67 lines
2.7 KiB
C#
67 lines
2.7 KiB
C#
// Copyright (c) Wojciech Figat. All rights reserved.
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using FlaxEngine;
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using FlaxEditor.Utilities;
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using FlaxEngine.Utilities;
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namespace FlaxEditor.Tools.Terrain.Sculpt
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{
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/// <summary>
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/// Sculpt tool mode that applies the noise to the terrain heightmap area affected by brush.
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/// </summary>
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/// <seealso cref="FlaxEditor.Tools.Terrain.Sculpt.Mode" />
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[HideInEditor]
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public sealed class NoiseMode : Mode
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{
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/// <summary>
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/// The tool noise scale. Adjusts the noise pattern scale.
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/// </summary>
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[EditorOrder(10), Limit(0, 10000), Tooltip("The tool noise scale. Adjusts the noise pattern scale.")]
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public float NoiseScale = 128.0f;
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/// <summary>
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/// The tool noise amount scale. Adjusts the noise amplitude scale.
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/// </summary>
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[EditorOrder(10), Limit(0, 10000000), Tooltip("The tool noise amount scale. Adjusts the noise amplitude scale.")]
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public float NoiseAmount = 10000.0f;
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/// <inheritdoc />
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public override bool SupportsNegativeApply => true;
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/// <inheritdoc />
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public override unsafe void ApplyBrushToPatch(ref ApplyParams p)
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{
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// Prepare
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var brushPosition = p.Gizmo.CursorPosition;
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var noise = new PerlinNoise(0, NoiseScale, p.Strength * NoiseAmount);
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var chunkSize = p.Terrain.ChunkSize;
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var patchSize = chunkSize * FlaxEngine.Terrain.PatchEdgeChunksCount;
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var patchOffset = p.PatchCoord * patchSize;
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// Apply brush modification
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Profiler.BeginEvent("Apply Brush");
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for (int z = 0; z < p.ModifiedSize.Y; z++)
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{
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var zz = z + p.ModifiedOffset.Y;
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for (int x = 0; x < p.ModifiedSize.X; x++)
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{
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var xx = x + p.ModifiedOffset.X;
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var sourceHeight = p.SourceHeightMap[zz * p.HeightmapSize + xx];
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var samplePositionLocal = p.PatchPositionLocal + new Vector3(xx * FlaxEngine.Terrain.UnitsPerVertex, sourceHeight, zz * FlaxEngine.Terrain.UnitsPerVertex);
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Vector3.Transform(ref samplePositionLocal, ref p.TerrainWorld, out Vector3 samplePositionWorld);
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var noiseSample = noise.Sample(xx + patchOffset.X, zz + patchOffset.Y);
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var paintAmount = p.Brush.Sample(ref brushPosition, ref samplePositionWorld);
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p.TempBuffer[z * p.ModifiedSize.X + x] = sourceHeight + noiseSample * paintAmount;
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}
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}
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Profiler.EndEvent();
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// Update terrain patch
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TerrainTools.ModifyHeightMap(p.Terrain, p.PatchCoord, p.TempBuffer, p.ModifiedOffset, p.ModifiedSize);
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}
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}
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}
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