private void UpdateTexture()
{
// create preview RT here and keep until the next Repaint
if (m_previewRT != null)
{
RenderTexture.ReleaseTemporary(m_previewRT);
}
NoiseSettings noiseSettings = m_serializedNoise.targetObject as NoiseSettings;
m_previewRT = RenderTexture.GetTemporary(512, 512, 0, NoiseUtils.previewFormat);
RenderTexture tempRT = RenderTexture.GetTemporary(512, 512, 0, NoiseUtils.singleChannelFormat);
RenderTexture prevActive = RenderTexture.active;
NoiseUtils.Blit2D(noiseSettings, tempRT);
NoiseUtils.BlitPreview2D(tempRT, m_previewRT);
RenderTexture.active = prevActive;
RenderTexture.ReleaseTemporary(tempRT);
m_image.image = m_previewRT;
}
/// <summary>
/// Renders an interactive Noise Preview along with tooltip icons and an optional Export button that opens a new ExportNoiseWindow.
/// A background image is also rendered behind the preview that takes up the entire width of the EditorWindow currently being drawn.
/// </summary>
/// <param name = "minSize"> Minimum size for the Preview </param>
/// <param name = "showExportButton"> Whether or not to render the Export button </param>
public void DrawPreviewTexture(float minSize, bool showExportButton = true)
{
// Draw label with tooltip
GUILayout.Label(Styles.noisePreview);
float padding = 4f;
float iconWidth = 40f;
int size = (int)Mathf.Min(minSize, EditorGUIUtility.currentViewWidth);
Rect totalRect = GUILayoutUtility.GetRect(EditorGUIUtility.currentViewWidth, size + padding * 2); // extra pixels for highlight border
Color prev = GUI.color;
GUI.color = new Color(.15f, .15f, .15f, 1f);
GUI.DrawTexture(totalRect, Texture2D.whiteTexture, ScaleMode.StretchToFill, false);
GUI.color = Color.white;
// draw info icon
// if(totalRect.Contains(Event.current.mousePosition))
{
Rect infoIconRect = new Rect(totalRect.x + padding, totalRect.y + padding, iconWidth, iconWidth);
GUI.Label(infoIconRect, Styles.infoIcon);
// GUI.Label( infoIconRect, Styles.noiseTooltip );
}
// draw export button
float buttonWidth = GUI.skin.button.CalcSize(Styles.export).x;
float buttonHeight = EditorGUIUtility.singleLineHeight;
Rect exportRect = new Rect(totalRect.xMax - buttonWidth - padding, totalRect.yMax - buttonHeight - padding, buttonWidth, buttonHeight);
if (GUI.Button(exportRect, Styles.export))
{
serializedNoise.ApplyModifiedProperties();
serializedNoise.Update();
ExportNoiseWindow.ShowWindow(serializedNoise.targetObject as NoiseSettings);
}
float safeSpace = Mathf.Max(iconWidth * 2, buttonWidth * 2) + padding * 4;
float minWidth = Mathf.Min(size, totalRect.width - safeSpace);
Rect previewRect = new Rect(totalRect.x + totalRect.width / 2 - minWidth / 2, totalRect.y + totalRect.height / 2 - minWidth / 2, minWidth, minWidth);
EditorGUIUtility.AddCursorRect(previewRect, MouseCursor.Pan);
if (previewRect.Contains(Event.current.mousePosition))
{
serializedNoise.Update();
HandlePreviewTextureInput(previewRect);
serializedNoise.ApplyModifiedProperties();
}
if (Event.current.type == EventType.Repaint)
{
RenderTexture prevActive = RenderTexture.active;
// create preview RT here and keep until the next Repaint
var previewRT = RenderTexture.GetTemporary(512, 512, 0, NoiseUtils.previewFormat);
NoiseSettings noiseSettings = serializedNoise.targetObject as NoiseSettings;
RenderTexture tempRT = RenderTexture.GetTemporary(512, 512, 0, NoiseUtils.singleChannelFormat);
NoiseUtils.Blit2D(noiseSettings, tempRT);
NoiseUtils.BlitPreview2D(tempRT, previewRT);
RenderTexture.active = prevActive;
GUI.DrawTexture(previewRect, previewRT, ScaleMode.ScaleToFit, false);
RenderTexture.ReleaseTemporary(tempRT);
RenderTexture.ReleaseTemporary(previewRT);
}
GUI.color = prev;
}
private void ApplyBrushInternal(Terrain terrain, PaintContext ctx, BrushTransform brushTransform)
{
Init();
m_rtCollection.ReleaseRTHandles();
