feat: add selection of influence

Author: Renardjojo

Runtime/TerrainInfluenceMap.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using Unity.Profiling;
 using UnityEditor;
+using UnityEditor.VersionControl;
 using UnityEngine;
 using UnityEngine.Assertions;
 using UnityEngine.Rendering;
@@ -29,6 +30,14 @@ public int Resolution
                 GenerateRenderTexture();
             }
         }
+        
+        public Vector2 Position
+        {
+            get
+            {
+                return new Vector2(m_terrain.GetPosition().x, m_terrain.GetPosition().z);
+            }
+        }
         public bool lowPrescision = true;
 
         private List<IInfluencer> m_influencers = new List<IInfluencer>();
@@ -133,26 +142,46 @@ void Update()
         }
 #endregion
 
-        public Color[] GetDatas()
+        public Color[] GetDatas(Rect localRect)
         {
-            return GetDatas(0, 0, m_renderTexture.width, m_renderTexture.height);
-        }
+            Assert.IsFalse(localRect.xMin < 0 || localRect.yMin < 0 || localRect.xMin > m_renderTexture.width ||
+                           localRect.yMin > m_renderTexture.height ||
+                           localRect.width < 0 || localRect.height < 0 || localRect.width > m_renderTexture.width ||
+                           localRect.height > m_renderTexture.height ||
+                           (int) localRect.height * (int) localRect.width == 0);
+            
+            Texture2D texture = new Texture2D((int)localRect.width, (int)localRect.height, lowPrescision ? TextureFormat.R8 : TextureFormat.R16, false);
 
-        public Color[] GetDatas(int x, int y, int width, int height)
-        {
-            Texture2D texture = new Texture2D(width, height, lowPrescision ? TextureFormat.R8 : TextureFormat.R16, false);
-            Rect rectReadPicture = new Rect(0, 0, width, height);
-         
             RenderTexture.active = m_renderTexture;
-         
+                 
             // Read pixels
-            texture.ReadPixels(rectReadPicture, 0, 0);
+            localRect.y = m_renderTexture.height - localRect.y - localRect.height; // renderTexture is vertical flipped
+            texture.ReadPixels(localRect, 0, 0);
             texture.Apply();
-         
+                 
             RenderTexture.active = null; // added to avoid errors
             return texture.GetPixels();
         }
 
+        public Color[] GetDatas()
+        {
+            return GetDatas(new Rect(0, 0, m_renderTexture.width, m_renderTexture.height));
+        }
+
+        Rect RemapTerrainRectToLocalRect(in Rect worldRect)
+        {
+            Rect locRect = new Rect();
+            locRect.position = worldRect.position - Position;
+            locRect.size = worldRect.size / Resolution;
+            return locRect;
+        }
+        
+        public Color[] GetDatasInWorld(in Rect worldRect)
+        {
+            
+            return GetDatas(RemapTerrainRectToLocalRect(worldRect));
+        }
+
         private void GenerateRenderTexture()
         {
 #if UNITY_EDITOR
@@ -167,8 +196,8 @@ private void GenerateRenderTexture()
             m_renderTexture.Create();
 
 #if UNITY_EDITOR
-                if (m_drawDebug)
-                    m_terrain.materialTemplate.SetTexture(s_shaderPropertyTexture, m_renderTexture);
+            if (m_drawDebug)
+                m_terrain.materialTemplate.SetTexture(s_shaderPropertyTexture, m_renderTexture);
 #endif
         }
 
@@ -183,7 +212,7 @@ public void UpdateBuffer()
 
             TerrainData terrainData = m_terrain.terrainData;
             Vector2 terrainSize = new Vector2(terrainData.size.x, terrainData.size.z);
-            Vector2 terrainMinPos = new Vector2(m_terrain.GetPosition().x, m_terrain.GetPosition().z);
+            Vector2 terrainMinPos = Position;
             Vector2 terrainMaxPos = terrainMinPos + terrainSize;
 
             foreach (IInfluencer influencer in m_influencers)

