DimDoors/StevenDimDoors/mod_pocketDim/world/CustomSkyProvider.java

package StevenDimDoors.mod_pocketDim.world;

import org.lwjgl.opengl.GL11;

import net.minecraft.client.Minecraft;
import net.minecraft.client.multiplayer.WorldClient;
import net.minecraft.client.renderer.GLAllocation;
import net.minecraft.client.renderer.RenderHelper;
import net.minecraft.client.renderer.Tessellator;
import net.minecraft.util.MathHelper;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.Vec3;
import net.minecraftforge.client.IRenderHandler;

public class CustomSkyProvider extends IRenderHandler
{

	int starGLCallList;
	int glSkyList;
	int glSkyList2;


	public ResourceLocation getMoonRenderPath()
	{
		return null;
	}

	public ResourceLocation getSunRenderPath()
	{
		return null;
	}


	@Override
	public void render(float par1, WorldClient world, Minecraft mc) 
	{

		starGLCallList = GLAllocation.generateDisplayLists(3);
		glSkyList = this.starGLCallList + 1;
		glSkyList2 = this.starGLCallList + 2;
		GL11.glDisable(GL11.GL_FOG);
		GL11.glDisable(GL11.GL_ALPHA_TEST);
		GL11.glEnable(GL11.GL_BLEND);
		GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
		RenderHelper.disableStandardItemLighting();
		GL11.glDepthMask(false);
		mc.renderEngine.bindTexture(new ResourceLocation("/misc/tunnel.png"));

		if (mc.theWorld.provider.isSurfaceWorld())
		{
			GL11.glDisable(GL11.GL_TEXTURE_2D);
			Vec3 vec3 = world.getSkyColor(mc.renderViewEntity, par1);
			float f1 = (float)vec3.xCoord;
			float f2 = (float)vec3.yCoord;
			float f3 = (float)vec3.zCoord;
			float f4;

			if (mc.gameSettings.anaglyph)
			{
				float f5 = (f1 * 30.0F + f2 * 59.0F + f3 * 11.0F) / 100.0F;
				float f6 = (f1 * 30.0F + f2 * 70.0F) / 100.0F;
				f4 = (f1 * 30.0F + f3 * 70.0F) / 100.0F;
				f1 = f5;
				f2 = f6;
				f3 = f4;
			}

			GL11.glColor3f(f1, f2, f3);
			Tessellator tessellator1 = Tessellator.instance;
			GL11.glDepthMask(false);
			GL11.glEnable(GL11.GL_FOG);
			GL11.glColor3f(f1, f2, f3);
			GL11.glCallList(this.glSkyList);
			GL11.glDisable(GL11.GL_FOG);
			GL11.glDisable(GL11.GL_ALPHA_TEST);
			GL11.glEnable(GL11.GL_BLEND);
			GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
			RenderHelper.disableStandardItemLighting();
			float[] afloat = world.provider.calcSunriseSunsetColors(world.getCelestialAngle(par1), par1);
			float f7;
			float f8;
			float f9;
			float f10;

			if (afloat != null)
			{
				GL11.glDisable(GL11.GL_TEXTURE_2D);
				GL11.glShadeModel(GL11.GL_SMOOTH);
				GL11.glPushMatrix();
				GL11.glRotatef(90.0F, 1.0F, 0.0F, 0.0F);
				GL11.glRotatef(MathHelper.sin(world.getCelestialAngleRadians(par1)) < 0.0F ? 180.0F : 0.0F, 0.0F, 0.0F, 1.0F);
				GL11.glRotatef(90.0F, 0.0F, 0.0F, 1.0F);
				f4 = afloat[0];
				f7 = afloat[1];
				f8 = afloat[2];
				float f11;

				if (mc.gameSettings.anaglyph)
				{
					f9 = (f4 * 30.0F + f7 * 59.0F + f8 * 11.0F) / 100.0F;
					f10 = (f4 * 30.0F + f7 * 70.0F) / 100.0F;
					f11 = (f4 * 30.0F + f8 * 70.0F) / 100.0F;
					f4 = f9;
					f7 = f10;
					f8 = f11;
				}

				tessellator1.startDrawing(6);
				tessellator1.setColorRGBA_F(f4, f7, f8, afloat[3]);
				tessellator1.addVertex(0.0D, 100.0D, 0.0D);
				byte b0 = 16;
				tessellator1.setColorRGBA_F(afloat[0], afloat[1], afloat[2], 0.0F);

				for (int j = 0; j <= b0; ++j)
				{
					f11 = j * (float)Math.PI * 2.0F / b0;
					float f12 = MathHelper.sin(f11);
					float f13 = MathHelper.cos(f11);
					tessellator1.addVertex(f12 * 120.0F, f13 * 120.0F, -f13 * 40.0F * afloat[3]);
				}

				tessellator1.draw();
				GL11.glPopMatrix();
				GL11.glShadeModel(GL11.GL_FLAT);
			}

