Java tutorial
/* This file is part of Project-Zed. Project-Zed is free software: you can redistribute it and/or modify it under the terms of the GNU General Public * License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Project-Zed is * distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A * PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along * with Project-Zed. If not, see <http://www.gnu.org/licenses/> */ package com.projectzed.mod.renderer; import org.lwjgl.opengl.GL11; import net.minecraft.client.renderer.Tessellator; import net.minecraft.item.ItemStack; import net.minecraft.util.IIcon; import net.minecraftforge.client.IItemRenderer.ItemRenderType; import com.hockeyhurd.api.item.AbstractItemRenderer; /** * Class containing code for rendering fluid tanks as item. * * @author hockeyhurd * @version Jan 24, 2015 */ public class FluidTankItemRenderer extends AbstractItemRenderer { protected Tessellator tess; protected final float PIXEL = 1f / 16f; protected float calc = 4f * PIXEL; protected boolean renderInside = true; /** * @param icon = icon to draw from. */ public FluidTankItemRenderer(IIcon icon) { super(icon); this.tess = Tessellator.instance; } /* * (non-Javadoc) * @see com.hockeyhurd.api.item.AbstractItemRenderer#renderItem(net.minecraftforge.client.IItemRenderer.ItemRenderType, net.minecraft.item.ItemStack, java.lang.Object[]) */ @Override public void renderItem(ItemRenderType type, ItemStack item, Object... data) { tess.startDrawingQuads(); // adjust rendering space to match what caller expects boolean mustTranslate = false; switch (type) { case EQUIPPED: case EQUIPPED_FIRST_PERSON: { break; // caller expects us to render over [0,0,0] to [1,1,1], no translation necessary } case ENTITY: case INVENTORY: { // translate our coordinates so that [0,0,0] to [1,1,1] translates to the [-0.5, -0.5, -0.5] to [0.5, 0.5, 0.5] expected by the caller. GL11.glTranslatef(-0.5f, -0.5f, -0.5f); mustTranslate = true; // must undo the translation when we're finished rendering break; } default: break; // never here } // xpos face blue IIcon icon = item.getItem().getIconFromDamage(5); tess.setNormal(0.0f, 1.0f, 0.0f); tess.addVertexWithUV(1f - calc, 0.0, calc, (double) icon.getMaxU(), (double) icon.getMaxV()); tess.addVertexWithUV(1f - calc, 1.0, calc, (double) icon.getMaxU(), (double) icon.getMinV()); tess.addVertexWithUV(1f - calc, 1.0, 1f - calc, (double) icon.getMinU(), (double) icon.getMinV()); tess.addVertexWithUV(1f - calc, 0.0, 1f - calc, (double) icon.getMinU(), (double) icon.getMaxV()); if (renderInside) { tess.addVertexWithUV(1f - calc, 0.0, 1f - calc, (double) icon.getMinU(), (double) icon.getMaxV()); tess.addVertexWithUV(1f - calc, 1.0, 1f - calc, (double) icon.getMinU(), (double) icon.getMinV()); tess.addVertexWithUV(1f - calc, 1.0, calc, (double) icon.getMaxU(), (double) icon.getMinV()); tess.addVertexWithUV(1f - calc, 0.0, calc, (double) icon.getMaxU(), (double) icon.getMaxV()); } // xneg face purple icon = item.getItem().getIconFromDamage(4); tess.addVertexWithUV(calc, 0.0, 1f - calc, (double) icon.getMaxU(), (double) icon.getMaxV()); tess.addVertexWithUV(calc, 1.0, 1f - calc, (double) icon.getMaxU(), (double) icon.getMinV()); tess.addVertexWithUV(calc, 1.0, calc, (double) icon.getMinU(), (double) icon.getMinV()); tess.addVertexWithUV(calc, 0.0, calc, (double) icon.getMinU(), (double) icon.getMaxV()); if (renderInside) { tess.addVertexWithUV(calc, 0.0, calc, (double) icon.getMinU(), (double) icon.getMaxV()); tess.addVertexWithUV(calc, 1.0, calc, (double) icon.getMinU(), (double) icon.getMinV()); tess.addVertexWithUV(calc, 1.0, 1f - calc, (double) icon.getMaxU(), (double) icon.getMinV()); tess.addVertexWithUV(calc, 0.0, 1f - calc, (double) icon.getMaxU(), (double) icon.getMaxV()); } // zneg face white icon = item.getItem().getIconFromDamage(2); tess.addVertexWithUV(calc, 0.0, calc, (double) icon.getMaxU(), (double) icon.getMaxV()); tess.addVertexWithUV(calc, 1.0, calc, (double) icon.getMaxU(), (double) icon.getMinV()); tess.addVertexWithUV(1f - calc, 1.0, calc, (double) icon.getMinU(), (double) icon.getMinV()); tess.addVertexWithUV(1f - calc, 0.0, calc, (double) icon.getMinU(), (double) icon.getMaxV()); if (renderInside) { tess.addVertexWithUV(1f - calc, 0.0, calc, (double) icon.getMinU(), (double) icon.getMaxV()); tess.addVertexWithUV(1f - calc, 1.0, calc, (double) icon.getMinU(), (double) icon.getMinV()); tess.addVertexWithUV(calc, 1.0, calc, (double) icon.getMaxU(), (double) icon.getMinV()); tess.addVertexWithUV(calc, 0.0, calc, (double) icon.getMaxU(), (double) icon.getMaxV()); } // zpos face green icon = item.getItem().getIconFromDamage(3); tess.addVertexWithUV(1.0f - calc, 0.0, 1.0 - calc, (double) icon.getMaxU(), (double) icon.getMaxV()); tess.addVertexWithUV(1.0f - calc, 1.0, 1.0 - calc, (double) icon.getMaxU(), (double) icon.getMinV()); tess.addVertexWithUV(calc, 1.0, 1.0f - calc, (double) icon.getMinU(), (double) icon.getMinV()); tess.addVertexWithUV(calc, 0.0, 1.0f - calc, (double) icon.getMinU(), (double) icon.getMaxV()); if (renderInside) { tess.addVertexWithUV(calc, 0.0, 1.0f - calc, (double) icon.getMinU(), (double) icon.getMaxV()); tess.addVertexWithUV(calc, 1.0, 1.0f - calc, (double) icon.getMinU(), (double) icon.getMinV()); tess.addVertexWithUV(1.0f - calc, 1.0, 1.0 - calc, (double) icon.getMaxU(), (double) icon.getMinV()); tess.addVertexWithUV(1.0f - calc, 0.0, 1.0 - calc, (double) icon.getMaxU(), (double) icon.getMaxV()); } // ypos face red icon = item.getItem().getIconFromDamage(1); tess.addVertexWithUV(1.0f - calc, 1.0, 1.0f - calc, (double) icon.getMaxU(), (double) icon.getMaxV()); tess.addVertexWithUV(1.0f - calc, 1.0, calc, (double) icon.getMaxU(), (double) icon.getMinV()); tess.addVertexWithUV(calc, 1.0, calc, (double) icon.getMinU(), (double) icon.getMinV()); tess.addVertexWithUV(calc, 1.0, 1.0f - calc, (double) icon.getMinU(), (double) icon.getMaxV()); if (renderInside) { tess.addVertexWithUV(calc, 1.0, 1.0f - calc, (double) icon.getMinU(), (double) icon.getMaxV()); tess.addVertexWithUV(calc, 1.0, calc, (double) icon.getMinU(), (double) icon.getMinV()); tess.addVertexWithUV(1.0f - calc, 1.0, calc, (double) icon.getMaxU(), (double) icon.getMinV()); tess.addVertexWithUV(1.0f - calc, 1.0, 1.0f - calc, (double) icon.getMaxU(), (double) icon.getMaxV()); } // yneg face yellow icon = item.getItem().getIconFromDamage(0); tess.addVertexWithUV(calc, 0.0, 1.0f - calc, (double) icon.getMaxU(), (double) icon.getMaxV()); tess.addVertexWithUV(calc, 0.0, calc, (double) icon.getMaxU(), (double) icon.getMinV()); tess.addVertexWithUV(1.0f - calc, 0.0, calc, (double) icon.getMinU(), (double) icon.getMinV()); tess.addVertexWithUV(1.0f - calc, 0.0, 1.0f - calc, (double) icon.getMinU(), (double) icon.getMaxV()); if (renderInside) { tess.addVertexWithUV(1.0f - calc, 0.0, 1.0f - calc, (double) icon.getMinU(), (double) icon.getMaxV()); tess.addVertexWithUV(1.0f - calc, 0.0, calc, (double) icon.getMinU(), (double) icon.getMinV()); tess.addVertexWithUV(calc, 0.0, calc, (double) icon.getMaxU(), (double) icon.getMinV()); tess.addVertexWithUV(calc, 0.0, 1.0f - calc, (double) icon.getMaxU(), (double) icon.getMaxV()); } tess.draw(); if (mustTranslate) GL11.glTranslatef(0.5f, 0.5f, 0.5f); } }