Java tutorial
/** * This class was created by <Vazkii>. It's distributed as * part of the Botania Mod. Get the Source Code in github: * https://github.com/Vazkii/Botania * * Botania is Open Source and distributed under the * Botania License: http://botaniamod.net/license.php * * File Created @ [Aug 8, 2014, 2:38:15 PM (GMT)] */ package vazkii.botania.client.render.tile; import java.awt.Color; import java.nio.FloatBuffer; import java.util.Random; import net.minecraft.client.Minecraft; import net.minecraft.client.renderer.ActiveRenderInfo; import net.minecraft.client.renderer.GLAllocation; import net.minecraft.client.renderer.Tessellator; import net.minecraft.client.renderer.tileentity.TileEntitySpecialRenderer; import net.minecraft.tileentity.TileEntity; import net.minecraft.util.ResourceLocation; import org.lwjgl.opengl.GL11; // THIS CODE WAS STOLEN FROM THE END PORTAL // OH GOD // I HAVE NO IDEA WHAT I'M DOING // SO MUCH STUFF I DON'T UNDERSTAND D: // HELP public class RenderTileStarfield extends TileEntitySpecialRenderer { private static final ResourceLocation field_147529_c = new ResourceLocation("textures/environment/end_sky.png"); private static final ResourceLocation field_147526_d = new ResourceLocation("textures/entity/end_portal.png"); private static final Random field_147527_e = new Random(31100L); FloatBuffer field_147528_b = GLAllocation.createDirectFloatBuffer(16); @Override public void renderTileEntityAt(TileEntity p_147500_1_, double p_147500_2_, double p_147500_4_, double p_147500_6_, float p_147500_8_) { float f1 = (float) field_147501_a.field_147560_j; float f2 = (float) field_147501_a.field_147561_k; float f3 = (float) field_147501_a.field_147558_l; GL11.glDisable(GL11.GL_LIGHTING); field_147527_e.setSeed(31100L); float f4 = 0.24F; for (int i = 0; i < 16; ++i) { GL11.glPushMatrix(); float f5 = 16 - i; float f6 = 0.0625F; float f7 = 1.0F / (f5 + 1.0F); if (i == 0) { bindTexture(field_147529_c); f7 = 0.1F; f5 = 65.0F; f6 = 0.125F; GL11.glEnable(GL11.GL_BLEND); GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA); } if (i == 1) { bindTexture(field_147526_d); GL11.glEnable(GL11.GL_BLEND); GL11.glBlendFunc(GL11.GL_ONE, GL11.GL_ONE); f6 = 0.5F; } float f8 = (float) -(p_147500_4_ + f4); float f9 = f8 + ActiveRenderInfo.objectY; float f10 = f8 + f5 + ActiveRenderInfo.objectY; float f11 = f9 / f10; f11 += (float) (p_147500_4_ + f4); GL11.glTranslatef(f1, f11, f3); GL11.glTexGeni(GL11.GL_S, GL11.GL_TEXTURE_GEN_MODE, GL11.GL_OBJECT_LINEAR); GL11.glTexGeni(GL11.GL_T, GL11.GL_TEXTURE_GEN_MODE, GL11.GL_OBJECT_LINEAR); GL11.glTexGeni(GL11.GL_R, GL11.GL_TEXTURE_GEN_MODE, GL11.GL_OBJECT_LINEAR); GL11.glTexGeni(GL11.GL_Q, GL11.GL_TEXTURE_GEN_MODE, GL11.GL_EYE_LINEAR); GL11.glTexGen(GL11.GL_S, GL11.GL_OBJECT_PLANE, func_147525_a(1.0F, 0.0F, 0.0F, 0.0F)); GL11.glTexGen(GL11.GL_T, GL11.GL_OBJECT_PLANE, func_147525_a(0.0F, 0.0F, 1.0F, 0.0F)); GL11.glTexGen(GL11.GL_R, GL11.GL_OBJECT_PLANE, func_147525_a(0.0F, 0.0F, 0.0F, 1.0F)); GL11.glTexGen(GL11.GL_Q, GL11.GL_EYE_PLANE, func_147525_a(0.0F, 1.0F, 0.0F, 0.0F)); GL11.glEnable(GL11.GL_TEXTURE_GEN_S); GL11.glEnable(GL11.GL_TEXTURE_GEN_T); GL11.glEnable(GL11.GL_TEXTURE_GEN_R); GL11.glEnable(GL11.GL_TEXTURE_GEN_Q); GL11.glPopMatrix(); GL11.glMatrixMode(GL11.GL_TEXTURE); GL11.glPushMatrix(); GL11.glLoadIdentity(); GL11.glTranslatef(0.0F, Minecraft.getSystemTime() % 20000L / 20000.0F, 0.0F); GL11.glScalef(f6, f6, f6); GL11.glTranslatef(0.5F, 0.5F, 0.0F); GL11.glRotatef((i * i * 4321 + i * 9) * 2.0F, 0.0F, 0.0F, 1.0F); GL11.glTranslatef(-0.5F, -0.5F, 0.0F); GL11.glTranslatef(-f1, -f3, -f2); f9 = f8 + ActiveRenderInfo.objectY; GL11.glTranslatef(ActiveRenderInfo.objectX * f5 / f9, ActiveRenderInfo.objectZ * f5 / f9, -f2); Tessellator tessellator = Tessellator.instance; tessellator.startDrawingQuads(); Color color = Color.getHSBColor(Minecraft.getSystemTime() / 20F % 360 / 360F, 1F, 1F); f11 = color.getRed() / 255F; float f12 = color.getGreen() / 255F; float f13 = color.getBlue() / 255F; tessellator.setColorRGBA_F(f11 * f7, f12 * f7, f13 * f7, 1.0F); tessellator.addVertex(p_147500_2_, p_147500_4_ + f4, p_147500_6_); tessellator.addVertex(p_147500_2_, p_147500_4_ + f4, p_147500_6_ + 1.0D); tessellator.addVertex(p_147500_2_ + 1.0D, p_147500_4_ + f4, p_147500_6_ + 1.0D); tessellator.addVertex(p_147500_2_ + 1.0D, p_147500_4_ + f4, p_147500_6_); tessellator.draw(); GL11.glPopMatrix(); GL11.glMatrixMode(GL11.GL_MODELVIEW); } GL11.glDisable(GL11.GL_BLEND); GL11.glDisable(GL11.GL_TEXTURE_GEN_S); GL11.glDisable(GL11.GL_TEXTURE_GEN_T); GL11.glDisable(GL11.GL_TEXTURE_GEN_R); GL11.glDisable(GL11.GL_TEXTURE_GEN_Q); GL11.glEnable(GL11.GL_LIGHTING); } private FloatBuffer func_147525_a(float p_147525_1_, float p_147525_2_, float p_147525_3_, float p_147525_4_) { field_147528_b.clear(); field_147528_b.put(p_147525_1_).put(p_147525_2_).put(p_147525_3_).put(p_147525_4_); field_147528_b.flip(); return field_147528_b; } }