			GL11.glEnable(GL11.GL_TEXTURE_2D);
			GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE);
			GL11.glPushMatrix();
			f4 = 1.0F - world.getRainStrength(par1);
			f7 = 0.0F;
			f8 = 0.0F;
			f9 = 0.0F;
			GL11.glColor4f(1.0F, 1.0F, 1.0F, f4);
			GL11.glTranslatef(f7, f8, f9);
			GL11.glRotatef(-90.0F, 0.0F, 1.0F, 0.0F);
			GL11.glRotatef(world.getCelestialAngle(par1) * 360.0F, 1.0F, 0.0F, 0.0F);
			f10 = 30.0F;
			mc.renderEngine.bindTexture(this.getSunRenderPath());
			tessellator1.startDrawingQuads();
			tessellator1.addVertexWithUV((-f10), 100.0D, (-f10), 0.0D, 0.0D);
			tessellator1.addVertexWithUV(f10, 100.0D, (-f10), 1.0D, 0.0D);
			tessellator1.addVertexWithUV(f10, 100.0D, f10, 1.0D, 1.0D);
			tessellator1.addVertexWithUV((-f10), 100.0D, f10, 0.0D, 1.0D);
			tessellator1.draw();
			f10 = 20.0F;
			mc.renderEngine.bindTexture(this.getMoonRenderPath());
			int k = world.getMoonPhase();
			int l = k % 4;
			int i1 = k / 4 % 2;
			float f14 = l + 0 ;
			float f15 = i1 + 0;
			float f16 = l + 1 ;
			float f17 = i1 + 1;
			tessellator1.startDrawingQuads();
			tessellator1.addVertexWithUV((-f10), -100.0D, f10, f16, f17);
			tessellator1.addVertexWithUV(f10, -100.0D, f10, f14, f17);
			tessellator1.addVertexWithUV(f10, -100.0D, (-f10), f14, f15);
			tessellator1.addVertexWithUV((-f10), -100.0D, (-f10), f16, f15);
			tessellator1.draw();
			GL11.glDisable(GL11.GL_TEXTURE_2D);
			float f18 = world.getStarBrightness(par1) * f4;

			if (f18 > 0.0F)
			{
				GL11.glColor4f(f18, f18, f18, f18);
				GL11.glCallList(this.starGLCallList);
			}

			GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F);
			GL11.glDisable(GL11.GL_BLEND);
			GL11.glEnable(GL11.GL_ALPHA_TEST);
			GL11.glEnable(GL11.GL_FOG);
			GL11.glPopMatrix();
			GL11.glDisable(GL11.GL_TEXTURE_2D);
			GL11.glColor3f(0.0F, 0.0F, 0.0F);
			double d0 = mc.thePlayer.getPosition(par1).yCoord - world.getHorizon();

			if (d0 < 0.0D)
			{
				GL11.glPushMatrix();
				GL11.glTranslatef(0.0F, 12.0F, 0.0F);
				GL11.glCallList(this.glSkyList2);
				GL11.glPopMatrix();
				f8 = 1.0F;
				f9 = -((float)(d0 + 65.0D));
				f10 = -f8;
				tessellator1.startDrawingQuads();
				tessellator1.setColorRGBA_I(0, 255);
				tessellator1.addVertex((-f8), f9, f8);
				tessellator1.addVertex(f8, f9, f8);
				tessellator1.addVertex(f8, f10, f8);
				tessellator1.addVertex((-f8), f10, f8);
				tessellator1.addVertex((-f8), f10, (-f8));
				tessellator1.addVertex(f8, f10, (-f8));
				tessellator1.addVertex(f8, f9, (-f8));
				tessellator1.addVertex((-f8), f9, (-f8));
				tessellator1.addVertex(f8, f10, (-f8));
				tessellator1.addVertex(f8, f10, f8);
				tessellator1.addVertex(f8, f9, f8);
				tessellator1.addVertex(f8, f9, (-f8));
				tessellator1.addVertex((-f8), f9, (-f8));
				tessellator1.addVertex((-f8), f9, f8);
				tessellator1.addVertex((-f8), f10, f8);
				tessellator1.addVertex((-f8), f10, (-f8));
				tessellator1.addVertex((-f8), f10, (-f8));
				tessellator1.addVertex((-f8), f10, f8);
				tessellator1.addVertex(f8, f10, f8);
				tessellator1.addVertex(f8, f10, (-f8));
				tessellator1.draw();
			}

			if (world.provider.isSkyColored())
			{
				GL11.glColor3f(f1 * 0.2F + 0.04F, f2 * 0.2F + 0.04F, f3 * 0.6F + 0.1F);
			}
			else
			{
				GL11.glColor3f(f1, f2, f3);
			}

			GL11.glPushMatrix();
			GL11.glTranslatef(0.0F, -((float)(d0 - 16.0D)), 0.0F);
			GL11.glCallList(this.glSkyList2);
			GL11.glPopMatrix();
			GL11.glEnable(GL11.GL_TEXTURE_2D);
			GL11.glDepthMask(true);
		}

	}

}