125 lines
3.3 KiB
Java
125 lines
3.3 KiB
Java
package appeng.client.render;
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import java.util.Random;
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import net.minecraft.client.Minecraft;
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import net.minecraft.client.multiplayer.WorldClient;
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import net.minecraft.client.renderer.GLAllocation;
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import net.minecraft.client.renderer.OpenGlHelper;
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import net.minecraft.client.renderer.RenderHelper;
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import net.minecraft.client.renderer.Tessellator;
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import net.minecraftforge.client.IRenderHandler;
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import org.lwjgl.opengl.GL11;
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public class SpatialSkyRender extends IRenderHandler
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{
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private static SpatialSkyRender instance = new SpatialSkyRender();
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private Random random = new Random();
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private long cycle = 0;
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private int dspList;
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public SpatialSkyRender() {
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dspList = GLAllocation.generateDisplayLists( 1 );
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}
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@Override
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public void render(float partialTicks, WorldClient world, Minecraft mc)
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{
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long now = System.currentTimeMillis();
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if ( now - cycle > 2000 )
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{
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cycle = now;
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GL11.glNewList( dspList, GL11.GL_COMPILE );
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renderTwinkles();
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GL11.glEndList();
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}
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float fade = now - cycle;
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fade /= 1000;
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fade = 0.15f * (1.0f - Math.abs( (fade - 1.0f) * (fade - 1.0f) ));
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if ( fade > 0.0f )
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{
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GL11.glPushAttrib( GL11.GL_ALL_ATTRIB_BITS );
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GL11.glDisable( GL11.GL_FOG );
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GL11.glDisable( GL11.GL_ALPHA_TEST );
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GL11.glEnable( GL11.GL_BLEND );
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GL11.glDepthMask( false );
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GL11.glEnable( GL11.GL_FOG );
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GL11.glDisable( GL11.GL_FOG );
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GL11.glDisable( GL11.GL_ALPHA_TEST );
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GL11.glEnable( GL11.GL_BLEND );
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GL11.glDisable( GL11.GL_TEXTURE_2D );
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OpenGlHelper.glBlendFunc( 770, 771, 1, 0 );
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RenderHelper.disableStandardItemLighting();
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GL11.glDepthMask( false );
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GL11.glColor4f( fade, fade, fade, 1.0f );
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GL11.glCallList( dspList );
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GL11.glPopAttrib();
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}
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}
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private void renderTwinkles()
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{
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Tessellator tessellator = Tessellator.instance;
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tessellator.startDrawingQuads();
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for (int i = 0; i < 50; ++i)
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{
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double iX = (double) (random.nextFloat() * 2.0F - 1.0F);
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double iY = (double) (random.nextFloat() * 2.0F - 1.0F);
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double iZ = (double) (random.nextFloat() * 2.0F - 1.0F);
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double d3 = (double) (0.05F + random.nextFloat() * 0.1F);
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double dist = iX * iX + iY * iY + iZ * iZ;
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if ( dist < 1.0D && dist > 0.01D )
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{
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dist = 1.0D / Math.sqrt( dist );
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iX *= dist;
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iY *= dist;
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iZ *= dist;
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double x = iX * 100.0D;
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double y = iY * 100.0D;
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double z = iZ * 100.0D;
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double d8 = Math.atan2( iX, iZ );
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double d9 = Math.sin( d8 );
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double d10 = Math.cos( d8 );
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double d11 = Math.atan2( Math.sqrt( iX * iX + iZ * iZ ), iY );
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double d12 = Math.sin( d11 );
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double d13 = Math.cos( d11 );
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double d14 = random.nextDouble() * Math.PI * 2.0D;
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double d15 = Math.sin( d14 );
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double d16 = Math.cos( d14 );
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for (int j = 0; j < 4; ++j)
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{
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double d17 = 0.0D;
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double d18 = (double) ((j & 2) - 1) * d3;
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double d19 = (double) ((j + 1 & 2) - 1) * d3;
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double d20 = d18 * d16 - d19 * d15;
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double d21 = d19 * d16 + d18 * d15;
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double d22 = d20 * d12 + d17 * d13;
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double d23 = d17 * d12 - d20 * d13;
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double d24 = d23 * d9 - d21 * d10;
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double d25 = d21 * d9 + d23 * d10;
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tessellator.addVertex( x + d24, y + d22, z + d25 );
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}
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}
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}
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tessellator.draw();
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}
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public static IRenderHandler getInstance()
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{
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return instance;
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}
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}
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