common/calclavia/lib/render/CalclaviaRenderHelper.java

package calclavia.lib.render;

import static org.lwjgl.opengl.GL11.GL_BLEND;
import static org.lwjgl.opengl.GL11.GL_FLAT;
import static org.lwjgl.opengl.GL11.GL_LINE_SMOOTH;
import static org.lwjgl.opengl.GL11.GL_ONE_MINUS_SRC_ALPHA;
import static org.lwjgl.opengl.GL11.GL_POLYGON_SMOOTH;
import static org.lwjgl.opengl.GL11.GL_SMOOTH;
import static org.lwjgl.opengl.GL11.GL_SRC_ALPHA;
import static org.lwjgl.opengl.GL11.glBlendFunc;
import static org.lwjgl.opengl.GL11.glDisable;
import static org.lwjgl.opengl.GL11.glEnable;
import static org.lwjgl.opengl.GL11.glRotatef;
import static org.lwjgl.opengl.GL11.glShadeModel;
import static org.lwjgl.opengl.GL11.glTranslatef;
import net.minecraft.block.Block;
import net.minecraft.client.gui.FontRenderer;
import net.minecraft.client.renderer.OpenGlHelper;
import net.minecraft.client.renderer.RenderBlocks;
import net.minecraft.client.renderer.RenderHelper;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.client.renderer.entity.RenderManager;
import net.minecraft.item.ItemStack;
import net.minecraft.util.ResourceLocation;

import org.lwjgl.opengl.GL11;

import cpw.mods.fml.client.FMLClientHandler;

public class CalclaviaRenderHelper
{
	public static final ResourceLocation PARTICLE_RESOURCE = new ResourceLocation("textures/particle/particles.png");

	public static void setTerrainTexture()
	{
		setSpriteTexture(0);
	}

	public static void setSpriteTexture(ItemStack itemStack)
	{
		setSpriteTexture(itemStack.getItemSpriteNumber());
	}

	public static void setSpriteTexture(int sprite)
	{
		FMLClientHandler.instance().getClient().renderEngine.bindTexture(FMLClientHandler.instance().getClient().renderEngine.getResourceLocation(sprite));
	}

	/**
	 * Enables blending.
	 */
	public static void enableBlending()
	{
		glShadeModel(GL_SMOOTH);
		glEnable(GL_BLEND);
		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	}

	/**
	 * Disables blending.
	 */
	public static void disableBlending()
	{
		glShadeModel(GL_FLAT);
		glDisable(GL_LINE_SMOOTH);
		glDisable(GL_POLYGON_SMOOTH);
		glDisable(GL_BLEND);
	}

	public static void enableLighting()
	{
		RenderHelper.enableStandardItemLighting();
	}

	/**
	 * Disables lighting and turns glow on.
	 */
	public static void disableLighting()
	{
		RenderHelper.disableStandardItemLighting();
		OpenGlHelper.setLightmapTextureCoords(OpenGlHelper.lightmapTexUnit, 240.0F, 240.0F);
	}

	public static void renderNormalBlockAsItem(Block block, int metadata, RenderBlocks renderer)
	{
		Tessellator tessellator = Tessellator.instance;

		block.setBlockBoundsForItemRender();
		renderer.setRenderBoundsFromBlock(block);
		glRotatef(90.0F, 0.0F, 1.0F, 0.0F);
		glTranslatef(-0.5F, -0.5F, -0.5F);
		tessellator.startDrawingQuads();
		tessellator.setNormal(0.0F, -1.0F, 0.0F);
		renderer.renderFaceYNeg(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 0, metadata));
		tessellator.draw();

		tessellator.startDrawingQuads();
		tessellator.setNormal(0.0F, 1.0F, 0.0F);
		renderer.renderFaceYPos(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 1, metadata));
		tessellator.draw();

		tessellator.startDrawingQuads();
		tessellator.setNormal(0.0F, 0.0F, -1.0F);
		renderer.renderFaceZNeg(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 2, metadata));
		tessellator.draw();
		tessellator.startDrawingQuads();
		tessellator.setNormal(0.0F, 0.0F, 1.0F);
		renderer.renderFaceZPos(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 3, metadata));
		tessellator.draw();
		tessellator.startDrawingQuads();
		tessellator.setNormal(-1.0F, 0.0F, 0.0F);
		renderer.renderFaceXNeg(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 4, metadata));
		tessellator.draw();
		tessellator.startDrawingQuads();
		tessellator.setNormal(1.0F, 0.0F, 0.0F);
		renderer.renderFaceXPos(block, 0.0D, 0.0D, 0.0D, renderer.getBlockIconFromSideAndMetadata(block, 5, metadata));
		tessellator.draw();
		glTranslatef(0.5F, 0.5F, 0.5F);
	}

	public static void renderFloatingText(String text, float x, float y, float z)
	{
		renderFloatingText(text, x, y, z, 0xFFFFFF);
	}

	/**
	 * Renders a floating text in a specific position.
	 * 
	 * @author Briman0094
	 * 
	 */
	public static void renderFloatingText(String text, float x, float y, float z, int color)
	{
		RenderManager renderManager = RenderManager.instance;
		FontRenderer fontRenderer = renderManager.getFontRenderer();
		float scale = 0.027f;
		GL11.glColor4f(1f, 1f, 1f, 0.5f);
		GL11.glPushMatrix();
		GL11.glTranslatef(x + 0.0F, y + 2.3F, z);
		GL11.glNormal3f(0.0F, 1.0F, 0.0F);
		GL11.glRotatef(-renderManager.playerViewY, 0.0F, 1.0F, 0.0F);
		GL11.glRotatef(renderManager.playerViewX, 1.0F, 0.0F, 0.0F);
		GL11.glScalef(-scale, -scale, scale);
		GL11.glDisable(GL11.GL_LIGHTING);
		GL11.glDepthMask(false);
		GL11.glDisable(GL11.GL_DEPTH_TEST);
		GL11.glEnable(GL11.GL_BLEND);
		GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
		Tessellator tessellator = Tessellator.instance;
		int yOffset = 0;

		GL11.glDisable(GL11.GL_TEXTURE_2D);
		tessellator.startDrawingQuads();
		int stringMiddle = fontRenderer.getStringWidth(text) / 2;
		tessellator.setColorRGBA_F(0.0F, 0.0F, 0.0F, 0.5F);
		tessellator.addVertex(-stringMiddle - 1, -1 + yOffset, 0.0D);
		tessellator.addVertex(-stringMiddle - 1, 8 + yOffset, 0.0D);
		tessellator.addVertex(stringMiddle + 1, 8 + yOffset, 0.0D);
		tessellator.addVertex(stringMiddle + 1, -1 + yOffset, 0.0D);
		tessellator.draw();
		GL11.glEnable(GL11.GL_TEXTURE_2D);
		GL11.glColor4f(1f, 1f, 1f, 0.5f);
		fontRenderer.drawString(text, -fontRenderer.getStringWidth(text) / 2, yOffset, color);
		GL11.glEnable(GL11.GL_DEPTH_TEST);
		GL11.glDepthMask(true);
		fontRenderer.drawString(text, -fontRenderer.getStringWidth(text) / 2, yOffset, color);
		GL11.glEnable(GL11.GL_LIGHTING);
		GL11.glDisable(GL11.GL_BLEND);
		GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
		GL11.glPopMatrix();
	}

}