private bool Height(Terrain terrain, IOnPaint editContext, Vector2 currUV, Vector2 prevUV, BrushSettings brushSettings)
{
// the brush size is relative to the main brush size
float brushSize = brushSettings.brushSize * heightBrushSize / 100f;
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, currUV, brushSize, brushSettings.brushRotationDegrees);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
Material mat = TerrainPaintUtility.GetBuiltinPaintMaterial();
float brushStrength = heightBrushStrength / 100f;
brushStrength = Event.current.shift ? -brushStrength : brushStrength;
brushStrength *= 0.001f; // magic number ...
Vector4 brushParams = new Vector4(brushStrength, 0.0f, 0.0f, 0.0f);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Raise or Lower Height");
return(true);
}
private bool Smooth(Terrain terrain, IOnPaint editContext, Vector2 currUV)
{
// the brush size is relative to the main brush size
float brushSize = editContext.brushSize * this.smoothBrushSize / 100f;
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds());
Material mat = TerrainPaintUtility.GetBuiltinPaintMaterial();
float brushStrength = smoothBrushStrength / 100f; // editContext.brushStrength;
// brushStrength = Event.current.shift ? -brushStrength : brushStrength;
Vector4 brushParams = new Vector4(brushStrength, 0.0f, 0.0f, 0.0f);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, (int)TerrainPaintUtility.BuiltinPaintMaterialPasses.SmoothHeights);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Smooth Height");
return(true);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
float finalTwistAmount = m_TwistAmount * -0.001f; //scale to a reasonable value and negate so default mode is clockwise
if (Event.current.shift)
{
finalTwistAmount *= -1.0f;
}
paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
Material mat = GetPaintMaterial();
Vector4 brushParams = new Vector4(editContext.brushStrength, 0.0f, finalTwistAmount, 0.0f);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Twist Height");
return(false);
}
private bool Smudge(Terrain terrain, IOnPaint editContext, Vector2 currUV, Vector2 prevUV, BrushSettings brushSettings)
{
// the brush size is relative to the main brush size
float brushSize = brushSettings.brushSize * this.smudgeBrushSize / 100f;
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, currUV, brushSize, brushSettings.brushRotationDegrees);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
Vector2 smudgeDir = editContext.uv - prevUV;
paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
Material mat = GetMaterial();
float brushStrength = this.smudgeBrushStrength / 100f;
Vector4 brushParams = new Vector4(brushStrength, smudgeDir.x, smudgeDir.y, 0);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Smudge Height");
return(true);
}
private bool PaintTexture(Terrain terrain, IOnPaint editContext, Vector2 currUV)
{
// the brush size is relative to the main brush size
float brushSize = editContext.brushSize * paintBrushSize / 100f;
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, currUV, brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintTexture(terrain, brushXform.GetBrushXYBounds(), m_SelectedInnerTerrainLayer);
if (paintContext == null)
{
return(false);
}
Material mat = TerrainPaintUtility.GetBuiltinPaintMaterial();
float targetAlpha = 1.0f; // always 1.0 now -- no subtractive painting (we assume this in the ScatterAlphaMap)
float brushStrength = paintBrushStrength / 100f; // editContext.brushStrength
// apply brush
Vector4 brushParams = new Vector4(brushStrength, targetAlpha, 0.0f, 0.0f);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, (int)TerrainPaintUtility.BuiltinPaintMaterialPasses.PaintTexture);
TerrainPaintUtility.EndPaintTexture(paintContext, "Terrain Paint - Texture");
return(true);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
if (splatPaintRules == null)
{
return(false);
}
Material mat = GetPaintMaterial();
mat.SetTexture("_BrushTex", editContext.brushTexture);
// gathering heightmap
BrushTransform brushXformForGatheringHeightmap = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext paintContextForGatheringHeightmap = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXformForGatheringHeightmap.GetBrushXYBounds(), 1);
if (paintContextForGatheringHeightmap == null)
{
return(false);
}
RenderTexture gatheredHeightmap = RenderTexture.GetTemporary(terrain.terrainData.heightmapTexture.descriptor);
Graphics.Blit(paintContextForGatheringHeightmap.sourceRenderTexture, gatheredHeightmap); //, TerrainPaintUtility.GetBlitMaterial(), 0);
TerrainPaintUtility.ReleaseContextResources(paintContextForGatheringHeightmap);