m_rtCollection.GatherRTHandles(ctx.sourceRenderTexture.width, ctx.sourceRenderTexture.height, 16);
Graphics.Blit(ctx.sourceRenderTexture, m_rtCollection[RenderTextureIDs.sourceHeight]);
Material mat = GetMaterial();
var brushMask = RTUtils.GetTempHandle(ctx.sourceRenderTexture.width, ctx.sourceRenderTexture.height, 0, FilterUtility.defaultFormat);
Utility.SetFilterRT(commonUI, ctx.sourceRenderTexture, brushMask, mat);
Matrix4x4 toolMatrix = Matrix4x4.TRS(Vector3.zero, toolSettings.rotation, toolSettings.scale);
Bounds modelBounds = activeMesh.bounds;
float maxModelScale = Mathf.Max(Mathf.Max(modelBounds.size.x, modelBounds.size.y), modelBounds.size.z);
// maxModelScale *= Mathf.Sqrt( 2 + maxModelScale * maxModelScale / 4 ) * .5f; // mult so the mesh fits a little better within the camera / stamp texture bounds
// maxModelScale /= 1.414f;
float x = .5f;
float y = .5f;
float xy = Mathf.Sqrt(x * x + y * y);
float z = .5f;
float xyz = Mathf.Sqrt(xy * xy + z * z);
maxModelScale *= xyz;
// build the model matrix to transform the mesh with. we want to scale it to fit in the brush bounds and also center it in the brush bounds
Matrix4x4 model = toolMatrix * Matrix4x4.Scale(Vector3.one / maxModelScale) * Matrix4x4.Translate(-modelBounds.center);
// get the world bounds here so we can calculate the needed offset along the up axis
// Bounds worldBounds = MeshUtility.TransformBounds( model, activeMesh.bounds );
// float localHeightOffset = Mathf.Min( worldBounds.extents.y, toolSettings.stampHeight / brushUI.terrainUnderCursor.terrainData.size.y * .5f );
// Matrix4x4 localHeightOffsetMatrix = Matrix4x4.Translate( Vector3.up * localHeightOffset );
// apply the local height offset
// model = localHeightOffsetMatrix * model;
Vector3 translate = Vector3.up * (toolSettings.stampHeight) / commonUI.terrainUnderCursor.terrainData.size.y;
// translate = translate / brushUI.brushStrength * .5f;
model = Matrix4x4.Translate(translate) * model;
// actually render the mesh to texture to be used with the tool shader
MeshUtils.RenderTopdownProjection(activeMesh, model,
m_rtCollection[RenderTextureIDs.meshStamp],
MeshUtils.defaultProjectionMaterial,
MeshUtils.ShaderPass.Height);
// this doesn't actually apply any noise to the destination RT but will color the destination RT based on whether the fragment values are (+) or (-)
NoiseUtils.BlitPreview2D(m_rtCollection[RenderTextureIDs.meshStamp], m_rtCollection[RenderTextureIDs.meshStampPreview]);
// generate a mask for the mesh to be used in the compositing shader
MeshUtils.RenderTopdownProjection(activeMesh, model,
m_rtCollection[RenderTextureIDs.meshStampMask],
MeshUtils.defaultProjectionMaterial,
MeshUtils.ShaderPass.Mask);
// perform actual composite of mesh stamp and terrain source heightmap
float brushStrength = Event.current.control ? -commonUI.brushStrength : commonUI.brushStrength;
Vector4 brushParams = new Vector4(brushStrength, toolSettings.blendAmount, (commonUI.raycastHitUnderCursor.point.y - commonUI.terrainUnderCursor.GetPosition().y) / commonUI.terrainUnderCursor.terrainData.size.y * .5f, toolSettings.stampHeight / commonUI.terrainUnderCursor.terrainData.size.y * .5f);
mat.SetVector("_BrushParams", brushParams);
mat.SetTexture("_MeshStampTex", m_rtCollection[RenderTextureIDs.meshStamp]);
mat.SetTexture("_MeshMaskTex", m_rtCollection[RenderTextureIDs.meshStampMask]);
mat.SetFloat("_TerrainHeight", commonUI.terrainUnderCursor.terrainData.size.y);
TerrainPaintUtility.SetupTerrainToolMaterialProperties(ctx, brushTransform, mat);
Graphics.Blit(ctx.sourceRenderTexture, ctx.destinationRenderTexture, mat, 0);
Graphics.Blit(ctx.destinationRenderTexture, m_rtCollection[RenderTextureIDs.combinedHeight]);
// restore old render target
RenderTexture.active = ctx.oldRenderTexture;
RTUtils.Release(brushMask);
}