void OnSceneGUI()
{
//Note: for each handle to be independent when multi-selecting DensityVolume,
//We cannot rely hereon SerializedDensityVolume which is the collection of
//selected DensityVolume. Thus code is almost the same of the UI.
DensityVolume densityVolume = target as DensityVolume;
switch (EditMode.editMode)
{
case k_EditBlend:
using (new Handles.DrawingScope(Matrix4x4.TRS(densityVolume.transform.position, densityVolume.transform.rotation, Vector3.one)))
{
//contained must be initialized in all case
s_ShapeBox.center = Vector3.zero;
s_ShapeBox.size = densityVolume.parameters.size;
Color baseColor = densityVolume.parameters.albedo;
baseColor.a = 8 / 255f;
s_BlendBox.baseColor = baseColor;
s_BlendBox.monoHandle = !densityVolume.parameters.m_EditorAdvancedFade;
s_BlendBox.center = CenterBlendLocalPosition(densityVolume);
s_BlendBox.size = BlendSize(densityVolume);
EditorGUI.BeginChangeCheck();
s_BlendBox.DrawHandle();
if (EditorGUI.EndChangeCheck())
{
Undo.RecordObject(densityVolume, "Change Density Volume Blend");
if (densityVolume.parameters.m_EditorAdvancedFade)
{
//work in local space to compute the change on positiveFade and negativeFade
Vector3 newCenterBlendLocalPosition = s_BlendBox.center;
Vector3 halfSize = s_BlendBox.size * 0.5f;
Vector3 size = densityVolume.parameters.size;
Vector3 posFade = newCenterBlendLocalPosition + halfSize;
posFade.x = 0.5f - posFade.x / size.x;
posFade.y = 0.5f - posFade.y / size.y;
posFade.z = 0.5f - posFade.z / size.z;
Vector3 negFade = newCenterBlendLocalPosition - halfSize;
negFade.x = 0.5f + negFade.x / size.x;
negFade.y = 0.5f + negFade.y / size.y;
negFade.z = 0.5f + negFade.z / size.z;
densityVolume.parameters.m_EditorPositiveFade = posFade;
densityVolume.parameters.m_EditorNegativeFade = negFade;
}
else
{
float uniformDistance = (s_ShapeBox.size.x - s_BlendBox.size.x) * 0.5f;
float max = Mathf.Min(s_ShapeBox.size.x, s_ShapeBox.size.y, s_ShapeBox.size.z) * 0.5f;
densityVolume.parameters.m_EditorUniformFade = Mathf.Clamp(uniformDistance, 0f, max);
}
}
}
break;
case k_EditShape:
//important: if the origin of the handle's space move along the handle,
//handles displacement will appears as moving two time faster.
using (new Handles.DrawingScope(Matrix4x4.TRS(Vector3.zero, densityVolume.transform.rotation, Vector3.one)))
{
//contained must be initialized in all case
s_ShapeBox.center = Quaternion.Inverse(densityVolume.transform.rotation) * densityVolume.transform.position;
s_ShapeBox.size = densityVolume.parameters.size;
Vector3 previousSize = densityVolume.parameters.size;
Vector3 previousPositiveFade = densityVolume.parameters.m_EditorPositiveFade;
Vector3 previousNegativeFade = densityVolume.parameters.m_EditorNegativeFade;
EditorGUI.BeginChangeCheck();
s_ShapeBox.DrawHandle();
if (EditorGUI.EndChangeCheck())
{
Undo.RecordObjects(new Object[] { densityVolume, densityVolume.transform }, "ChangeDensity Volume Bounding Box");
Vector3 newSize = s_ShapeBox.size;
densityVolume.parameters.size = newSize;
Vector3 newPositiveFade = new Vector3(
newSize.x < 0.00001 ? 0 : previousPositiveFade.x * previousSize.x / newSize.x,
newSize.y < 0.00001 ? 0 : previousPositiveFade.y * previousSize.y / newSize.y,
newSize.z < 0.00001 ? 0 : previousPositiveFade.z * previousSize.z / newSize.z
);
Vector3 newNegativeFade = new Vector3(
newSize.x < 0.00001 ? 0 : previousNegativeFade.x * previousSize.x / newSize.x,
newSize.y < 0.00001 ? 0 : previousNegativeFade.y * previousSize.y / newSize.y,
newSize.z < 0.00001 ? 0 : previousNegativeFade.z * previousSize.z / newSize.z
);
for (int axeIndex = 0; axeIndex < 3; ++axeIndex)
{
if (newPositiveFade[axeIndex] + newNegativeFade[axeIndex] > 1)
{
float overValue = (newPositiveFade[axeIndex] + newNegativeFade[axeIndex] - 1f) * 0.5f;
