001    package net.minecraft.src;
002    
003    import cpw.mods.fml.common.Side;
004    import cpw.mods.fml.common.asm.SideOnly;
005    import java.nio.FloatBuffer;
006    import java.util.Random;
007    import net.minecraft.client.Minecraft;
008    import org.lwjgl.opengl.GL11;
009    
010    @SideOnly(Side.CLIENT)
011    public class RenderEndPortal extends TileEntitySpecialRenderer
012    {
013        FloatBuffer field_76908_a = GLAllocation.createDirectFloatBuffer(16);
014    
015        /**
016         * Renders the End Portal.
017         */
018        public void renderEndPortalTileEntity(TileEntityEndPortal par1TileEntityEndPortal, double par2, double par4, double par6, float par8)
019        {
020            float var9 = (float)this.tileEntityRenderer.playerX;
021            float var10 = (float)this.tileEntityRenderer.playerY;
022            float var11 = (float)this.tileEntityRenderer.playerZ;
023            GL11.glDisable(GL11.GL_LIGHTING);
024            Random var12 = new Random(31100L);
025            float var13 = 0.75F;
026    
027            for (int var14 = 0; var14 < 16; ++var14)
028            {
029                GL11.glPushMatrix();
030                float var15 = (float)(16 - var14);
031                float var16 = 0.0625F;
032                float var17 = 1.0F / (var15 + 1.0F);
033    
034                if (var14 == 0)
035                {
036                    this.bindTextureByName("/misc/tunnel.png");
037                    var17 = 0.1F;
038                    var15 = 65.0F;
039                    var16 = 0.125F;
040                    GL11.glEnable(GL11.GL_BLEND);
041                    GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
042                }
043    
044                if (var14 == 1)
045                {
046                    this.bindTextureByName("/misc/particlefield.png");
047                    GL11.glEnable(GL11.GL_BLEND);
048                    GL11.glBlendFunc(GL11.GL_ONE, GL11.GL_ONE);
049                    var16 = 0.5F;
050                }
051    
052                float var18 = (float)(-(par4 + (double)var13));
053                float var19 = var18 + ActiveRenderInfo.objectY;
054                float var20 = var18 + var15 + ActiveRenderInfo.objectY;
055                float var21 = var19 / var20;
056                var21 += (float)(par4 + (double)var13);
057                GL11.glTranslatef(var9, var21, var11);
058                GL11.glTexGeni(GL11.GL_S, GL11.GL_TEXTURE_GEN_MODE, GL11.GL_OBJECT_LINEAR);
059                GL11.glTexGeni(GL11.GL_T, GL11.GL_TEXTURE_GEN_MODE, GL11.GL_OBJECT_LINEAR);
060                GL11.glTexGeni(GL11.GL_R, GL11.GL_TEXTURE_GEN_MODE, GL11.GL_OBJECT_LINEAR);
061                GL11.glTexGeni(GL11.GL_Q, GL11.GL_TEXTURE_GEN_MODE, GL11.GL_EYE_LINEAR);
062                GL11.glTexGen(GL11.GL_S, GL11.GL_OBJECT_PLANE, this.func_76907_a(1.0F, 0.0F, 0.0F, 0.0F));
063                GL11.glTexGen(GL11.GL_T, GL11.GL_OBJECT_PLANE, this.func_76907_a(0.0F, 0.0F, 1.0F, 0.0F));
064                GL11.glTexGen(GL11.GL_R, GL11.GL_OBJECT_PLANE, this.func_76907_a(0.0F, 0.0F, 0.0F, 1.0F));
065                GL11.glTexGen(GL11.GL_Q, GL11.GL_EYE_PLANE, this.func_76907_a(0.0F, 1.0F, 0.0F, 0.0F));
066                GL11.glEnable(GL11.GL_TEXTURE_GEN_S);
067                GL11.glEnable(GL11.GL_TEXTURE_GEN_T);
068                GL11.glEnable(GL11.GL_TEXTURE_GEN_R);
069                GL11.glEnable(GL11.GL_TEXTURE_GEN_Q);
070                GL11.glPopMatrix();
071                GL11.glMatrixMode(GL11.GL_TEXTURE);
072                GL11.glPushMatrix();
073                GL11.glLoadIdentity();
074                GL11.glTranslatef(0.0F, (float)(Minecraft.getSystemTime() % 700000L) / 700000.0F, 0.0F);
075                GL11.glScalef(var16, var16, var16);
076                GL11.glTranslatef(0.5F, 0.5F, 0.0F);
077                GL11.glRotatef((float)(var14 * var14 * 4321 + var14 * 9) * 2.0F, 0.0F, 0.0F, 1.0F);
078                GL11.glTranslatef(-0.5F, -0.5F, 0.0F);
079                GL11.glTranslatef(-var9, -var11, -var10);
080                var19 = var18 + ActiveRenderInfo.objectY;
081                GL11.glTranslatef(ActiveRenderInfo.objectX * var15 / var19, ActiveRenderInfo.objectZ * var15 / var19, -var10);
082                Tessellator var24 = Tessellator.instance;
083                var24.startDrawingQuads();
084                var21 = var12.nextFloat() * 0.5F + 0.1F;
085                float var22 = var12.nextFloat() * 0.5F + 0.4F;
086                float var23 = var12.nextFloat() * 0.5F + 0.5F;
087    
088                if (var14 == 0)
089                {
090                    var23 = 1.0F;
091                    var22 = 1.0F;
092                    var21 = 1.0F;
093                }
094    
095                var24.setColorRGBA_F(var21 * var17, var22 * var17, var23 * var17, 1.0F);
096                var24.addVertex(par2, par4 + (double)var13, par6);
097                var24.addVertex(par2, par4 + (double)var13, par6 + 1.0D);
098                var24.addVertex(par2 + 1.0D, par4 + (double)var13, par6 + 1.0D);
099                var24.addVertex(par2 + 1.0D, par4 + (double)var13, par6);
100                var24.draw();
101                GL11.glPopMatrix();
102                GL11.glMatrixMode(GL11.GL_MODELVIEW);
103            }
104    
105            GL11.glDisable(GL11.GL_BLEND);
106            GL11.glDisable(GL11.GL_TEXTURE_GEN_S);
107            GL11.glDisable(GL11.GL_TEXTURE_GEN_T);
108            GL11.glDisable(GL11.GL_TEXTURE_GEN_R);
109            GL11.glDisable(GL11.GL_TEXTURE_GEN_Q);
110            GL11.glEnable(GL11.GL_LIGHTING);
111        }
112    
113        private FloatBuffer func_76907_a(float par1, float par2, float par3, float par4)
114        {
115            this.field_76908_a.clear();
116            this.field_76908_a.put(par1).put(par2).put(par3).put(par4);
117            this.field_76908_a.flip();
118            return this.field_76908_a;
119        }
120    
121        public void renderTileEntityAt(TileEntity par1TileEntity, double par2, double par4, double par6, float par8)
122        {
123            this.renderEndPortalTileEntity((TileEntityEndPortal)par1TileEntity, par2, par4, par6, par8);
124        }
125    }