// painting alphamap
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintTexture(terrain, brushXform.GetBrushXYBounds(), m_SelectedTerrainLayer);
if (paintContext == null)
{
return(false);
}
float targetAlpha = 1.0f; // always 1.0 now -- no subtractive painting (we assume this in the ScatterAlphaMap)
Vector4 brushParams = new Vector4(editContext.brushStrength, targetAlpha, splatPaintRules.useHeightTransition ? 1f : 0f, splatPaintRules.useAngleTransition ? 1f : 0f);
Vector4 paintRulesParametersHeight = new Vector4(splatPaintRules.minHeightStart, splatPaintRules.minHeightEnd, splatPaintRules.maxHeightStart, splatPaintRules.maxHeightEnd);
Vector4 paintRulesParametersAngle = new Vector4(splatPaintRules.minAngleStart, splatPaintRules.minAngleEnd, splatPaintRules.maxAngleStart, splatPaintRules.maxAngleEnd);
Vector4 paintRulesInversionAndUsage = new Vector4(splatPaintRules.inverseHeightRule ? 1f : 0f, splatPaintRules.inverseAngleRule ? 1f : 0f, splatPaintRules.applyHeightRule ? 1f : 0f, splatPaintRules.applyAngleRule ? 1f : 0f);
mat.SetVector("_BrushParams", brushParams);
mat.SetVector("_TerrainSize", (Vector4)terrain.terrainData.size);
mat.SetVector("_PaintRulesParametersHeight", paintRulesParametersHeight);
mat.SetVector("_PaintRulesParametersAngle", paintRulesParametersAngle);
mat.SetVector("_PaintRulesInversionAndUsage", paintRulesInversionAndUsage);
mat.SetTexture("_Heightmap", gatheredHeightmap);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintTexture(paintContext, "Terrain Paint - Texture");
RenderTexture.ReleaseTemporary(gatheredHeightmap);
return(true);
}
private bool Bridge(Terrain terrain, IOnPaint editContext, Vector2 currUV, float pct, Vector3 stroke, Vector3 startPoint)
{
float heightOffset = heightProfile.Evaluate(pct) / terrain.terrainData.size.y;
float strengthScale = strengthProfile.Evaluate(pct);
float widthScale = widthProfile.Evaluate(pct);
float finalHeight = (startPoint + pct * stroke).z + heightOffset;
int finalBrushSize = (int)(widthScale * (float)editContext.brushSize);
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, currUV, finalBrushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds());
Material mat = GetMaterial();
Vector4 brushParams = new Vector4();
mat.SetTexture("_BrushTex", editContext.brushTexture);
brushParams.x = editContext.brushStrength * strengthScale;
brushParams.y = 0.5f * finalHeight;
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Bridge");
return(true);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
Rect rect = brushXform.GetBrushXYBounds();
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, rect);
Material mat = GetPaintMaterial();
PaintContext maskContext = null;
if (m_TextureMask || m_TextureStencil)
{
TerrainLayer maskTerrainLayer = terrain.terrainData.terrainLayers[m_TextureMask ? m_maskIndex : m_stencilIndex];
maskContext = TerrainPaintUtility.BeginPaintTexture(terrain, rect, maskTerrainLayer);
if (maskContext == null)
{
return(false);
}
mat.SetTexture("_MaskTex", maskContext.sourceRenderTexture);
}
mat.SetInt("_MaskStencil", m_TextureMask ? 1 : (m_TextureStencil ? 2 : 0));
ApplyBrushInternal(paintContext, editContext.brushStrength, editContext.brushTexture, brushXform, mat);
if (maskContext != null)
{
TerrainPaintUtility.ReleaseContextResources(maskContext);
}
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Masked Terrace Erosion");
return(false);
}
public override void OnSceneGUI(Terrain terrain, IOnSceneGUI editContext)
{
// We're only doing painting operations, early out if it's not a repaint
if (Event.current.type != EventType.Repaint)
{
return;
}
if (editContext.hitValidTerrain)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.raycastHit.textureCoord, editContext.brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
Material material = TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial();
TerrainPaintUtilityEditor.DrawBrushPreview(
paintContext, TerrainPaintUtilityEditor.BrushPreview.SourceRenderTexture, editContext.brushTexture, brushXform, material, 0);
// draw result preview
{
ApplyBrushInternal(paintContext, editContext.brushStrength, editContext.brushTexture, brushXform, terrain);
// restore old render target
RenderTexture.active = paintContext.oldRenderTexture;
material.SetTexture("_HeightmapOrig", paintContext.sourceRenderTexture);
TerrainPaintUtilityEditor.DrawBrushPreview(
paintContext, TerrainPaintUtilityEditor.BrushPreview.DestinationRenderTexture, editContext.brushTexture, brushXform, material, 1);
}
TerrainPaintUtility.ReleaseContextResources(paintContext);
}
