269 lines
11 KiB
C#
269 lines
11 KiB
C#
#if GRIFFIN
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using System.Collections.Generic;
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using UnityEngine;
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using Type = System.Type;
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namespace Pinwheel.Griffin.PaintTool
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{
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public class GObjectSpawner : IGObjectPainter
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{
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public string Instruction
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{
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get
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{
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return string.Format(
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"Spawn game object into the scene.\n" +
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" - Hold Left Mouse to spawn.\n" +
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" - Hold Ctrl & Left Mouse to erase.");
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}
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}
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public List<Type> SuitableFilterTypes
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{
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get
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{
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List<Type> types = new List<Type>(new Type[]
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{
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typeof(GAlignToSurfaceFilter),
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typeof(GHeightConstraintFilter),
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typeof(GSlopeConstraintFilter),
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typeof(GRotationRandomizeFilter),
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typeof(GScaleRandomizeFilter),
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typeof(GScaleClampFilter)
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});
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GPaintToolUtilities.AddCustomSpawnFilter(types);
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return types;
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}
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}
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public void Paint(Pinwheel.Griffin.GStylizedTerrain terrain, GObjectPainterArgs args)
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{
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if (args.MouseEventType == GPainterMouseEventType.Up)
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return;
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Vector2[] uvCorners = new Vector2[args.WorldPointCorners.Length];
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for (int i = 0; i < uvCorners.Length; ++i)
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{
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uvCorners[i] = terrain.WorldPointToUV(args.WorldPointCorners[i]);
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}
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Rect dirtyRect = GUtilities.GetRectContainsPoints(uvCorners);
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if (!dirtyRect.Overlaps(new Rect(0, 0, 1, 1)))
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return;
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if (args.ActionType == GPainterActionType.Normal)
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{
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HandleSpawnObject(terrain, args);
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}
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else if (args.ActionType == GPainterActionType.Negative)
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{
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HandleEraseObject(terrain, args);
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}
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}
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private void HandleSpawnObject(GStylizedTerrain terrain, GObjectPainterArgs args)
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{
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int prototypeIndex = -1;
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Vector3 randomPos = Vector3.zero;
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Vector3 rayOrigin = Vector3.zero;
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Vector3 rayDirection = Vector3.down;
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float sqrtTwo = Mathf.Sqrt(2);
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Ray ray = new Ray();
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RaycastHit samplePoint;
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Vector3 bary0 = Vector3.zero;
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Vector3 bary1 = Vector3.zero;
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Vector2 maskUv = Vector2.zero;
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Vector2 samplePointTexcoord = Vector2.zero;
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Color maskColor = Color.white;
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Texture2D clonedMask = null;
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Texture2D terrainMask = null;
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if (args.Mask != null)
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{
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clonedMask = GCommon.CloneAndResizeTexture(args.Mask, 256, 256);
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}
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if (args.EnableTerrainMask)
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{
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terrainMask = terrain.TerrainData.Mask.MaskMapOrDefault;
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}
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for (int i = 0; i < args.Density; ++i)
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{
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prototypeIndex = args.PrototypeIndices[Random.Range(0, args.PrototypeIndices.Count)];
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if (prototypeIndex < 0 || prototypeIndex >= args.Prototypes.Count)
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continue;
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GameObject g = args.Prototypes[prototypeIndex];
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if (g == null)
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continue;
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randomPos = args.HitPoint + Random.insideUnitSphere * args.Radius * sqrtTwo;
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rayOrigin.Set(
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randomPos.x,
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10000,
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randomPos.z);
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ray.origin = rayOrigin;
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ray.direction = rayDirection;
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if (terrain.Raycast(ray, out samplePoint, float.MaxValue))
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{
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GUtilities.CalculateBarycentricCoord(
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new Vector2(samplePoint.point.x, samplePoint.point.z),
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new Vector2(args.WorldPointCorners[0].x, args.WorldPointCorners[0].z),
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new Vector2(args.WorldPointCorners[1].x, args.WorldPointCorners[1].z),
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new Vector2(args.WorldPointCorners[2].x, args.WorldPointCorners[2].z),
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ref bary0);
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GUtilities.CalculateBarycentricCoord(
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new Vector2(samplePoint.point.x, samplePoint.point.z),
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new Vector2(args.WorldPointCorners[0].x, args.WorldPointCorners[0].z),
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new Vector2(args.WorldPointCorners[2].x, args.WorldPointCorners[2].z),
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new Vector2(args.WorldPointCorners[3].x, args.WorldPointCorners[3].z),
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ref bary1);
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if (bary0.x >= 0 && bary0.y >= 0 && bary0.z >= 0)
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{
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maskUv = bary0.x * Vector2.zero + bary0.y * Vector2.up + bary0.z * Vector2.one;
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}
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else if (bary1.x >= 0 && bary1.y >= 0 && bary1.z >= 0)
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{
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maskUv = bary1.x * Vector2.zero + bary1.y * Vector2.one + bary1.z * Vector2.right;
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}
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else
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{
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continue;
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}
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//sample mask
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if (clonedMask != null)
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{
