Java tutorial
package mattparks.mods.starcraft.io.client; import java.util.Random; import mattparks.mods.starcraft.io.IoCore; import micdoodle8.mods.galacticraft.core.GCCoreConfigManager; import micdoodle8.mods.galacticraft.core.GalacticraftCore; 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; import org.lwjgl.opengl.GL11; import cpw.mods.fml.client.FMLClientHandler; /** * This file is part of the 4-Space project * * @author mattparks * @license Lesser GNU Public License v3 (http://www.gnu.org/licenses/lgpl.html) * */ public class SCIoSkyProvider extends IRenderHandler { private static final ResourceLocation jupiterTexture = new ResourceLocation(IoCore.ASSET_DOMAIN, "textures/gui/planets/jupiter.png"); private static final ResourceLocation overworldTexture = new ResourceLocation(GalacticraftCore.ASSET_DOMAIN, "textures/gui/planets/overworld.png"); private static final ResourceLocation sunTexture = new ResourceLocation(IoCore.ASSET_DOMAIN, "textures/environment/sun.png"); public int starList; public int glSkyList; public int glSkyList2; public SCIoSkyProvider() { int displayLists = GLAllocation.generateDisplayLists(3); this.starList = displayLists; this.glSkyList = displayLists + 1; this.glSkyList2 = displayLists + 2; // Bind stars to display list GL11.glPushMatrix(); GL11.glNewList(this.starList, GL11.GL_COMPILE); this.renderStars(); GL11.glEndList(); GL11.glPopMatrix(); final Tessellator tessellator = Tessellator.instance; GL11.glNewList(this.glSkyList, GL11.GL_COMPILE); final byte byte2 = 64; final int i = 256 / byte2 + 2; float f = 16F; for (int j = -byte2 * i; j <= byte2 * i; j += byte2) { for (int l = -byte2 * i; l <= byte2 * i; l += byte2) { tessellator.startDrawingQuads(); tessellator.addVertex(j + 0, f, l + 0); tessellator.addVertex(j + byte2, f, l + 0); tessellator.addVertex(j + byte2, f, l + byte2); tessellator.addVertex(j + 0, f, l + byte2); tessellator.draw(); } } GL11.glEndList(); GL11.glNewList(this.glSkyList2, GL11.GL_COMPILE); f = -16F; tessellator.startDrawingQuads(); for (int k = -byte2 * i; k <= byte2 * i; k += byte2) { for (int i1 = -byte2 * i; i1 <= byte2 * i; i1 += byte2) { tessellator.addVertex(k + byte2, f, i1 + 0); tessellator.addVertex(k + 0, f, i1 + 0); tessellator.addVertex(k + 0, f, i1 + byte2); tessellator.addVertex(k + byte2, f, i1 + byte2); } } tessellator.draw(); GL11.glEndList(); } @Override public void render(float partialTicks, WorldClient world, Minecraft mc) { GL11.glDisable(GL11.GL_TEXTURE_2D); Vec3 vec3 = world.getSkyColor(mc.renderViewEntity, partialTicks); float f1 = (float) vec3.xCoord; float f2 = (float) vec3.yCoord; float f3 = (float) vec3.zCoord; float f6; if (mc.gameSettings.anaglyph) { float f4 = (f1 * 30.0F + f2 * 59.0F + f3 * 11.0F) / 100.0F; float f5 = (f1 * 30.0F + f2 * 70.0F) / 100.0F; f6 = (f1 * 30.0F + f3 * 70.0F) / 100.0F; f1 = f4; f2 = f5; f3 = f6; } 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); // OpenGlHelper.glBlendFunc(770, 771, 1, 0); RenderHelper.disableStandardItemLighting(); float[] afloat = world.provider.calcSunriseSunsetColors(world.getCelestialAngle(partialTicks), partialTicks); float f7; float f8; float f9; float f10; float f18 = world.getStarBrightness(partialTicks); if (f18 > 0.0F) { GL11.glColor4f(f18, f18, f18, f18); GL11.glCallList(this.starList); } afloat = new float[4]; GL11.glDisable(GL11.GL_TEXTURE_2D); GL11.glShadeModel(GL11.GL_SMOOTH); GL11.glPushMatrix(); GL11.glRotatef(-90.0F, 0.0F, 1.0F, 0.0F); GL11.glRotatef(world.getCelestialAngle(partialTicks) * 360.0F, 1.0F, 0.0F, 0.0F); afloat[0] = 255 / 255.0F; afloat[1] = 194 / 255.0F; afloat[2] = 180 / 255.0F; afloat[3] = 0.3F; f6 = afloat[0]; f7 = afloat[1]; f8 = afloat[2]; float f11; float var12; if (mc.gameSettings.anaglyph) { f9 = (f6 * 30.0F + f7 * 59.0F + f8 * 11.0F) / 100.0F; f10 = (f6 * 30.0F + f7 * 70.0F) / 100.0F; f11 = (f6 * 30.0F + f8 * 