vazkii.gencreator.client.SelectionRenderHandler.java Source code

Introduction

Here is the source code for vazkii.gencreator.client.SelectionRenderHandler.java

Source

/**
 * This Code is Open Source and distributed under a
 * Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License
 * (http://creativecommons.org/licenses/by-nc-sa/3.0/deed.en_GB)
 */
// Created @ 18 Apr 2013
package vazkii.gencreator.client;

import java.awt.Color;

import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.entity.RenderManager;
import net.minecraft.util.ChunkCoordinates;
import net.minecraftforge.client.event.RenderWorldLastEvent;

import org.lwjgl.opengl.GL11;

import vazkii.gencreator.DataStorage;
import vazkii.gencreator.helper.BoundingBox;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;

/**
 * SelectionRenderHandler
 *
 * Render for the world selection.
 *
 * @author Vazkii
 */
public class SelectionRenderHandler {

    @SubscribeEvent
    public void onWorldRenderLast(RenderWorldLastEvent event) {
        GL11.glPushMatrix();
        GL11.glDisable(GL11.GL_DEPTH_TEST);
        GL11.glDisable(GL11.GL_TEXTURE_2D);
        GL11.glEnable(GL11.GL_BLEND);

        Tessellator.renderingWorldRenderer = false;

        if (DataStorage.selection != null) {
            BoundingBox sel = DataStorage.selection;
            ChunkCoordinates startCoord = new ChunkCoordinates(sel.minX, sel.minY, sel.minZ);
            ChunkCoordinates size = new ChunkCoordinates(sel.getXSize(), sel.getYSize(), sel.getZSize());

            renderSizedOutlineAt(startCoord, 0x222299, size);
        }

        if (DataStorage.point1 != null)
            renderBlockOutlineAt(DataStorage.point1, 0xFFFF00);

        if (DataStorage.point2 != null)
            renderBlockOutlineAt(DataStorage.point2, 0x00FF00);

        GL11.glEnable(GL11.GL_DEPTH_TEST);
        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glDisable(GL11.GL_BLEND);

        GL11.glPopMatrix();
    }

    private void renderBlockOutlineAt(ChunkCoordinates pos, int color) {
        GL11.glPushMatrix();
        GL11.glTranslated(pos.posX - RenderManager.renderPosX, pos.posY + 1 - RenderManager.renderPosY,
                pos.posZ - RenderManager.renderPosZ);
        GL11.glScalef(1.0F, -1.0F, -1.0F);
        Color colorRGB = new Color(color);
        GL11.glColor4ub((byte) colorRGB.getRed(), (byte) colorRGB.getGreen(), (byte) colorRGB.getBlue(),
                (byte) 127);
        renderBlockOutline();
        GL11.glPopMatrix();
    }

    private void renderSizedOutlineAt(ChunkCoordinates pos, int color, ChunkCoordinates size) {
        GL11.glPushMatrix();
        GL11.glTranslated(pos.posX - RenderManager.renderPosX, pos.posY - RenderManager.renderPosY,
                pos.posZ - RenderManager.renderPosZ);
        //GL11.glScalef(1.0F, -1.0F, -1.0F);
        Color colorRGB = new Color(color);
        GL11.glColor4ub((byte) colorRGB.getRed(), (byte) colorRGB.getGreen(), (byte) colorRGB.getBlue(),
                (byte) 190);
        renderSizedOutline(size);
        GL11.glPopMatrix();
    }

    // Must be translated
    private void renderBlockOutline() {
        Tessellator tessellator = Tessellator.instance;

        tessellator.startDrawing(GL11.GL_LINES);

        tessellator.addVertex(0, 0, 0);
        tessellator.addVertex(0, 1, 0);
        tessellator.addVertex(0, 1, 0);
        tessellator.addVertex(1, 1, 0);
        tessellator.addVertex(1, 1, 0);
        tessellator.addVertex(1, 0, 0);
        tessellator.addVertex(1, 0, 0);
        tessellator.addVertex(0, 0, 0);
        tessellator.addVertex(0, 0, -1);
        tessellator.addVertex(0, 1, -1);
        tessellator.addVertex(0, 0, -1);
        tessellator.addVertex(1, 0, -1);
        tessellator.addVertex(1, 0, -1);
        tessellator.addVertex(1, 1, -1);
        tessellator.addVertex(0, 1, -1);
        tessellator.addVertex(1, 1, -1);
        tessellator.addVertex(0, 0, 0);
        tessellator.addVertex(0, 0, -1);
        tessellator.addVertex(0, 1, 0);
        tessellator.addVertex(0, 1, -1);
        tessellator.addVertex(1, 0, 0);
        tessellator.addVertex(1, 0, -1);
        tessellator.addVertex(1, 1, 0);
        tessellator.addVertex(1, 1, -1);

        tessellator.draw();
    }

    // Must be translated
    private void renderSizedOutline(ChunkCoordinates size) {
        Tessellator tessellator = Tessellator.instance;

        tessellator.startDrawing(GL11.GL_LINES);

        tessellator.addVertex(0, 0, 0);
        tessellator.addVertex(0, size.posY, 0);
        tessellator.addVertex(0, size.posY, 0);
        tessellator.addVertex(size.posX, size.posY, 0);
        tessellator.addVertex(size.posX, size.posY, 0);
        tessellator.addVertex(size.posX, 0, 0);
        tessellator.addVertex(size.posX, 0, 0);
        tessellator.addVertex(0, 0, 0);
        tessellator.addVertex(0, 0, size.posZ);
        tessellator.addVertex(0, size.posY, size.posZ);
        tessellator.addVertex(0, 0, size.posZ);
        tessellator.addVertex(size.posX, 0, size.posZ);
        tessellator.addVertex(size.posX, 0, size.posZ);
        tessellator.addVertex(size.posX, size.posY, size.posZ);
        tessellator.addVertex(0, size.posY, size.posZ);
        tessellator.addVertex(size.posX, size.posY, size.posZ);
        tessellator.addVertex(0, 0, 0);
        tessellator.addVertex(0, 0, size.posZ);
        tessellator.addVertex(0, size.posY, 0);
        tessellator.addVertex(0, size.posY, size.posZ);
        tessellator.addVertex(size.posX, 0, 0);
        tessellator.addVertex(size.posX, 0, size.posZ);
        tessellator.addVertex(size.posX, size.posY, 0);
        tessellator.addVertex(size.posX, size.posY, size.posZ);

        tessellator.draw();
    }

}