newPositiveFade[axeIndex] -= overValue;
newNegativeFade[axeIndex] -= overValue;
if (newPositiveFade[axeIndex] < 0)
{
newNegativeFade[axeIndex] += newPositiveFade[axeIndex];
newPositiveFade[axeIndex] = 0f;
}
if (newNegativeFade[axeIndex] < 0)
{
newPositiveFade[axeIndex] += newNegativeFade[axeIndex];
newNegativeFade[axeIndex] = 0f;
}
}
}
densityVolume.parameters.m_EditorPositiveFade = newPositiveFade;
densityVolume.parameters.m_EditorNegativeFade = newNegativeFade;
//update normal mode blend
float max = Mathf.Min(newSize.x, newSize.y, newSize.z) * 0.5f;
float newUniformFade = Mathf.Clamp(densityVolume.parameters.m_EditorUniformFade, 0f, max);
densityVolume.parameters.m_EditorUniformFade = newUniformFade;
//update engine used percents
if (densityVolume.parameters.m_EditorAdvancedFade)
{
densityVolume.parameters.positiveFade = newPositiveFade;
densityVolume.parameters.negativeFade = newNegativeFade;
}
else
{
densityVolume.parameters.positiveFade =
densityVolume.parameters.negativeFade =
new Vector3(
newSize.x > 0.00001 ? (newSize.x - newUniformFade) / newSize.x : 0f,
newSize.y > 0.00001 ? (newSize.y - newUniformFade) / newSize.y : 0f,
newSize.z > 0.00001 ? (newSize.z - newUniformFade) / newSize.z : 0f
);
}
Vector3 delta = densityVolume.transform.rotation * s_ShapeBox.center - densityVolume.transform.position;
densityVolume.transform.position += delta;
}
}
break;
}
}
void OnSceneGUI()
{
DensityVolume densityVolume = target as DensityVolume;
HierarchicalBox shapeBox = shapeBoxes[densityVolume];
HierarchicalBox blendBox = blendBoxes[densityVolume];
switch (EditMode.editMode)
{
case k_EditBlend:
using (new Handles.DrawingScope(Matrix4x4.TRS(densityVolume.transform.position, densityVolume.transform.rotation, Vector3.one)))
{
//contained must be initialized in all case
shapeBox.center = Vector3.zero;
shapeBox.size = densityVolume.parameters.size;
blendBox.monoHandle = !densityVolume.parameters.advancedFade;
blendBox.center = CenterBlendLocalPosition(densityVolume);
blendBox.size = BlendSize(densityVolume);
EditorGUI.BeginChangeCheck();
blendBox.DrawHandle();
if (EditorGUI.EndChangeCheck())
{
Undo.RecordObject(densityVolume, "Change Density Volume Blend");
//work in local space to compute the change on positiveFade and negativeFade
Vector3 newCenterBlendLocalPosition = blendBox.center;
Vector3 halfSize = blendBox.size * 0.5f;
Vector3 size = densityVolume.parameters.size;
Vector3 posFade = newCenterBlendLocalPosition + halfSize;
posFade.x = 0.5f - posFade.x / size.x;
posFade.y = 0.5f - posFade.y / size.y;
posFade.z = 0.5f - posFade.z / size.z;
Vector3 negFade = newCenterBlendLocalPosition - halfSize;
negFade.x = 0.5f + negFade.x / size.x;
negFade.y = 0.5f + negFade.y / size.y;
negFade.z = 0.5f + negFade.z / size.z;
densityVolume.parameters.positiveFade = posFade;
densityVolume.parameters.negativeFade = negFade;
}
}
break;
case k_EditShape:
//important: if the origin of the handle's space move along the handle,
//handles displacement will appears as moving two time faster.
using (new Handles.DrawingScope(Matrix4x4.TRS(Vector3.zero, densityVolume.transform.rotation, Vector3.one)))
{
//contained must be initialized in all case
shapeBox.center = Quaternion.Inverse(densityVolume.transform.rotation) * densityVolume.transform.position;
shapeBox.size = densityVolume.parameters.size;
shapeBox.monoHandle = !densityVolume.parameters.advancedFade;
EditorGUI.BeginChangeCheck();
shapeBox.DrawHandle();
if (EditorGUI.EndChangeCheck())
{
Undo.RecordObjects(new Object[] { densityVolume, densityVolume.transform }, "ChangeDensity Volume Bounding Box");
densityVolume.parameters.size = shapeBox.size;
Vector3 delta = densityVolume.transform.rotation * shapeBox.center - densityVolume.transform.position;
densityVolume.transform.position += delta;;
}
}
break;
}
}
