.size - 1).x - this.bezier.points.get(0).x);if (dis == 0) {dis = (int)(this.bezier.points.get(this.bezier.points.size - 1).y - this.bezier.points.get(0).y);}points = new Vector2[dis];for (int i = 0; i < dis; i++) {float t = i * 1f / dis;Vector2 out = new Vector2();this.bezier.valueAt(out, t);points[i] = out;}}@Overridepublic void draw (Batch batch, float parentAlpha) {batch.flush();// 设置用于渲染的投影矩阵getStage().getCamera().update();shapeRenderer.setProjectionMatrix(getStage().getCamera().combined);shapeRenderer.begin(ShapeType.Line);shapeRenderer.setColor(this.lineColor);for (int i = 0, l = points.length - 1; i < l; i++) {Vector2 cur = points[i];Vector2 next = points[i + 1];shapeRenderer.line(cur, next);}shapeRenderer.end();// 结束本次绘制batch.end();// 重新开始新的batch.begin();}@Overridepublic boolean remove () {// TODO Auto-generated method stubshapeRenderer.dispose();return super.remove();}}

关联代码：

package com.oahcfly.chgame.core.mvc;import com.badlogic.gdx.graphics.Color;import com.badlogic.gdx.graphics.Texture;import com.badlogic.gdx.graphics.g2d.Batch;import com.badlogic.gdx.graphics.g2d.Sprite;import com.badlogic.gdx.graphics.g2d.TextureAtlas.AtlasRegion;import com.badlogic.gdx.graphics.g2d.TextureRegion;import com.badlogic.gdx.math.Rectangle;import com.badlogic.gdx.scenes.scene2d.Actor;import com.badlogic.gdx.utils.Align;import com.badlogic.gdx.utils.Array;import com.badlogic.gdx.utils.Pool;import com.badlogic.gdx.utils.Pool.Poolable;import com.badlogic.gdx.utils.Pools;import com.oahcfly.chgame.core.Chao;/** <pre> * 二次封装的actor *  * date: 2014-12-11 * </pre> *  * @author caohao */public class CHActor extends Actor implements Poolable {private int tag;private Texture bgTexture;private TextureRegion bgTextureRegion;private Sprite sprite;public CHActor () {}/** * 绑定一个精灵，此时CHActor的属性会同步到精灵上。 * @param sprite */public void bindSprite (Sprite sprite) {this.sprite = sprite;setSize(this.sprite.getWidth(), this.sprite.getHeight());setOrigin(Align.center);}@Overridepublic void draw (Batch batch, float parentAlpha) {if (clipRectangleArr.size > 0) {for (Rectangle cRectangle : clipRectangleArr) {this.drawCore(batch, parentAlpha, cRectangle);}} else {this.drawCore(batch, parentAlpha, null);}}/** * 核心绘制 * @param batch * @param parentAlpha * @param clipRectangle */private void drawCore (Batch batch, float parentAlpha, Rectangle clipRectangle) {boolean clipok = false;// 开始裁剪if (clipRectangle != null) {batch.flush(); // 绘制之前添加的元素，如果不添加此处代码，后面的裁剪会导致之前的纹理也会被裁剪clipok = clipBegin(getX() + clipRectangle.x, getY() + clipRectangle.y, clipRectangle.width, clipRectangle.height);}Color color = getColor();batch.setColor(color.r, color.g, color.b, color.a);float x = getX();float y = getY();float scaleX = getScaleX();float scaleY = getScaleY();float width = getWidth();float height = getHeight();if (bgTexture != null) {batch.draw(bgTexture, x, y, getOriginX(), getOriginY(), getWidth(), getHeight(), scaleX, scaleY, getRotation(), 0, 0,(int)width, (int)height, false, false);}if (bgTextureRegion != null) {if (bgTextureRegion instanceof Sprite) {Sprite sprite = (Sprite)bgTextureRegion;sprite.setColor(batch.getColor());sprite.setOrigin(getOriginX(), getOriginY());sprite.setPosition(x, y);sprite.setScale(scaleX, scaleY);sprite.setSize(width, height);sprite.setRotation(getRotation());sprite.draw(batch);} else {batch.draw(bgTextureRegion, x, y, getOriginX(), getOriginY(), width, height, scaleX, scaleY, getRotation());}}if (sprite != null) {sprite.setColor(color);sprite.setOrigin(getOriginX(), getOriginY());sprite.setPosition(x, y);sprite.setScale(scaleX, scaleY);sprite.setSize(width, height);sprite.setRotation(getRotation());sprite.draw(batch);}// 绘制完背景后进行其他内容绘制drawAfterBg(batch);// 提交裁剪内容if (clipok) {batch.flush();clipEnd();}}public void drawAfterBg (Batch batch) {};public void setBgTexture (Texture bgTexture) {this.bgTexture = bgTexture;if (bgTexture != null) {setSize(bgTexture.getWidth(), bgTexture.getHeight());}setOrigin(Align.center);}/** <pre> * 使用缓存池 *  * date: 2015-1-3 * </pre> *  * @author caohao * @return */@SuppressWarnings("unchecked")public static <T extends CHActor> T obtain (Class<T> type) {Pool<CHActor> pool = (Pool<CHActor>)Pools.get(type);CHActor actor = pool.obtain();actor.setBgTexture(null);return (T)actor;}public static CHActor obtain () {return obtain(CHActor.class);}@Overridepublic void reset () {this.bgTexture = null;this.bgTextureRegion = null;clipRectangleArr.clear();setScale(1);setRotation(0);clear();setUserObject(null);this.setColor(new Color(1, 1, 1, 1));setStage(null);setParent(null);setVisible(true);setName(null);setOrigin(Align.center);setPosition(0, 0);}public Texture getBgTexture () {return bgTexture;}public TextureRegion getBgTextureRegion () {return bgTextureRegion;}public void setBgTextureRegion (TextureRegion textureRegion) {this.bgTextureRegion = textureRegion;if (bgTextureRegion != null) {if (bgTextureRegion instanceof Sprite) {Sprite sprite = (Sprite)bgTextureRegion;setSize(sprite.getWidth(), sprite.getHeight());} else if (bgTextureRegion instanceof AtlasRegion) {AtlasRegion atlasRegion = (AtlasRegion)bgTextureRegion;bgTextureRegion = Chao.plistCenter.createSprite(atlasRegion);Sprite sprite = (Sprite)bgTextureRegion;setSize(sprite.getWidth(), sprite.getHeight());} else {setSize(bgTextureRegion.getRegionWidth(), bgTextureRegion.getRegionHeight());}}setOrigin(Align.center);}@Overridepublic boolean remove () {boolean remove = super.remove();if (remove) {Pools.free(this);}return remove;}public int getTag () {return tag;}public void setTag (int tag) {this.tag = tag;}private Array<Rectangle> clipRectangleArr = new Array<Rectangle>();/** * 添加裁剪矩形，范围为当前Actor的显示区域即：(0,0)~(w,h) 左下角 * @param rectangle */public void addClipRectangle (Rectangle rectangle) {clipRectangleArr.add(rectangle);}public Sprite getSprite () {return sprite;}private Rectangle boundsRectangle;@Overrideprotected void sizeChanged () {if (boundsRectangle == null) {boundsRectangle = new Rectangle();}boundsRectangle.width = getWidth();boundsRectangle.height = getHeight();}/** * 用于碰撞检测的矩形区域 * @return */public Rectangle getBoundsRectangle () {boundsRectangle.x = getX();boundsRectangle.y = getY();return boundsRectangle;}}

基于Libgdx开发的开源游戏框架CHGame：

http://git.oschina.net/oahcfly/CHGameFrame