par1 *= par1;
par1 = par1 * 0.9F + 0.1F;
}
GL11.glColor4f(1.0F, 1.0F, 1.0F, par1);
RenderUtil.bindBlockTexture();
IIcon icon = Blocks.portal.getBlockTextureFromSide(1);
float f1 = icon.getMinU();
float f2 = icon.getMinV();
float f3 = icon.getMaxU();
float f4 = icon.getMaxV();
Tessellator tessellator = Tessellator.instance;
tessellator.startDrawingQuads();
tessellator.addVertexWithUV(0.0D, par3, -90.0D, f1, f4);
tessellator.addVertexWithUV(par2, par3, -90.0D, f3, f4);
tessellator.addVertexWithUV(par2, 0.0D, -90.0D, f3, f2);