Java tutorial
package eplus.renders; import cpw.mods.fml.relauncher.Side; import cpw.mods.fml.relauncher.SideOnly; import net.minecraft.block.Block; import net.minecraft.client.Minecraft; import net.minecraft.client.gui.FontRenderer; import net.minecraft.client.renderer.ItemRenderer; import net.minecraft.client.renderer.RenderBlocks; import net.minecraft.client.renderer.RenderEngine; import net.minecraft.client.renderer.Tessellator; import net.minecraft.client.renderer.entity.Render; import net.minecraft.entity.Entity; import net.minecraft.entity.item.EntityItem; import net.minecraft.item.Item; import net.minecraft.item.ItemStack; import net.minecraft.util.Icon; import net.minecraft.util.MathHelper; import net.minecraftforge.client.ForgeHooksClient; import org.lwjgl.opengl.GL11; import org.lwjgl.opengl.GL12; import java.util.Random; /** * @user odininon * @license Lesser GNU Public License v3 (http://www.gnu.org/licenses/lgpl.html) */ @SideOnly(Side.CLIENT) public class TableEntityItemRenderer extends Render { private RenderBlocks itemRenderBlocks = new RenderBlocks(); /** The RNG used in RenderItem (for bobbing itemstacks on the ground) */ private Random random = new Random(); public boolean renderWithColor = true; /** Defines the zLevel of rendering of item on GUI. */ public float zLevel = 0.0F; public static boolean renderInFrame = false; public TableEntityItemRenderer() { this.shadowSize = 0.15F; this.shadowOpaque = 0.75F; } /** * Renders the item */ public void doRenderItem(EntityItem par1EntityItem, double par2, double par4, double par6, float par8, float par9) { this.random.setSeed(187L); ItemStack itemstack = par1EntityItem.getEntityItem(); if (itemstack.getItem() != null) { GL11.glPushMatrix(); float f2 = shouldBob() ? MathHelper.sin(((float) par1EntityItem.age + par9) / 10.0F + par1EntityItem.hoverStart) * 0.1F + 0.1F : 0F; float f3 = (((float) par1EntityItem.age + par9) / 20.0F + par1EntityItem.hoverStart) * (180F / (float) Math.PI); byte b0 = getMiniBlockCount(itemstack); GL11.glTranslatef((float) par2, (float) par4 + f2, (float) par6); GL11.glEnable(GL12.GL_RESCALE_NORMAL); int i; float f4; float f5; float f6; Block block = null; if (itemstack.itemID < Block.blocksList.length) { block = Block.blocksList[itemstack.itemID]; } if (ForgeHooksClient.renderEntityItem(par1EntityItem, itemstack, f2, f3, random, renderManager.renderEngine, renderBlocks)) { ; } else if (itemstack.getItemSpriteNumber() == 0 && block != null && RenderBlocks.renderItemIn3d(Block.blocksList[itemstack.itemID].getRenderType())) { GL11.glRotatef(f3, 0.0F, 1.0F, 0.0F); if (renderInFrame) { GL11.glScalef(1.25F, 1.25F, 1.25F); GL11.glTranslatef(0.0F, 0.05F, 0.0F); GL11.glRotatef(-90.0F, 0.0F, 1.0F, 0.0F); } this.loadTexture("/terrain.png"); float f7 = 0.25F; int j = block.getRenderType(); if (j == 1 || j == 19 || j == 12 || j == 2) { f7 = 0.5F; } GL11.glScalef(f7, f7, f7); for (i = 0; i < b0; ++i) { GL11.glPushMatrix(); if (i > 0) { f5 = (this.random.nextFloat() * 2.0F - 1.0F) * 0.2F / f7; f4 = (this.random.nextFloat() * 2.0F - 1.0F) * 0.2F / f7; f6 = (this.random.nextFloat() * 2.0F - 1.0F) * 0.2F / f7; GL11.glTranslatef(f5, f4, f6); } f5 = 1.0F; this.itemRenderBlocks.renderBlockAsItem(block, itemstack.getItemDamage(), f5); GL11.glPopMatrix(); } } else { float f8; if (itemstack.getItem().requiresMultipleRenderPasses()) { if (renderInFrame) { GL11.glScalef(0.5128205F, 0.5128205F, 0.5128205F); GL11.glTranslatef(0.0F, -0.05F, 0.0F); } else { GL11.glScalef(0.5F, 0.5F, 0.5F); } this.loadTexture("/gui/items.png"); for (int k = 0; k < itemstack.getItem().getRenderPasses(itemstack.getItemDamage()); ++k) { this.random.setSeed(187L); Icon icon = itemstack.getItem().getIcon(itemstack, k); f8 = 1.0F; if (this.renderWithColor) { i = Item.itemsList[itemstack.itemID].getColorFromItemStack(itemstack, k); f5 = (float) (i >> 16 & 255) / 255.0F; f4 = (float) (i >> 8 & 255) / 255.0F; f6 = (float) (i & 255) / 255.0F; GL11.glColor4f(f5 * f8, f4 * f8, f6 * f8, 1.0F); this.renderDroppedItem(par1EntityItem, icon, b0, par9, f5 * f8, f4 * f8, f6 * f8); } else { this.renderDroppedItem(par1EntityItem, icon, b0, par9, 1.0F, 1.0F, 1.0F); } } } else { if (renderInFrame) { GL11.glScalef(0.5128205F, 0.5128205F, 0.5128205F); GL11.glTranslatef(0.0F, -0.05F, 0.0F); } else { GL11.glScalef(0.5F, 0.5F, 0.5F); } Icon icon1 = itemstack.getIconIndex(); if (itemstack.getItemSpriteNumber() == 0) { this.loadTexture("/terrain.png"); } else { this.loadTexture("/gui/items.png"); } if (this.renderWithColor) { int l = Item.itemsList[itemstack.itemID].getColorFromItemStack(itemstack, 0); f8 = (float) (l >> 16 & 255) / 255.0F; float f9 = (float) (l >> 8 & 255) / 255.0F; f5 = (float) (l & 255) / 255.0F; f4 = 1.0F; this.renderDroppedItem(par1EntityItem, icon1, b0, par9, f8 * f4, f9 * f4, f5 * f4); } else { this.renderDroppedItem(par1EntityItem, icon1, b0, par9, 1.0F, 1.0F, 1.0F); } } } GL11.glDisable(GL12.GL_RESCALE_NORMAL); GL11.glPopMatrix(); } } /** * Renders a dropped item */ private void renderDroppedItem(EntityItem par1EntityItem, Icon par2Icon, int par3, float par4, float par5, float par6, float par7) { Tessellator tessellator = Tessellator.instance; if (par2Icon == null) { par2Icon = this.renderManager.renderEngine .getMissingIcon(par1EntityItem.getEntityItem().getItemSpriteNumber()); } float f4 = par2Icon.getMinU(); float f5 = par2Icon.getMaxU(); float f6 = par2Icon.getMinV(); float f7 = par2Icon.getMaxV(); float f8 = 1.0F; float f9 = 0.5F; float f10 = 0.25F; float f11; GL11.glPushMatrix(); if (renderInFrame) { GL11.glRotatef(180.0F, 0.0F, 1.0F, 0.0F); } else { GL11.glRotatef((((float) par1EntityItem.age + par4) / 20.0F + par1EntityItem.hoverStart) * (180F / (float) Math.PI), 0.0F, 1.0F, 0.0F); } float f12 = 0.0625F; f11 = 0.021875F; ItemStack itemstack = par1EntityItem.getEntityItem(); int j = itemstack.stackSize; byte