70.0F) / 100.0F; f6 = f9; f7 = f10; f8 = f11; } final Tessellator var23 = Tessellator.instance; tessellator1.startDrawing(GL11.GL_TRIANGLE_FAN); tessellator1.setColorRGBA_F(f6, f7, f8, afloat[3] * 2); tessellator1.addVertex(0.0D, 100.0D, 0.0D); byte b0 = 16; tessellator1.setColorRGBA_F(afloat[0], afloat[1], afloat[2], 0.0F); // Render sun aura f10 = 20.0F; tessellator1.addVertex((double) -f10, 100.0D, (double) -f10); tessellator1.addVertex((double) 0, 100.0D, (double) -f10 * 1.5F); tessellator1.addVertex((double) f10, 100.0D, (double) -f10); tessellator1.addVertex((double) f10 * 1.5F, 100.0D, (double) 0); tessellator1.addVertex((double) f10, 100.0D, (double) f10); tessellator1.addVertex((double) 0, 100.0D, (double) f10 * 1.5F); tessellator1.addVertex((double) -f10, 100.0D, (double) f10); tessellator1.addVertex((double) -f10 * 1.5F, 100.0D, (double) 0); tessellator1.addVertex((double) -f10, 100.0D, (double) -f10); tessellator1.draw(); tessellator1.startDrawing(GL11.GL_TRIANGLE_FAN); tessellator1.setColorRGBA_F(f6, f7, f8, afloat[3]); tessellator1.addVertex(0.0D, 100.0D, 0.0D); tessellator1.setColorRGBA_F(afloat[0], afloat[1], afloat[2], 0.0F); // Render larger sun aura f10 = 40.0F; tessellator1.addVertex((double) -f10, 100.0D, (double) -f10); tessellator1.addVertex((double) 0, 100.0D, (double) -f10 * 1.5F); tessellator1.addVertex((double) f10, 100.0D, (double) -f10); tessellator1.addVertex((double) f10 * 1.5F, 100.0D, (double) 0); tessellator1.addVertex((double) f10, 100.0D, (double) f10); tessellator1.addVertex((double) 0, 100.0D, (double) f10 * 1.5F); tessellator1.addVertex((double) -f10, 100.0D, (double) f10); tessellator1.addVertex((double) -f10 * 1.5F, 100.0D, (double) 0); tessellator1.addVertex((double) -f10, 100.0D, (double) -f10); tessellator1.draw(); GL11.glPopMatrix(); GL11.glShadeModel(GL11.GL_FLAT); GL11.glEnable(GL11.GL_TEXTURE_2D); // OpenGlHelper.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE, GL11.GL_ONE, GL11.GL_ZERO); GL11.glPushMatrix(); f7 = 0.0F; f8 = 0.0F; f9 = 0.0F; GL11.glColor4f(1.0F, 1.0F, 1.0F, 1.0F); GL11.glTranslatef(f7, f8, f9); GL11.glRotatef(-90.0F, 0.0F, 1.0F, 0.0F); GL11.glRotatef(world.getCelestialAngle(partialTicks) * 360.0F, 1.0F, 0.0F, 0.0F); // Render sun f10 = 14.0F; mc.renderEngine.bindTexture(sunTexture); tessellator1.startDrawingQuads(); tessellator1.addVertexWithUV((double) (-f10), 400.0D, (double) (-f10), 0.0D, 0.0D); tessellator1.addVertexWithUV((double) f10, 400.0D, (double) (-f10), 1.0D, 0.0D); tessellator1.addVertexWithUV((double) f10, 400.0D, (double) f10, 1.0D, 1.0D); tessellator1.addVertexWithUV((double) (-f10), 400.0D, (double) f10, 0.0D, 1.0D); tessellator1.draw(); // JUPITER: var12 = 10.0F; final float jupiterRotation = (float) (world.getSpawnPoint().posZ - mc.thePlayer.posZ) * 0.01F; GL11.glRotatef(-180.0F, 0.0F, 1.0F, 0.0F); GL11.glColor4f(1.0F, 1.0F, 1.0F, 5F); GL11.glRotatef(world.getCelestialAngle(partialTicks) * 100.0F, 1.0F, 0.0F, 0.0F); var12 = 30.0F; FMLClientHandler.instance().getClient().renderEngine.bindTexture(SCIoSkyProvider.jupiterTexture); var23.startDrawingQuads(); var23.addVertexWithUV(-var12, 75.0D, -var12, 0.0D, 0.0D); var23.addVertexWithUV(var12, 75.0D, -var12, 1.0D, 0.0D); var23.addVertexWithUV(var12, 75.0D, var12, 1.0D, 1.0D); var23.addVertexWithUV(-var12, 75.0D, var12, 0.0D, 1.0D); var23.draw(); // Render earth f10 = 0.5F; GL11.glScalef(0.6F, 0.6F, 0.6F); GL11.glRotatef(40.0F, 0.0F, 0.0F, 1.0F); GL11.glRotatef(200F, 1.0F, 0.0F, 0.0F); GL11.glColor4f(1.0F, 1.0F, 1.0F, 1F); FMLClientHandler.instance().getClient().renderEngine.bindTexture(SCIoSkyProvider.overworldTexture); tessellator1.startDrawingQuads(); tessellator1.addVertexWithUV(-f10, -100.0D, f10, 0, 1); tessellator1.addVertexWithUV(f10, -100.0D, f10, 1, 1); tessellator1.addVertexWithUV(f10, -100.0D, -f10, 1, 0); tessellator1.addVertexWithUV(-f10, -100.0D, -f10, 0, 0); tessellator1.draw(); GL11.glDisable(GL11.GL_TEXTURE_2D); 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(partialTicks).