Add mirage spell

2020-10-18 22:12:14 +01:00
parent cf8de05d1b
commit 89345d4fbc
9 changed files with 88 additions and 0 deletions
@@ -0,0 +1,45 @@
+package electroblob.wizardry.client.renderer.effect;
+
+import electroblob.wizardry.registry.WizardryPotions;
+import net.minecraft.client.renderer.GlStateManager;
+import net.minecraft.client.renderer.GlStateManager.DestFactor;
+import net.minecraft.client.renderer.GlStateManager.SourceFactor;
+import net.minecraftforge.client.event.RenderLivingEvent;
+import net.minecraftforge.fml.common.Mod.EventBusSubscriber;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+import net.minecraftforge.fml.relauncher.Side;
+
+import java.util.Random;
+
+@EventBusSubscriber(Side.CLIENT)
+public class RenderMirage {
+
+	private static final int BLINK_PERIOD_1 = 47; // Use two prime numbers to make it look as chaotic as possible
+	private static final int BLINK_PERIOD_2 = 71;
+
+	private static final double MAX_OFFSET = 3;
+
+	private static final Random random = new Random(); // Seed will be set later
+
+	@SubscribeEvent
+	public static void onRenderLivingEvent(RenderLivingEvent.Pre<?> event){
+		if(event.getEntity().isPotionActive(WizardryPotions.mirage)){
+			random.setSeed(event.getEntity().ticksExisted / BLINK_PERIOD_1
+						 + event.getEntity().ticksExisted / BLINK_PERIOD_2);
+			GlStateManager.pushMatrix();
+			GlStateManager.blendFunc(SourceFactor.SRC_ALPHA, DestFactor.ONE); // GhoOOoOostly OooOOOo00oOOo
+			GlStateManager.color(1, 1, 1, 0.5f);
+			GlStateManager.translate((random.nextDouble() * 2 - 1) * MAX_OFFSET,
+					(random.nextDouble() * 2 - 1) * MAX_OFFSET, (random.nextDouble() * 2 - 1) * MAX_OFFSET);
+		}
+	}
+
+	@SubscribeEvent
+	public static void onRenderLivingEvent(RenderLivingEvent.Post<?> event){
+		if(event.getEntity().isPotionActive(WizardryPotions.mirage)){
+			GlStateManager.blendFunc(SourceFactor.SRC_ALPHA, DestFactor.ONE_MINUS_SRC_ALPHA);
+			GlStateManager.popMatrix();
+		}
+	}
+
+}