b0 = getMiniItemCount(itemstack); GL11.glTranslatef(-f9, -f10, -((f12 + f11) * (float) b0 / 2.0F)); for (int k = 0; k < b0; ++k) { GL11.glTranslatef(0.0F, 0.0F, f12 + f11); // Makes items offset when in 3D, like when in 2D, looks much // better. Considered a vanilla bug... if (k > 0 && shouldSpreadItems()) { float x = (random.nextFloat() * 2.0F - 1.0F) * 0.3F / 0.5F; float y = (random.nextFloat() * 2.0F - 1.0F) * 0.3F / 0.5F; float z = (random.nextFloat() * 2.0F - 1.0F) * 0.3F / 0.5F; GL11.glTranslatef(x, y, f12 + f11); } else { GL11.glTranslatef(0f, 0f, f12 + f11); } if (itemstack.getItemSpriteNumber() == 0) { this.loadTexture("/terrain.png"); } else { this.loadTexture("/gui/items.png"); } GL11.glColor4f(par5, par6, par7, 1.0F); ItemRenderer.renderItemIn2D(tessellator, f5, f6, f4, f7, par2Icon.getSheetWidth(), par2Icon.getSheetHeight(), f12); if (itemstack != null && itemstack.hasEffect()) { GL11.glDepthFunc(GL11.GL_EQUAL); GL11.glDisable(GL11.GL_LIGHTING); this.renderManager.renderEngine.bindTexture("%blur%/misc/glint.png"); GL11.glEnable(GL11.GL_BLEND); GL11.glBlendFunc(GL11.GL_SRC_COLOR, GL11.GL_ONE); float f13 = 0.76F; GL11.glColor4f(0.5F * f13, 0.25F * f13, 0.8F * f13, 1.0F); GL11.glMatrixMode(GL11.GL_TEXTURE); GL11.glPushMatrix(); float f14 = 0.125F; GL11.glScalef(f14, f14, f14); float f15 = (float) (Minecraft.getSystemTime() % 3000L) / 3000.0F * 8.0F; GL11.glTranslatef(f15, 0.0F, 0.0F); GL11.glRotatef(-50.0F, 0.0F, 0.0F, 1.0F); ItemRenderer.renderItemIn2D(tessellator, 0.0F, 0.0F, 1.0F, 1.0F, 255, 255, f12); GL11.glPopMatrix(); GL11.glPushMatrix(); GL11.glScalef(f14, f14, f14); f15 = (float) (Minecraft.getSystemTime() % 4873L) / 4873.0F * 8.0F; GL11.glTranslatef(-f15, 0.0F, 0.0F); GL11.glRotatef(10.0F, 0.0F, 0.0F, 1.0F); ItemRenderer.renderItemIn2D(tessellator, 0.0F, 0.0F, 1.0F, 1.0F, 255, 255, f12); GL11.glPopMatrix(); GL11.glMatrixMode(GL11.GL_MODELVIEW); GL11.glDisable(GL11.GL_BLEND); GL11.glEnable(GL11.GL_LIGHTING); GL11.glDepthFunc(GL11.GL_LEQUAL); } } GL11.glPopMatrix(); } /** * Renders the item's icon or block into the UI at the specified position. */ public void renderItemIntoGUI(FontRenderer par1FontRenderer, RenderEngine par2RenderEngine, ItemStack par3ItemStack, int par4, int par5) { int k = par3ItemStack.itemID; int l = par3ItemStack.getItemDamage(); Icon icon = par3ItemStack.getIconIndex(); float f; float f1; float f2; Block block = (k < Block.blocksList.length ? Block.blocksList[k] : null); if (par3ItemStack.getItemSpriteNumber() == 0 && block != null && RenderBlocks.renderItemIn3d(Block.blocksList[k].getRenderType())) { par2RenderEngine.bindTexture("/terrain.png"); GL11.glPushMatrix(); GL11.glTranslatef((float) (par4 - 2), (float) (par5 + 3), -3.0F + this.zLevel); GL11.glScalef(10.0F, 10.0F, 10.0F); GL11.glTranslatef(1.0F, 0.5F, 1.0F); GL11.glScalef(1.0F, 1.0F, -1.0F); GL11.glRotatef(210.0F, 1.0F, 0.0F, 0.0F); GL11.glRotatef(45.0F, 0.0F, 1.0F, 