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maskColor = clonedMask.GetPixelBilinear(maskUv.x, maskUv.y);
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if (Random.value > maskColor.grayscale)
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continue;
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}
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//sample terrain mask
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if (args.EnableTerrainMask)
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{
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samplePointTexcoord = samplePoint.textureCoord;
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maskColor = terrainMask.GetPixelBilinear(samplePointTexcoord.x, samplePointTexcoord.y);
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if (Random.value < maskColor.r)
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continue;
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}
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//apply filter
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GSpawnFilterArgs filterArgs = GSpawnFilterArgs.Create();
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filterArgs.Terrain = terrain;
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filterArgs.Position = samplePoint.point;
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filterArgs.SurfaceNormal = samplePoint.normal;
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filterArgs.SurfaceTexcoord = samplePoint.textureCoord;
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List<Type> suitableFilter = SuitableFilterTypes;
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if (args.Filters != null)
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{
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for (int fIndex = 0; fIndex < args.Filters.Length; ++fIndex)
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{
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if (args.Filters[fIndex] != null &&
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args.Filters[fIndex].Ignore != true)
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{
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if (suitableFilter.Contains(args.Filters[fIndex].GetType()))
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args.Filters[fIndex].Apply(ref filterArgs);
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}
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if (filterArgs.ShouldExclude)
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break;
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}
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}
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//spawn
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if (filterArgs.ShouldExclude)
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continue;
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//spawn here
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GameObject instance = GSpawner.Spawn(terrain, g, samplePoint.point);
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instance.transform.position = filterArgs.Position;
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instance.transform.rotation = filterArgs.Rotation;
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instance.transform.localScale = filterArgs.Scale;
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}
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}
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if (clonedMask != null)
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Object.DestroyImmediate(clonedMask);
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}
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private void HandleEraseObject(GStylizedTerrain terrain, GObjectPainterArgs args)
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{
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int prototypeIndex = -1;
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Vector2 terrainUv = Vector3.zero;
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Vector3 worldPos = Vector3.zero;
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Vector3 bary0 = Vector3.zero;
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Vector3 bary1 = Vector3.zero;
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Vector2 maskUv = Vector2.zero;
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Color maskColor = Color.white;
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Texture2D clonedMask = null;
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Texture2D terrainMask = null;
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if (args.Mask != null)
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{
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clonedMask = GCommon.CloneAndResizeTexture(args.Mask, 256, 256);
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}
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if (args.EnableTerrainMask)
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{
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terrainMask = terrain.TerrainData.Mask.MaskMapOrDefault;
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}
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for (int i = 0; i < args.PrototypeIndices.Count; ++i)
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{
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prototypeIndex = args.PrototypeIndices[i];
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if (prototypeIndex < 0 || prototypeIndex >= args.Prototypes.Count)
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continue;
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GameObject g = args.Prototypes[prototypeIndex];
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if (g == null)
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continue;
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GSpawner.DestroyIf(terrain, g, (instance =>
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{
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worldPos = instance.transform.position;
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GUtilities.CalculateBarycentricCoord(
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new Vector2(worldPos.x, worldPos.z),
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new Vector2(args.WorldPointCorners[0].x, args.WorldPointCorners[0].z),
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new Vector2(args.WorldPointCorners[1].x, args.WorldPointCorners[1].z),
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new Vector2(args.WorldPointCorners[2].x, args.WorldPointCorners[2].z),
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ref bary0);
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GUtilities.CalculateBarycentricCoord(
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new Vector2(worldPos.x, worldPos.z),
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new Vector2(args.WorldPointCorners[0].x, args.WorldPointCorners[0].z),
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new Vector2(args.WorldPointCorners[2].x, args.WorldPointCorners[2].z),
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new Vector2(args.WorldPointCorners[3].x, args.WorldPointCorners[3].z),
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ref bary1);
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if (bary0.x >= 0 && bary0.y >= 0 && bary0.z >= 0)
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{
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maskUv = bary0.x * Vector2.zero + bary0.y * Vector2.up + bary0.z * Vector2.one;
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}
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else if (bary1.x >= 0 && bary1.y >= 0 && bary1.z >= 0)
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{
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maskUv = bary1.x * Vector2.zero + bary1.y * Vector2.one + bary1.z * Vector2.right;
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}
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else
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{
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return false;
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}
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//sample mask
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if (clonedMask != null)
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{
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maskColor = clonedMask.GetPixelBilinear(maskUv.x, maskUv.y);
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if (Random.value > maskColor.grayscale * args.EraseRatio)
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return false;
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}
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if (args.EnableTerrainMask)
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{
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terrainUv = terrain.WorldPointToUV(worldPos);
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maskColor = terrainMask.GetPixelBilinear(terrainUv.x, terrainUv.y);
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if (Random.value < maskColor.r)
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return false;
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}
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return true;
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}));
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}
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if (clonedMask != null)
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Object.DestroyImmediate(clonedMask);
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}
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}
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}
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#endif
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