Samples~/Demo/Demo.unity

@@ -262,11 +262,12 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 95defaa93e48bc748b130a6887251d30, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  camera: {fileID: 817550761}
+  m_camera: {fileID: 817550761}
   terrains: []
   InfluenceMapTeam1: []
   InfluenceMapTeam2: []
   m_drawDebug: 0
+  renderTexture: []
 --- !u!4 &377053535
 Transform:
   m_ObjectHideFlags: 0
@@ -293,7 +294,7 @@ GameObject:
   m_Layer: 0
   m_Name: Team2Start
   m_TagString: Untagged
-  m_Icon: {fileID: 0}
+  m_Icon: {fileID: 419385456094870383, guid: 0000000000000000d000000000000000, type: 0}
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
   m_IsActive: 1
@@ -305,7 +306,7 @@ Transform:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 475135626}
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
-  m_LocalPosition: {x: 20, y: 0, z: 0}
+  m_LocalPosition: {x: 25, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_Children: []
   m_Father: {fileID: 0}
@@ -438,15 +439,15 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 490976, guid: 65f2022d55af99148b54465b7b1af222, type: 3}
       propertyPath: m_LocalPosition.x
-      value: 0
+      value: -50
       objectReference: {fileID: 0}
     - target: {fileID: 490976, guid: 65f2022d55af99148b54465b7b1af222, type: 3}
       propertyPath: m_LocalPosition.y
       value: 0
       objectReference: {fileID: 0}
     - target: {fileID: 490976, guid: 65f2022d55af99148b54465b7b1af222, type: 3}
       propertyPath: m_LocalPosition.z
-      value: -37.36
+      value: -50
       objectReference: {fileID: 0}
     - target: {fileID: 490976, guid: 65f2022d55af99148b54465b7b1af222, type: 3}
       propertyPath: m_LocalRotation.w
@@ -540,8 +541,8 @@ Camera:
   near clip plane: 0.3
   far clip plane: 1000
   field of view: 60
-  orthographic: 0
-  orthographic size: 25
+  orthographic: 1
+  orthographic size: 75
   m_Depth: -1
   m_CullingMask:
     serializedVersion: 2
@@ -565,7 +566,7 @@ Transform:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 817550757}
   m_LocalRotation: {x: 0.7071068, y: 0, z: 0, w: 0.7071067}
-  m_LocalPosition: {x: 0, y: 50, z: 0}
+  m_LocalPosition: {x: 51.52, y: 50, z: 53.59}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_Children: []
   m_Father: {fileID: 0}
@@ -798,7 +799,7 @@ Transform:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 2303954083559105647}
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
-  m_LocalPosition: {x: -20, y: 0, z: 0}
+  m_LocalPosition: {x: -25, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_Children: []
   m_Father: {fileID: 0}

Samples~/Demo/Scripts/Controls/TopCamera.cs

@@ -5,6 +5,7 @@
 
 #endif
 
+[RequireComponent(typeof(Camera))]
 public class TopCamera : MonoBehaviour
 {
     [SerializeField] private int MoveSpeed = 20;
@@ -16,19 +17,29 @@ public class TopCamera : MonoBehaviour
     Action<float> OnMoveHorizontal;
     Action<float> OnMoveVertical;
 
+    private Camera m_camera;
+
     Vector3 Move = Vector3.zero;
 
     private void Start()
     {
+        m_camera = GetComponent<Camera>();
+        
         OnMouseScroll += (float value) =>
         {
             if (value < 0f && transform.position.y < MaxHeight)
             {
-                Move.y += ZoomSpeed * Time.deltaTime;
+                if (m_camera.orthographic)
+                    m_camera.orthographicSize += ZoomSpeed * Time.deltaTime;
+                else
+                    Move.y += ZoomSpeed * Time.deltaTime;
             }
             else if (value > 0f && transform.position.y > MinHeight)
             {
-                Move.y -= ZoomSpeed * Time.deltaTime;
+                if (m_camera.orthographic)
+                    m_camera.orthographicSize -= ZoomSpeed * Time.deltaTime;
+                else
+                    Move.y -= ZoomSpeed * Time.deltaTime;
             }
         };