0.0F); int i1 = Item.itemsList[k].getColorFromItemStack(par3ItemStack, 0); f2 = (float) (i1 >> 16 & 255) / 255.0F; f = (float) (i1 >> 8 & 255) / 255.0F; f1 = (float) (i1 & 255) / 255.0F; if (this.renderWithColor) { GL11.glColor4f(f2, f, f1, 1.0F); } GL11.glRotatef(-90.0F, 0.0F, 1.0F, 0.0F); this.itemRenderBlocks.useInventoryTint = this.renderWithColor; this.itemRenderBlocks.renderBlockAsItem(block, l, 1.0F); this.itemRenderBlocks.useInventoryTint = true; GL11.glPopMatrix(); } else { int j1; if (Item.itemsList[k].requiresMultipleRenderPasses()) { GL11.glDisable(GL11.GL_LIGHTING); par2RenderEngine .bindTexture(par3ItemStack.getItemSpriteNumber() == 0 ? "/terrain.png" : "/gui/items.png"); for (j1 = 0; j1 < Item.itemsList[k].getRenderPasses(l); ++j1) { Icon icon1 = Item.itemsList[k].getIcon(par3ItemStack, j1); int k1 = Item.itemsList[k].getColorFromItemStack(par3ItemStack, j1); f = (float) (k1 >> 16 & 255) / 255.0F; f1 = (float) (k1 >> 8 & 255) / 255.0F; float f3 = (float) (k1 & 255) / 255.0F; if (this.renderWithColor) { GL11.glColor4f(f, f1, f3, 1.0F); } this.renderIcon(par4, par5, icon1, 16, 16); } GL11.glEnable(GL11.GL_LIGHTING); } else { GL11.glDisable(GL11.GL_LIGHTING); if (par3ItemStack.getItemSpriteNumber() == 0) { par2RenderEngine.bindTexture("/terrain.png"); } else { par2RenderEngine.bindTexture("/gui/items.png"); } if (icon == null) { icon = par2RenderEngine.getMissingIcon(par3ItemStack.getItemSpriteNumber()); } j1 = Item.itemsList[k].getColorFromItemStack(par3ItemStack, 0); float f4 = (float) (j1 >> 16 & 255) / 255.0F; f2 = (float) (j1 >> 8 & 255) / 255.0F; f = (float) (j1 & 255) / 255.0F; if (this.renderWithColor) { GL11.glColor4f(f4, f2, f, 1.0F); } this.renderIcon(par4, par5, icon, 16, 16); GL11.glEnable(GL11.GL_LIGHTING); } } GL11.glEnable(GL11.GL_CULL_FACE); } /** * Render the item's icon or block into the GUI, including the glint effect. */ public void renderItemAndEffectIntoGUI(FontRenderer par1FontRenderer, RenderEngine par2RenderEngine, ItemStack par3ItemStack, int par4, int par5) { if (par3ItemStack != null) { if (!ForgeHooksClient.renderInventoryItem(renderBlocks, par2RenderEngine, par3ItemStack, renderWithColor, zLevel, (float) par4, (float) par5)) { this.renderItemIntoGUI(par1FontRenderer, par2RenderEngine, par3ItemStack, par4, par5); } if (par3ItemStack.hasEffect()) { GL11.glDepthFunc(GL11.GL_GREATER); GL11.glDisable(GL11.GL_LIGHTING); GL11.glDepthMask(false); par2RenderEngine.bindTexture("%blur%/misc/glint.png"); this.zLevel -= 50.0F; GL11.glEnable(GL11.GL_BLEND); GL11.glBlendFunc(GL11.GL_DST_COLOR, GL11.GL_DST_COLOR); GL11.glColor4f(0.5F, 0.25F, 0.8F, 1.0F); this.renderGlint(par4 * 431278612 + par5 * 32178161, par4 - 2, par5 - 2, 20, 20); GL11.glDisable(GL11.GL_BLEND); GL11.glDepthMask(true); this.zLevel += 50.0F; GL11.glEnable(GL11.GL_LIGHTING); GL11.glDepthFunc(GL11.GL_LEQUAL); } } } private void renderGlint(int par1, int par2, int par3, int