particle sprite animations (dependant on age)

src/main/java/de/bixilon/minosoft/gui/rendering/particle/ParticleRenderer.kt

@@ -19,7 +19,7 @@ import de.bixilon.minosoft.gui.rendering.RenderWindow
 import de.bixilon.minosoft.gui.rendering.Renderer
 import de.bixilon.minosoft.gui.rendering.RendererBuilder
 import de.bixilon.minosoft.gui.rendering.modding.events.CameraMatrixChangeEvent
-import de.bixilon.minosoft.gui.rendering.particle.types.HappyVillagerParticle
+import de.bixilon.minosoft.gui.rendering.particle.types.ExplosionParticle
 import de.bixilon.minosoft.gui.rendering.particle.types.Particle
 import de.bixilon.minosoft.gui.rendering.shader.Shader
 import de.bixilon.minosoft.gui.rendering.textures.Texture
@@ -60,9 +60,9 @@ class ParticleRenderer(
         }
         val random = Random.Default
 
-        val type = connection.registries.particleTypeRegistry[HappyVillagerParticle.RESOURCE_LOCATION]!!
+        val type = connection.registries.particleTypeRegistry[ExplosionParticle.RESOURCE_LOCATION]!!
         for (i in 0 until 10000) {
-            val particle = HappyVillagerParticle(connection, Vec3(random.nextFloat(0.0f, 50.0f), random.nextFloat(6.0f, 50.0f), random.nextFloat(0.0f, 50.0f)), ParticleData(type), Random(random.nextLong()))
+            val particle = ExplosionParticle(connection, Vec3(random.nextFloat(0.0f, 50.0f), random.nextFloat(6.0f, 50.0f), random.nextFloat(0.0f, 50.0f)), ParticleData(type), Random(random.nextLong()))
             // particle.grow(0.5f, 20000L)
             // particle.velocity = Vec3(1f, 0.2f, 1f)
             // particle.friction = Vec3(0.1f, 0.1f, 0.1f)

src/main/java/de/bixilon/minosoft/gui/rendering/particle/types/ExplosionParticle.kt

@@ -0,0 +1,33 @@
+/*
+ * Minosoft
+ * Copyright (C) 2021 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.gui.rendering.particle.types
+
+import de.bixilon.minosoft.data.mappings.ResourceLocation
+import de.bixilon.minosoft.data.mappings.particle.data.ParticleData
+import de.bixilon.minosoft.gui.rendering.particle.ParticleFactory
+import de.bixilon.minosoft.protocol.network.connection.PlayConnection
+import de.bixilon.minosoft.util.KUtil.asResourceLocation
+import glm_.vec3.Vec3
+import kotlin.random.Random
+
+class ExplosionParticle(connection: PlayConnection, position: Vec3, data: ParticleData, random: Random) : Particle(connection, position, data, random) {
+
+    companion object : ParticleFactory<ExplosionParticle> {
+        override val RESOURCE_LOCATION: ResourceLocation = "minecraft:explosion".asResourceLocation()
+
+        override fun build(connection: PlayConnection, position: Vec3, data: ParticleData, random: Random): ExplosionParticle {
+            return ExplosionParticle(connection, position, data, random)
+        }
+    }
+}

src/main/java/de/bixilon/minosoft/gui/rendering/particle/types/Particle.kt

@@ -25,7 +25,7 @@ import kotlin.math.abs
 import kotlin.random.Random
 
 abstract class Particle(protected val connection: PlayConnection, protected val position: Vec3, protected val data: ParticleData, protected val random: Random) {
-    protected val texture = connection.rendering!!.renderWindow.textures.allTextures[data.type.textures.random()]!!
+    protected var texture = connection.rendering!!.renderWindow.textures.allTextures[data.type.textures.first()]!!
     protected var scale: Float = 0.1f
     protected var color: RGBColor = ChatColors.WHITE
 
@@ -39,7 +39,7 @@ abstract class Particle(protected val connection: PlayConnection, protected val
     var dead = false
     var age: Int = 0
         protected set
-    var maxAge: Int = 100000 + random.nextInt(0, 10000)
+    var maxAge: Int = 10000 + random.nextInt(0, 10000)
 
     // moving
     var friction = Vec3.EMPTY
@@ -107,7 +107,7 @@ abstract class Particle(protected val connection: PlayConnection, protected val
             hoverMaxY - position.y
         }
         val totalDistance = hoverMaxY - hoverMinY
-        val yVelocity = 1 / (totalDistance / distanceToMiddle)
+        val yFriction = 1 / (totalDistance / distanceToMiddle)
 
 
         when {
@@ -120,11 +120,24 @@ abstract class Particle(protected val connection: PlayConnection, protected val
                 velocity.y = -1.0f
             }
             else -> {
-                friction.y = yVelocity
+                friction.y = yFriction
             }
         }
     }
 
+    private fun checkSpriteTexture() {
+        val totalTextures = data.type.textures.size
+        if (totalTextures <= 1) {
+            return
+        }
+        // calculate next texture
+        val nextTextureResourceLocation = data.type.textures[age / ((maxAge / totalTextures) + 1)]
+        if (texture.resourceLocation == nextTextureResourceLocation) {
+            return
+        }
+        texture = connection.rendering!!.renderWindow.textures.allTextures[nextTextureResourceLocation]!!
+    }
+
     open fun tick() {
         check(!dead) { "Cannot tick dead particle!" }
         val currentTime = System.currentTimeMillis()
@@ -147,6 +160,8 @@ abstract class Particle(protected val connection: PlayConnection, protected val
         move(deltaTime)
         hover(deltaTime)
 
+        checkSpriteTexture()
+
         lastTickTime = currentTime
     }