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((double) (-f8), (double) f9, (double) f8); tessellator1.addVertex((double) f8, (double) f9, (double) f8); tessellator1.addVertex((double) f8, (double) f10, (double) f8); tessellator1.addVertex((double) (-f8), (double) f10, (double) f8); tessellator1.addVertex((double) (-f8), (double) f10, (double) (-f8)); tessellator1.addVertex((double) f8, (double) f10, (double) (-f8)); tessellator1.addVertex((double) f8, (double) f9, (double) (-f8)); tessellator1.addVertex((double) (-f8), (double) f9, (double) (-f8)); tessellator1.addVertex((double) f8, (double) f10, (double) (-f8)); tessellator1.addVertex((double) f8, (double) f10, (double) f8); tessellator1.addVertex((double) f8, (double) f9, (double) f8); tessellator1.addVertex((double) f8, (double) f9, (double) (-f8)); tessellator1.addVertex((double) (-f8), (double) f9, (double) (-f8)); tessellator1.addVertex((double) (-f8), (double) f9, (double) f8); tessellator1.addVertex((double) (-f8), (double) f10, (double) f8); tessellator1.addVertex((double) (-f8), (double) f10, (double) (-f8)); tessellator1.addVertex((double) (-f8), (double) f10, (double) (-f8)); tessellator1.addVertex((double) (-f8), (double) f10, (double) f8); tessellator1.addVertex((double) f8, (double) f10, (double) f8); tessellator1.addVertex((double) f8, (double) f10, (double) (-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); } private void renderStars() { final Random rand = new Random(10842L); final Tessellator var2 = Tessellator.instance; var2.startDrawingQuads(); for (int starIndex = 0; starIndex < (GCCoreConfigManager.moreStars ? 35000 : 6000); ++starIndex) { double var4 = rand.nextFloat() * 2.0F - 1.0F; double var6 = rand.nextFloat() * 2.0F - 1.0F; double var8 = rand.nextFloat() * 2.0F - 1.0F; final double var10 = 0.15F + rand.nextFloat() * 0.1F; double var12 = var4 * var4 + var6 * var6 + var8 * var8; if (var12 < 1.0D && var12 > 0.01D) { var12 = 1.0D / Math.sqrt(var12); var4 *= var12; var6 *= var12; var8 *= var12; final double var14 = var4 * (GCCoreConfigManager.moreStars ? rand.nextDouble() * 150D + 130D : 100.0D); final double var16 = var6 * (GCCoreConfigManager.moreStars ? rand.nextDouble() * 150D + 130D : 100.0D); final double var18 = var8 * (GCCoreConfigManager.moreStars ? rand.nextDouble() * 150D + 130D : 100.0D); final double var20 = Math.atan2(var4, var8); final double var22 = Math.sin(var20); final double var24 = Math.cos(var20); final double var26 = Math.atan2(Math.sqrt(var4 * var4 + var8 * var8), var6); final double var28 = Math.sin(var26); final double var30 = Math.cos(var26); final double var32 = rand.nextDouble() * Math.PI * 2.0D; final double var34 = Math.sin(var32); final double var36 = Math.cos(var32); for (int var38 = 0; var38 < 4; ++var38) { final double var39 = 0.0D; final double var41 = ((var38 & 2) - 1) * var10; final double var43 = ((var38 + 1 & 2) - 1) * var10; final double var47 = var41 * var36 - var43 * var34; final double var49 = var43 * var36 + var41 * var34; final double var53 = var47 * var28 + var39 * var30; final double var55 = var39 * var28 - var47 * var30; final double var57 = var55 * var22 - var49 * var24; final double var61 = var49 * var22 + var55 * var24; var2.addVertex(var14 + var57, var16 + var53, var18 + var61); } } } var2.draw(); } private Vec3 getCustomSkyColor() { return Vec3.fakePool.getVecFromPool(0.26796875D, 0.1796875D, 0.0D); } public float getSkyBrightness(float par1) { final float var2 = FMLClientHandler.instance().getClient().theWorld.getCelestialAngle(par1); float var3 = 1.0F - (MathHelper.sin(var2 * (float) Math.PI * 2.0F) * 2.0F + 0.25F); if (var3 < 0.0F) { var3 = 0.0F; } if (var3 > 1.0F) { var3 = 1.0F; } return var3 * var3 * 1F; } }