par4, int par5) { for (int j1 = 0; j1 < 2; ++j1) { if (j1 == 0) { GL11.glBlendFunc(GL11.GL_SRC_COLOR, GL11.GL_ONE); } if (j1 == 1) { GL11.glBlendFunc(GL11.GL_SRC_COLOR, GL11.GL_ONE); } float f = 0.00390625F; float f1 = 0.00390625F; float f2 = (float) (Minecraft.getSystemTime() % (long) (3000 + j1 * 1873)) / (3000.0F + (float) (j1 * 1873)) * 256.0F; float f3 = 0.0F; Tessellator tessellator = Tessellator.instance; float f4 = 4.0F; if (j1 == 1) { f4 = -1.0F; } tessellator.startDrawingQuads(); tessellator.addVertexWithUV((double) (par2 + 0), (double) (par3 + par5), (double) this.zLevel, (double) ((f2 + (float) par5 * f4) * f), (double) ((f3 + (float) par5) * f1)); tessellator.addVertexWithUV((double) (par2 + par4), (double) (par3 + par5), (double) this.zLevel, (double) ((f2 + (float) par4 + (float) par5 * f4) * f), (double) ((f3 + (float) par5) * f1)); tessellator.addVertexWithUV((double) (par2 + par4), (double) (par3 + 0), (double) this.zLevel, (double) ((f2 + (float) par4) * f), (double) ((f3 + 0.0F) * f1)); tessellator.addVertexWithUV((double) (par2 + 0), (double) (par3 + 0), (double) this.zLevel, (double) ((f2 + 0.0F) * f), (double) ((f3 + 0.0F) * f1)); tessellator.draw(); } } /** * Renders the item's overlay information. Examples being stack count or * damage on top of the item's image at the specified position. */ public void renderItemOverlayIntoGUI(FontRenderer par1FontRenderer, RenderEngine par2RenderEngine, ItemStack par3ItemStack, int par4, int par5) { this.renderItemStack(par1FontRenderer, par2RenderEngine, par3ItemStack, par4, par5, (String) null); } public void renderItemStack(FontRenderer par1FontRenderer, RenderEngine par2RenderEngine, ItemStack par3ItemStack, int par4, int par5, String par6Str) { if (par3ItemStack != null) { if (par3ItemStack.stackSize > 1 || par6Str != null) { String s1 = par6Str == null ? String.valueOf(par3ItemStack.stackSize) : par6Str; GL11.glDisable(GL11.GL_LIGHTING); GL11.glDisable(GL11.GL_DEPTH_TEST); par1FontRenderer.drawStringWithShadow(s1, par4 + 19 - 2 - par1FontRenderer.getStringWidth(s1), par5 + 6 + 3, 16777215); GL11.glEnable(GL11.GL_LIGHTING); GL11.glEnable(GL11.GL_DEPTH_TEST); } if (par3ItemStack.isItemDamaged()) { int k = (int) Math.round(13.0D - (double) par3ItemStack.getItemDamageForDisplay() * 13.0D / (double) par3ItemStack.getMaxDamage()); int l = (int) Math.round(255.0D - (double) par3ItemStack.getItemDamageForDisplay() * 255.0D / (double) par3ItemStack.getMaxDamage()); GL11.glDisable(GL11.GL_LIGHTING); GL11.glDisable(GL11.GL_DEPTH_TEST); GL11.glDisable(GL11.GL_TEXTURE_2D); Tessellator tessellator = Tessellator.instance; int i1 = 255 - l << 16 | l << 8; int j1 = (255 - l) / 4 << 16 | 16128; this.renderQuad(tessellator, par4 + 2, par5 + 13, 13, 2, 0); this.renderQuad(tessellator, par4 + 2, par5 + 13, 12, 1, j1); this.renderQuad(tessellator, par4 + 2, par5 + 13, k, 