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
if (Event.current.type == EventType.MouseDown)
{
m_PrevBrushPos = editContext.uv;
return(false);
}
if (Event.current.type == EventType.MouseDrag && m_PreviousEvent == EventType.MouseDrag)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
Vector2 smudgeDir = editContext.uv - m_PrevBrushPos;
paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
Material mat = GetPaintMaterial();
Vector4 brushParams = new Vector4(editContext.brushStrength, smudgeDir.x, smudgeDir.y, 0);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Smudge Height");
m_PrevBrushPos = editContext.uv;
}
m_PreviousEvent = Event.current.type;
return(false);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
Init();
commonUI.OnPaint(terrain, editContext);
if (commonUI.allowPaint)
{
Vector2 uv = editContext.uv;
if (commonUI.ScatterBrushStamp(ref terrain, ref uv))
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, uv, commonUI.brushSize, commonUI.brushRotation);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds());
float brushStrength = Event.current.control ? -commonUI.brushStrength : commonUI.brushStrength;
Vector3 brushPosWS = WSPosFromTerrainUV(terrain, uv);
ApplyBrushInternal(terrain, paintContext, brushXform, brushPosWS, commonUI.brushRotation,
brushStrength, commonUI.brushSize, editContext.brushTexture);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Noise");
}
}
editContext.Repaint(RepaintFlags.UI);
return(true);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
BrushTransform targetBrushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 1);
Material mat = GetPaintMaterial();
Vector4 brushParams = new Vector4(editContext.brushStrength, 0, 0, 0f);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
Rect targetRect = targetBrushXform.GetBrushXYBounds();
int numSampleTerrainLayers = terrain.terrainData.terrainLayers.Length;
for (int i = 0; i < numSampleTerrainLayers; ++i)
{
TerrainLayer layer = terrain.terrainData.terrainLayers[i];
if (layer == null)
{
continue;
}
int layerIndex = TerrainPaintUtility.FindTerrainLayerIndex(terrain, layer);
Texture2D layerTexture = TerrainPaintUtility.GetTerrainAlphaMapChecked(terrain, layerIndex >> 2);
PaintContext targetContext = PaintContext.CreateFromBounds(terrain, targetRect, layerTexture.width, layerTexture.height);
targetContext.CreateRenderTargets(RenderTextureFormat.R8);
targetContext.GatherAlphamap(layer, true);
Graphics.Blit(targetContext.sourceRenderTexture, targetContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintTexture(targetContext, "Terrain Paint - Smooth Splatmaps");
}
return(false);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
Init();
if (activeMesh == null || Event.current.type != EventType.MouseDown || Event.current.shift == true || m_editTransform)
{
return(false);
}
commonUI.OnPaint(terrain, editContext);
if (commonUI.allowPaint)
{
Texture brushTexture = editContext.brushTexture;
BrushTransform brushTransform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, commonUI.brushSize, commonUI.brushRotation);
PaintContext ctx = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushTransform.GetBrushXYBounds());
ApplyBrushInternal(terrain, ctx, brushTransform);
TerrainPaintUtility.EndPaintHeightmap(ctx, "Mesh Stamp - Stamp Mesh");
}
return(true);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintTexture(terrain, brushXform.GetBrushXYBounds(), m_SelectedTerrainLayer);
if (paintContext == null)
{
return(false);
}
Material mat = TerrainPaintUtility.GetBuiltinPaintMaterial();
// apply brush
float targetAlpha = 1.0f; // always 1.0 now -- no subtractive painting (we assume this in the ScatterAlphaMap)
Vector4 brushParams = new Vector4(editContext.brushStrength, targetAlpha, 0.0f, 0.0f);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, (int)TerrainPaintUtility.BuiltinPaintMaterialPasses.PaintTexture);
TerrainPaintUtility.EndPaintTexture(paintContext, "Terrain Paint - Texture");
return(true);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
Material mat = GetPaintMaterial();
int currentMode = (int)mode;
if (Event.current.control)
{
currentMode *= -1;
}
float modeValue = Mathf.Clamp01(currentMode);
Vector4 brushParams = new Vector4(editContext.brushStrength, 0, modeValue, 0);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Directional Smooth");
return(false);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
float sign = Event.current.shift?-1.0f:1.0f;
return(DoPaint(terrain, editContext.brushStrength * sign, editContext.brushTexture, brushXform));
}
/// <summary>
/// This is the handler that is called when one of the gizmo is moved.
