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Debug visualize SDF using high contrast colors #18

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Debug visualize SDF using high contrast colors #18

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12 changes: 11 additions & 1 deletion Editor/SDFTexture.shader
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,8 @@

#define COLOR_POS 1
#define COLOR_NEG float3(0.72, 0, 1)

int _HighContrast;

v2f vert(appdata v)
{
Expand All @@ -51,7 +53,15 @@
uvw = float3(i.texcoord.x, _Z, i.texcoord.y);

float dist = tex3D(_SDF, uvw).r * _DistanceScale;
float3 color = dist > 0.0 ? dist * COLOR_POS : -dist * COLOR_NEG;
float3 color;
if(_HighContrast == 1)
{
color = dist > 0.0 ? float3(1, 1, 1) : float3(0, 0, 0);
}
else
{
color = dist > 0.0 ? dist * COLOR_POS : -dist * COLOR_NEG;
}
return float4(color, 1);
}
ENDHLSL
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5 changes: 5 additions & 0 deletions Editor/SDFTextureEditor.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@ enum Axis { X, Y, Z }
static Material s_Material;
static float s_Slice = 0.5f; // [0, 1]
static Axis s_Axis = Axis.X;
static bool s_HighContrast = false;

SerializedProperty m_SDF;
SerializedProperty m_Size;
Expand All @@ -22,6 +23,7 @@ static class Uniforms
internal static int _Mode = Shader.PropertyToID("_Mode");
internal static int _Axis = Shader.PropertyToID("_Axis");
internal static int _DistanceScale = Shader.PropertyToID("_DistanceScale");
internal static int _HighContrast = Shader.PropertyToID("_HighContrast");
}

void OnEnable()
Expand Down Expand Up @@ -96,6 +98,7 @@ static void DoSDFSlice(Matrix4x4 matrix, Camera camera, Vector3Int voxelResoluti
s_Material.SetVector("_VoxelResolution", new Vector4(voxelResolution.x, voxelResolution.y, voxelResolution.z));
s_Material.SetFloat(Uniforms._DistanceScale, distanceScale);
s_Material.SetTexture("_SDF", sdf);
s_Material.SetInt(Uniforms._HighContrast, s_HighContrast ? 1 : 0);

s_Material.SetPass(0);
Graphics.DrawMeshNow(s_Quad, matrix);
Expand Down Expand Up @@ -183,6 +186,8 @@ Rect GetColumnRect(Rect totalRect, int column)
s_Slice = slice;
SceneView.lastActiveSceneView?.Repaint();
}

s_HighContrast = EditorGUILayout.Toggle(new GUIContent("High Contrast", "Draw SDF visualisation using high contrast colors."), s_HighContrast);
}

bool HasFrameBounds()
Expand Down