[Community] [3D particles] Fix the size of particles that were 3 times too small (#1004)

Author: D8H

extensions/community/ParticleEmitter3D.json

@@ -8,13 +8,16 @@
   "name": "ParticleEmitter3D",
   "previewIconUrl": "https://asset-resources.gdevelop.io/public-resources/Icons/f2e5a34bf465f781866677762d385d6c8e9e8d203383f2df9a3b7e0fad6a2cb5_fire.svg",
   "shortDescription": "Display a large number of particles to create visual effects.",
-  "version": "0.0.2",
+  "version": "1.0.0",
   "description": [
     "Particle emitters can be used to display:",
     "- Fire",
     "- Smoke",
     "- Splashes",
-    "- Lights"
+    "- Lights",
+    "",
+    "Breaking change from 1.0.0:",
+    "- Particles were 3 times too small"
   ],
   "tags": [
     "3d",
@@ -2787,7 +2790,7 @@
                 "            }",
                 "            if (this.worldSpace) {",
                 "                particle.position.applyMatrix4(matrix);",
-                "                particle.startSize = (particle.startSize * (scale.x + scale.y + scale.z)) / 3;",
+                "                particle.startSize = (particle.startSize * (Math.abs(scale.x) + Math.abs(scale.y) + Math.abs(scale.z))) / 3;",
                 "                particle.size = particle.startSize;",
                 "                particle.velocity.multiply(scale).applyMatrix3(this.normalMatrix);",
                 "                if (particle.rotation && particle.rotation instanceof THREE.Quaternion) {",
@@ -3835,7 +3838,7 @@
                 "                        this.sizeBuffer.setX(index, particle.size);",
                 "                    }",
                 "                    else {",
-                "                        this.sizeBuffer.setX(index, (particle.size * (scale.x + scale.y + scale.z)) / 3);",
+                "                        this.sizeBuffer.setX(index, (particle.size * (Math.abs(scale.x) + Math.abs(scale.y) + Math.abs(scale.z))) / 3);",
                 "                    }",
                 "                }",
                 "                this.uvTileBuffer.setX(index, particle.uvTile);",
@@ -4189,8 +4192,8 @@
                 "                            this.widthBuffer.setX(index + 1, current.size);",
                 "                        }",
                 "                        else {",
-                "                            this.widthBuffer.setX(index, (current.size * (scale.x + scale.y + scale.z)) / 3);",
-                "                            this.widthBuffer.setX(index + 1, (current.size * (scale.x + scale.y + scale.z)) / 3);",
+                "                            this.widthBuffer.setX(index, (current.size * (Math.abs(scale.x) + Math.abs(scale.y) + Math.abs(scale.z))) / 3);",
+                "                            this.widthBuffer.setX(index + 1, (current.size * (Math.abs(scale.x) + Math.abs(scale.y) + Math.abs(scale.z))) / 3);",
                 "                        }",
                 "                    }",
                 "                    this.uvBuffer.setXY(index, (i / particle.previous.length + col) * tileWidth, (vTileCount - row - 1) * tileHeight);",