/// </summary>
/// <param name="gizmo">
/// The gizmo that was dragged.
/// </param>
/// <param name="handleId">
/// The id of the handle that is being dragged.
/// </param>
private void OnGizmoDragUpdate(Gizmo gizmo, int handleId)
{
// This is where we want to adjust the position of the TerrainData heights for mesh control points
// and change the terrain height. First, we need to check the drag
// channel. The drag channel informs us about the kind of drag that is
// being applied (offset, rotation or scale). Tt will most
// likely always be offset, but it's safer to always check.
if (gizmo.ActiveDragChannel == GizmoDragChannel.Offset)
{
#if FALSE
Vector3 pos = transform.position;
Vector2 pos2 = new Vector2(pos.x, pos.z);
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(theTerrain, pos2, gcount, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(theTerrain, brushXform.GetBrushXYBounds(), 1);
//float finalPinchAmount = m_PinchAmount * 0.005f; //scale to a reasonable value and negate so default mode is clockwise
//if (Event.current.shift)
//{
// finalPinchAmount *= -1.0f;
//}
paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
Material mat = GetPaintMaterial();
Vector4 brushParams = new Vector4(1.0f, 0.0f, 1.0f /*finalPinchAmount*/, 0.0f);
mat.SetFloatArray("_Brush", grid);
mat.SetFloat("_BrushSize", gcount);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintHeightmap(paintContext, null);
#endif
// We are offsetting the gizmo. Good. Now we need to apply the drag offset to the TerrainData (or mesh control point)
// associated with the gizmo.
// Note: pseudo code to adjust TerrainData heights.
// The gizmo positions and terrain heights don't match up after a gizmo move - this pseudo code is just meant to show the concept.
// Depending on what we come up with, I feel a terrain mesh with vertice control points might be the best method?
// Get the amount of height change from the gizmo move.
switch (interpolation)
{
case Interpolation.Bilinear: UpdateTerrainBilinear(gizmo); break;
case Interpolation.Bicubic: UpdateTerrainBicubic(gizmo); break;
}
// ideally use a mesh instead of TerrainData and change control points? e.g. controlPoint.Position += dragOffset;
// The control point could be moved using the amount of drag that was applied to the gizmo.
// As I mentioned, the the Ogre application I did, the terrain was a mesh generated by creating a spline from control points
// and tessellated into a mesh so the result from the spline was a fairly smooth mesh.
// I'm open to the best method we can come up with that is easy for the user to adjust terrain with and also allow importing
// of control points from 2D CAD data to build the mesh.
