一段midp1纹理的代码，是自己推的肯定不怎么好

 一段纹理的代码，是自己推的肯定不怎么好

可以把float替换为定点数,把image改为一段int 数据

    public void textureTest(float x1,float y1,
                            float x2,float y2,
                            float x3,float y3,
                            float u1,float v1,
                            float u2,float v2,
                            float u3,float v3,
                            Image texture
            )...{
        float dxab,dyab,dxbc,dybc,dxca,dyca;
        
        float duab,dvab,dubc,dvbc,duca,dvca;
        
        dxab=x2-x1;
        dyab=y2-y1;
        
        dxbc=x3-x2;
        dybc=y3-y2;
        
        dxca=x1-x3;
        dyca=y1-y3;
        
        duab=u2-u1;
        dvab=v2-v1;
        
        dubc=u3-u2;
        dvbc=v3-v2;
        
        duca=u1-u3;
        dvca=v1-v3;
        
        float dyu, dyv, dxu, dxv;
        
        
        dyu=(duab*dxbc-dubc*dxab)/(dyab*dxbc-dybc*dxab);
        dyv=(dvab*dxbc-dvbc*dxab)/(dyab*dxbc-dybc*dxab);
        
        dxu=(duab-dyu*dyab)/dxab;
        dxv=(dvab-dyv*dyab)/dxab;
        System.out.println("textuetest, dxu="+dxu);
        System.out.println("textuetest, dxv="+dxv);
        
        int []textureData=new int[texture.getHeight()*texture.getWidth()];
        
        texture.getRGB(textureData,0,texture.getWidth(),0,0,texture.getWidth(),texture.getHeight());
        
        int textureWidth=texture.getWidth();
        int textureHeight=texture.getHeight();
        
        System.out.println("textuetest vpx="+vpx+" vpy="+vpy);
        for(int y=0;y<320/**//*canvas height*/;y++)...{
            for(int x=0;x<240/**//*canvas width*/;x++)...{
                float u,v;
                u=(x-x1)*dxu +(y-y1)*dyu + u1;
                v=(x-x1)*dxv +(y-y1)*dyv + v1;
                
                u=textureTestBetween0to1(u);
                v=textureTestBetween0to1(v);
                
                u*=textureWidth;
                v*=textureHeight;
                
                int ui=(int )u;
                int vi=(int )v;
                if(ui==textureWidth)...{
                    ui=0;
                }
                
                if(vi==textureHeight)...{
                    vi=0;
                }
//                System.out.println("ui="+ui +" vi="+vi);
                
                int color=textureData[ui+vi*textureWidth];
                g.setColor((color&0x00ffffff));
                g.drawLine(x,y,x,y);
            }
        }
        
        g.setColor(0xffffff);
        g.drawLine((int )x1,(int )y1,(int )x2,(int )y2);
        g.drawLine((int )x3,(int )y3,(int )x2,(int )y2);
        g.drawLine((int )x3,(int )y3,(int )x1,(int )y1);
    }
    
    public  float textureTestBetween0to1(float u)...{
        if(u<0)...{
            u=u-((int)u)+1;
        }else if(u>=1)...{
            u=u-((int)u);
        }
        return u;
    }