Applied-Energistics-2-tiler.../client/render/SpatialSkyRender.java

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