}
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds());
ApplyBrushInternal(paintContext, editContext.brushStrength, editContext.brushTexture, brushXform);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Smooth Height");
return(true);
}
protected override bool CalculateTransform(ref Terrain terrain, out BrushTransform brushTransform)
{
Vector2 uv = textureCoordUnderCursor;
float brushSize = uiGroup.brushSize;
float brushRotation = uiGroup.brushRotation;
// TODO: Remove this method and replace the preview with a radius effect and scatter at the correct position...
brushTransform = TerrainPaintUtility.CalculateBrushTransform(terrain, uv, brushSize, brushRotation);
return(true);
}
public override void OnRenderBrushPreview(Terrain terrain, IOnSceneGUI editContext)
{
if (m_MouseOnPatchIndex == -1 && editContext.hitValidTerrain && Event.current.type == EventType.Repaint)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.raycastHit.textureCoord, editContext.brushSize, 0.0f);
PaintContext ctx = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
TerrainPaintUtilityEditor.DrawBrushPreview(ctx, TerrainBrushPreviewMode.SourceRenderTexture, editContext.brushTexture, brushXform, TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial(), 0);
TerrainPaintUtility.ReleaseContextResources(ctx);
}
}
public override void OnSceneGUI(Terrain terrain, IOnSceneGUI editContext)
{
commonUI.OnSceneGUI2D(terrain, editContext);
if (editContext.hitValidTerrain || commonUI.isInUse)
{
commonUI.OnSceneGUI(terrain, editContext);
if (Event.current.type != EventType.Repaint)
{
return;
}
if (pathToolProperties != null && pathToolProperties.widthProfile != null)
{
float endWidth = Mathf.Abs(pathToolProperties.widthProfile.Evaluate(1.0f));
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, commonUI.raycastHitUnderCursor.textureCoord, commonUI.brushSize * endWidth, commonUI.brushRotation);
PaintContext ctx = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
TerrainPaintUtilityEditor.DrawBrushPreview(ctx, TerrainPaintUtilityEditor.BrushPreview.SourceRenderTexture, editContext.brushTexture, brushXform, TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial(), 0);
TerrainPaintUtility.ReleaseContextResources(ctx);
}
}
if (Event.current.type != EventType.Repaint)
{
return;
}
switch (pathToolProperties.paintMode)
{
case PaintMode.Paint:
// nothing to do, no special indicator
break;
case PaintMode.Stroke:
//display a brush preview at first or last clicked path location, using starting size from width profile
if (m_StartTerrain != null)
{
float startWidth = Mathf.Abs(pathToolProperties.widthProfile.Evaluate(0.0f));
BrushTransform brushTransform = TerrainPaintUtility.CalculateBrushTransform(m_StartTerrain, m_StartPoint, commonUI.brushSize * startWidth, commonUI.brushRotation);
PaintContext sampleContext = TerrainPaintUtility.BeginPaintHeightmap(m_StartTerrain, brushTransform.GetBrushXYBounds());
TerrainPaintUtilityEditor.DrawBrushPreview(sampleContext, TerrainPaintUtilityEditor.BrushPreview.SourceRenderTexture,
editContext.brushTexture, brushTransform, TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial(), 0);
TerrainPaintUtility.ReleaseContextResources(sampleContext);
}
break;
default:
throw new System.Exception(string.Format("Unsupported paint mode {0}", pathToolProperties.paintMode));
}
}
public static void ShowDefaultPreviewBrush(Terrain terrain, Texture brushTexture, float brushSize)
{
Ray mouseRay = HandleUtility.GUIPointToWorldRay(Event.current.mousePosition);
RaycastHit hit;
if (terrain.GetComponent <Collider>().Raycast(mouseRay, out hit, Mathf.Infinity))
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, hit.textureCoord, brushSize, 0.0f);
PaintContext ctx = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
DrawBrushPreview(ctx, TerrainPaintUtilityEditor.BrushPreview.SourceRenderTexture, brushTexture, brushXform, GetDefaultBrushPreviewMaterial(), 0);
TerrainPaintUtility.ReleaseContextResources(ctx);