1, i1); GL11.glEnable(GL11.GL_TEXTURE_2D); GL11.glEnable(GL11.GL_LIGHTING); GL11.glEnable(GL11.GL_DEPTH_TEST); GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F); } } } /** * Adds a quad to the tesselator at the specified position with the set * width and height and color. Args: tessellator, x, y, width, height, color */ private void renderQuad(Tessellator par1Tessellator, int par2, int par3, int par4, int par5, int par6) { par1Tessellator.startDrawingQuads(); par1Tessellator.setColorOpaque_I(par6); par1Tessellator.addVertex((double) (par2 + 0), (double) (par3 + 0), 0.0D); par1Tessellator.addVertex((double) (par2 + 0), (double) (par3 + par5), 0.0D); par1Tessellator.addVertex((double) (par2 + par4), (double) (par3 + par5), 0.0D); par1Tessellator.addVertex((double) (par2 + par4), (double) (par3 + 0), 0.0D); par1Tessellator.draw(); } public void renderIcon(int par1, int par2, Icon par3Icon, int par4, int par5) { Tessellator tessellator = Tessellator.instance; tessellator.startDrawingQuads(); tessellator.addVertexWithUV((double) (par1 + 0), (double) (par2 + par5), (double) this.zLevel, (double) par3Icon.getMinU(), (double) par3Icon.getMaxV()); tessellator.addVertexWithUV((double) (par1 + par4), (double) (par2 + par5), (double) this.zLevel, (double) par3Icon.getMaxU(), (double) par3Icon.getMaxV()); tessellator.addVertexWithUV((double) (par1 + par4), (double) (par2 + 0), (double) this.zLevel, (double) par3Icon.getMaxU(), (double) par3Icon.getMinV()); tessellator.addVertexWithUV((double) (par1 + 0), (double) (par2 + 0), (double) this.zLevel, (double) par3Icon.getMinU(), (double) par3Icon.getMinV()); tessellator.draw(); } /** * Actually renders the given argument. This is a synthetic bridge method, * always casting down its argument and then handing it off to a worker * function which does the actual work. In all probabilty, the class Render * is generic (Render<T extends Entity) and this method has signature public * void doRender(T entity, double d, double d1, double d2, float f, float * f1). But JAD is pre 1.5 so doesn't do that. */ public void doRender(Entity par1Entity, double par2, double par4, double par6, float par8, float par9) { this.doRenderItem((EntityItem) par1Entity, par2, par4, par6, par8, par9); } /** * Items should spread out when rendered in 3d? * * @return */ public boolean shouldSpreadItems() { return true; } /** * Items should have a bob effect * * @return */ public boolean shouldBob() { return true; } public byte getMiniBlockCount(ItemStack stack) { byte ret = 1; if (stack.stackSize > 1) ret = 2; if (stack.stackSize > 5) ret = 3; if (stack.stackSize > 20) ret = 4; if (stack.stackSize > 40) ret = 5; return ret; } /** * Allows for a subclass to override how many rendered items appear in a * "mini item 3d stack" * * @param stack * @return */ public byte getMiniItemCount(ItemStack stack) { byte ret = 1; if (stack.stackSize > 1) ret = 2; if (stack.stackSize > 15) ret = 3; if (stack.stackSize > 31) ret = 4; return ret; } }