RendererPoster.java

/**
 * 
 */
package cn.dawn47.misc.client;

import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.entity.RenderEntity;
import net.minecraft.entity.Entity;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.Vec3;
import net.minecraftforge.common.util.ForgeDirection;

import org.lwjgl.opengl.GL11;

import cn.dawn47.core.proxy.DWResources;
import cn.dawn47.misc.entity.EntityPoster;
import cn.liutils.util.client.RenderUtils;
import cn.liutils.util.generic.VecUtils;

/**
 * @author WeathFolD
 *
 */
public class RendererPoster extends RenderEntity {
    
    final Vec3 vecs[] = {
        VecUtils.vec(0, 0, 0),
        VecUtils.vec(1, 0, 0),
        VecUtils.vec(1, 1, 0),
        VecUtils.vec(0, 1, 0)
    };
    double uvs[][] = {
            {0, 1},
            {1, 1},
            {1, 0},
            {0, 0}
    };

    public RendererPoster() {
    }

    /* (non-Javadoc)
     * @see net.minecraft.client.renderer.entity.Render#doRender(net.minecraft.entity.Entity, double, double, double, float, float)
     */
    @Override
    public void doRender(Entity var1, double var2, double var4, double var6,
            float var8, float var9) {
        EntityPoster poster = (EntityPoster) var1;
        Tessellator t = Tessellator.instance;
        //super.doRender(var1, var2, var4, var6, var8, var9);
        
        GL11.glPushMatrix(); {
            GL11.glTranslated(var2, var4, var6);
            RenderUtils.loadTexture(DWResources.POSTER_TEXTURE_PATH[poster.posterID]);
            
            ForgeDirection dir = poster.attachedSide;
            int side = poster.attachedSide.ordinal();
            //x和z坐标是否需要互换（旋转90度）
            boolean swap = side == 4 || side == 5;
            //是否需要渲染反面
            boolean reverse = side == 2 || side == 5;
            
            if(reverse)
                GL11.glTranslated(-poster.attachedSide.offsetZ, 0, poster.attachedSide.offsetX);
            
            t.startDrawingQuads();
            t.setNormal(dir.offsetX, 0, dir.offsetZ);
            for(int i = 0; i < 4; ++i) {
                Vec3 vec = vecs[i].addVector(0, 0, 0);
                vec.xCoord *= EntityPoster.infs[poster.posterID].width * (reverse ? -1 : 1);
                vec.yCoord *= EntityPoster.infs[poster.posterID].height;
                
                if(swap) {
                    double tmp = vec.xCoord;
                    vec.xCoord = vec.zCoord;
                    vec.zCoord = tmp;
                }
                RenderUtils.addVertex(vec, uvs[i][0], uvs[i][1]);
            }
            t.draw();
        } GL11.glPopMatrix();
        //super.renderOffsetAABB(var1.boundingBox, var2, var4, var6);
    }

    @Override
    protected ResourceLocation getEntityTexture(Entity var1) {
        return null;
    }

}