}
}
public virtual bool CalculateBrushTransform(Terrain terrain, Vector2 uv, float size, float rotation, out BrushTransform brushTransform)
{
if (m_UiGroup.ScatterBrushStamp(ref terrain, ref uv))
{
brushTransform = TerrainPaintUtility.CalculateBrushTransform(terrain, uv, size, rotation);
return(true);
}
else
{
brushTransform = new BrushTransform();
return(false);
}
}
/// <summary>Terraces the HeightMap.</summary>
/// <param name="featureSize">The height of each terrace.</param>
/// <param name="interiorCornerWeight">The weight of the terrace effect.</param>
public static void TerraceErodeHeightmap(float featureSize, float interiorCornerWeight)
{
Material mat = new Material((Shader)AssetDatabase.LoadAssetAtPath("Packages/com.unity.terrain-tools/Shaders/TerraceErosion.shader", typeof(Shader)));
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(Land, heightmapCentre, Land.terrainData.size.x, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(Land, brushXform.GetBrushXYBounds());
Vector4 brushParams = new Vector4(1.0f, featureSize, interiorCornerWeight, 0.0f);
mat.SetTexture("_BrushTex", terrainFilterTexture);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Filter - TerraceErosion");
}
override public void OnSceneGUI(Terrain currentTerrain, IOnSceneGUI editContext)
{
Terrain terrain = currentTerrain;
float brushSize = editContext.brushSize;
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.raycastHit.textureCoord, brushSize, 0.0f);
PaintContext ctx = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
Material brushPreviewMat = BrushUtilities.GetDefaultBrushPreviewMaterial();
brushPreviewMat.color = bridgeBrushColor;
BrushUtilities.DrawBrushPreview(ctx, BrushUtilities.BrushPreview.SourceRenderTexture, editContext.brushTexture, brushXform, brushPreviewMat, 0);
TerrainPaintUtility.ReleaseContextResources(ctx);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
if (Event.current.type == EventType.MouseDown)
{
m_PrevBrushPos = editContext.uv;
return(false);
}
if (Event.current.type == EventType.MouseDrag && m_PreviousEvent == EventType.MouseDrag)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
Vector2 smudgeDir = editContext.uv - m_PrevBrushPos;
paintContext.sourceRenderTexture.filterMode = FilterMode.Bilinear;
Material mat = GetPaintMaterial();
PaintContext maskContext = null;
if (m_TextureMask || m_TextureStencil)
{
TerrainLayer maskTerrainLayer = terrain.terrainData.terrainLayers[m_TextureMask ? m_maskIndex : m_stencilIndex];
maskContext = TerrainPaintUtility.BeginPaintTexture(terrain, brushXform.GetBrushXYBounds(), maskTerrainLayer);
if (maskContext == null)
{
return(false);
}
mat.SetTexture("_MaskTex", maskContext.sourceRenderTexture);
}
mat.SetInt("_MaskStencil", m_TextureMask ? 1 : (m_TextureStencil ? 2 : 0));
Vector4 brushParams = new Vector4(editContext.brushStrength, smudgeDir.x, smudgeDir.y, 0);
mat.SetTexture("_BrushTex", editContext.brushTexture);
mat.SetVector("_BrushParams", brushParams);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(paintContext, brushXform, mat);
Graphics.Blit(paintContext.sourceRenderTexture, paintContext.destinationRenderTexture, mat, 0);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Masked Smudge");
if (maskContext != null)
{
TerrainPaintUtility.ReleaseContextResources(maskContext);
}
m_PrevBrushPos = editContext.uv;
}
m_PreviousEvent = Event.current.type;
return(false);
}
public override bool OnPaint(Terrain terrain, IOnPaint editContext)
{
// ignore mouse drags
if (Event.current.type == EventType.MouseDrag)
{
return(true);
}
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.uv, editContext.brushSize, 0.0f);
PaintContext paintContext = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds());
ApplyBrushInternal(paintContext, editContext.brushStrength, editContext.brushTexture, brushXform, terrain, Event.current.shift);
TerrainPaintUtility.EndPaintHeightmap(paintContext, "Terrain Paint - Stamp");
return(true);
}
