代码:

1. @Override
   
2.     public void doRender(EntityMagicBullet entity, double x, double y, double z,float entityYaw, float partialTicks) {
   
3.    ResourceLocation T=new ResourceLocation(Dataextension.MODID, "textures/entity/MagicBullet.png");
   
4.    Minecraft.getMinecraft().renderEngine.bindTexture(T);//绑定贴图
   
5.    GlStateManager.disableCull();//開啟雙面顯示
   
6.    GlStateManager.pushMatrix();//压入当前矩阵堆栈
   
7.    GlStateManager.disableLighting();//關閉自帶光源
   
8.    GlStateManager.enableBlend();//開啟不透明度
   
9.    GlStateManager.blendFunc(GlStateManager.SourceFactor.SRC_ALPHA, GlStateManager.DestFactor.ONE_MINUS_SRC_ALPHA);
   
10.    GlStateManager.translate((float)x, (float)y, (float)z);//坐標
    
11.    
    
12.    GlStateManager.rotate(entity.prevRotationYaw + (entity.rotationYaw - entity.prevRotationYaw) * partialTicks - 90.0F, 0.0F, 1.0F, 0.0F);
    
13.    GlStateManager.rotate(entity.prevRotationPitch + (entity.rotationPitch - entity.prevRotationPitch) * partialTicks, 0.0F, 0.0F, 1.0F);
    
14.    
    
15.     Tessellator tessellator = Tessellator.getInstance();//3D绘图的实例
    
16.    BufferBuilder vertexbuffer = tessellator.getBuffer();//顶点计算
    
17.    GlStateManager.enableRescaleNormal();//重新规范化法向量
    
18.    GlStateManager.scale(0.05625F, 0.05625F, 0.05625F);//设置大小
    
19.    GlStateManager.translate(-3.0F, 0.0F, 0.0F);//把渲染图形往箭尾移动一
    
20.    
    
21.    OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, 240f, 240f); //光照相关
    
22.    
    
23.    for (int j = 0; j < 1; ++j){
    
24.     GlStateManager.rotate(90.0F, 1.0F, 0.0F, 0.0F);//x轴旋转90度
    
25. 
    
26.     vertexbuffer.begin(7, DefaultVertexFormats.POSITION_TEX);//开始绘制
    
27.     vertexbuffer.pos(-3.0D, -3.0D, 3.0D).tex(0.0D,0.0D).endVertex();//点1
    
28.     vertexbuffer.pos(3.0D, -3.0D, 3.0D).tex(4.0D, 0.0D).endVertex();//点2
    
29.     vertexbuffer.pos(3.0D, 3.0D, 3.0D).tex(4.0D, 4.0D).endVertex();//点3
    
30.     vertexbuffer.pos(-3.0D, 3.0D, 3.0D).tex(0.0D, 4.0D).endVertex();//点4
    
31.   //4个点绘制一个四边形
    
32.     tessellator.draw();
    
33. 
    
34.     vertexbuffer.begin(7, DefaultVertexFormats.POSITION_TEX);
    
35.     vertexbuffer.pos(-9.0D, 0.0D, 0.0D).tex(0.0D, 0.0D).endVertex();
    
36.     vertexbuffer.pos(-3.0D, -3.0D, 3.0D).tex(4.0, 0.0D).endVertex();
    
37.     vertexbuffer.pos(-3.0D, 3.0D, 3.0D).tex(4.0, 4.0D).endVertex();
    
38.     vertexbuffer.pos(-9.0D, 0.0D, 0.0D).tex(0.0D, 4.0D).endVertex();
    
39.     tessellator.draw();
    
40. 
    
41.    vertexbuffer.begin(7, DefaultVertexFormats.POSITION_TEX);
    
42.     vertexbuffer.pos(9.0D, 0.0D, 0.0D).tex(0.0D, 0.0D).endVertex();
    
43.     vertexbuffer.pos(3.0D, 3.0D, 3.0D).tex(4.0D, 0.0D).endVertex();
    
44.     vertexbuffer.pos(3.0D, -3.0D, 3.0D).tex(4.0D, 4.0D).endVertex();
    
45.     vertexbuffer.pos(9.0D, 0.0D, 0.0D).tex(0.0D, 4.0D).endVertex();
    
46.     tessellator.draw();
    
47.    }
    
48.    
    
49.    GlStateManager.disableRescaleNormal();//关闭规范化法向量
    
50.    GlStateManager.enableLighting();//開啟自帶光源
    
51.    GlStateManager.enableCull();//關閉雙面顯示
    
52.    GlStateManager.disableBlend();//關閉不透明度
    
53.    GlStateManager.popMatrix();//弹出当前矩阵堆栈
    
54.    super.doRender(entity, x, y, z, entityYaw, partialTicks);
    
55.     }