public void OnSceneGUI(Terrain currentTerrain, IOnSceneGUI editContext, BrushSettings brushSettings)
{
if (m_StartTerrain != null && m_StartPoint != null)
{
// anchor is placed on the start terrain, independent of the active one; needed for multi-tiles
Terrain terrain = m_StartTerrain;
BrushTransform anchorBrushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, m_StartPoint, brushSettings.brushSize, brushSettings.brushRotationDegrees);
PaintContext anchorCtx = TerrainPaintUtility.BeginPaintHeightmap(terrain, anchorBrushXform.GetBrushXYBounds(), 1);
Material brushPreviewMat = BrushUtilities.GetDefaultBrushPreviewMaterial();
brushPreviewMat.color = anchorBrushColor;
BrushUtilities.DrawBrushPreview(anchorCtx, BrushUtilities.BrushPreview.SourceRenderTexture, editContext.brushTexture, anchorBrushXform, brushPreviewMat, 0);
TerrainPaintUtility.ReleaseContextResources(anchorCtx);
}
}
private void DrawBrushPreviews(Terrain terrain, IOnSceneGUI editContext)
{
Vector2 sampleUV;
BrushTransform sampleXform;
PaintContext sampleContext = null;
Material previewMat = Utility.GetDefaultPreviewMaterial();
// draw sample location brush and create context data to be used when drawing target brush previews
if (m_SampleLocation.terrain != null)
{
sampleUV = TerrainUVFromBrushLocation(m_SampleLocation.terrain, m_SampleLocation.pos);
sampleXform = TerrainPaintUtility.CalculateBrushTransform(m_SampleLocation.terrain, sampleUV, commonUI.brushSize, commonUI.brushRotation);
sampleContext = TerrainPaintUtility.BeginPaintHeightmap(m_SampleLocation.terrain, sampleXform.GetBrushXYBounds());
var texelCtx = Utility.CollectTexelValidity(sampleContext.originTerrain, sampleXform.GetBrushXYBounds());
Utility.SetupMaterialForPaintingWithTexelValidityContext(sampleContext, texelCtx, sampleXform, previewMat);
TerrainPaintUtilityEditor.DrawBrushPreview(sampleContext, TerrainBrushPreviewMode.SourceRenderTexture,
editContext.brushTexture, sampleXform, previewMat, 0);
texelCtx.Cleanup();
}
// draw brush preview and mesh preview for current mouse position
if (commonUI.isRaycastHitUnderCursorValid)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, commonUI.raycastHitUnderCursor.textureCoord, commonUI.brushSize, commonUI.brushRotation);
PaintContext ctx = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
var texelCtx = Utility.CollectTexelValidity(ctx.originTerrain, brushXform.GetBrushXYBounds());
Utility.SetupMaterialForPaintingWithTexelValidityContext(ctx, texelCtx, brushXform, previewMat);
TerrainPaintUtilityEditor.DrawBrushPreview(ctx, TerrainBrushPreviewMode.SourceRenderTexture,
editContext.brushTexture, brushXform, previewMat, 0);
if (sampleContext != null && cloneToolProperties.m_PaintHeightmap)
{
ApplyHeightmap(sampleContext, ctx, brushXform, terrain, editContext.brushTexture, commonUI.brushStrength);
RenderTexture.active = ctx.oldRenderTexture;
previewMat.SetTexture("_HeightmapOrig", ctx.sourceRenderTexture);
TerrainPaintUtilityEditor.DrawBrushPreview(ctx, TerrainBrushPreviewMode.DestinationRenderTexture,
editContext.brushTexture, brushXform, previewMat, 1);
}
// Restores RenderTexture.active
ctx.Cleanup();
texelCtx.Cleanup();
}
// Restores RenderTexture.active
sampleContext?.Cleanup();
}
public override void OnSceneGUI(Terrain terrain, IOnSceneGUI editContext)
{
// We're only doing painting operations, early out if it's not a repaint
if (Event.current.type != EventType.Repaint)
{
return;
}
if (editContext.hitValidTerrain)
{
BrushTransform brushXform = TerrainPaintUtility.CalculateBrushTransform(terrain, editContext.raycastHit.textureCoord, editContext.brushSize, 0.0f);
PaintContext ctx = TerrainPaintUtility.BeginPaintHeightmap(terrain, brushXform.GetBrushXYBounds(), 1);
TerrainPaintUtilityEditor.DrawBrushPreview(ctx, TerrainPaintUtilityEditor.BrushPreview.SourceRenderTexture, editContext.brushTexture, brushXform, TerrainPaintUtilityEditor.GetDefaultBrushPreviewMaterial(), 0);
TerrainPaintUtility.ReleaseContextResources(ctx);
}
}