public void DrawPreview(CosineGradient grad)
{
_material.SetVector("_CoeffsA", grad.coeffsA);
_material.SetVector("_CoeffsB", grad.coeffsB);
_material.SetVector("_CoeffsC", grad.coeffsC2);
_material.SetVector("_CoeffsD", grad.coeffsD2);
EditorGUI.DrawPreviewTexture(
GUILayoutUtility.GetRect(128, 32),
EditorGUIUtility.whiteTexture, _material
);
}
public void DrawPreview(CosineGradient grad)
{
if (_material == null)
{
_material = new Material(Shader.Find(PreviewShaderName));
_material.hideFlags = HideFlags.DontSave;
}
_material.SetMatrix("_Gradient", grad);
EditorGUI.DrawPreviewTexture
(_rect, EditorGUIUtility.whiteTexture, _material);
}
public void DrawGraph(CosineGradient grad)
{
_rectGraph = GUILayoutUtility.GetRect(128, 80);
// Background
DrawRect(0, 0, 1, 1, 0.1f, 0.4f);
// Horizontal line
var lineColor = Color.white * 0.4f;
DrawLine(0, 0.5f, 1, 0.5f, lineColor);
// Vertical lines
DrawLine(0.25f, 0, 0.25f, 1, lineColor);
DrawLine(0.50f, 0, 0.50f, 1, lineColor);
DrawLine(0.75f, 0, 0.75f, 1, lineColor);
// R/G/B curves
DrawGradientCurve(grad.redCoeffs, Color.red);
DrawGradientCurve(grad.greenCoeffs, Color.green);
DrawGradientCurve(grad.blueCoeffs, Color.blue);
}
OnGUI(Rect rect, SerializedProperty prop, GUIContent label)
{
// Graph drawer object lazy initialization
if (_graph == null)
{
_graph = new CosineGradientGraphDrawer();
}
// -- Data retrieval
// RGB component properties
var rprop = prop.FindPropertyRelative("R");
var gprop = prop.FindPropertyRelative("G");
var bprop = prop.FindPropertyRelative("B");
// RGB component values
var rvalue = ReadFloat4AsVector4(rprop);
var gvalue = ReadFloat4AsVector4(gprop);
var bvalue = ReadFloat4AsVector4(bprop);
// Gradient reconstruction
var gradient = new CosineGradient
{
R = rvalue, G = gvalue, B = bvalue
};
// -- GUI
// Basic constants
var labelWidth = EditorGUIUtility.labelWidth;
var lineHeight = EditorGUIUtility.singleLineHeight;
var lineSpace = EditorGUIUtility.standardVerticalSpacing;
// Draw the prefix label.
rect.height = lineHeight;
EditorGUI.LabelField(rect, label);
// Calculate the graph area.
rect.x += labelWidth;
rect.width -= labelWidth;
rect.height = lineHeight * 2 + lineSpace;
_graph.SetRect(rect);
// Graph: Background
_graph.DrawPreview(gradient);
// Graph: Horizontal line
var lineColor = Color.white * 0.4f;
//_graph.DrawLine(0, 0, 1, 0, lineColor);
_graph.DrawLine(0, 0.5f, 1, 0.5f, lineColor);
//_graph.DrawLine(0, 1, 1, 1, lineColor);
// Graph: Vertical lines
//_graph.DrawLine( 0, 0, 0, 1, lineColor);
_graph.DrawLine(0.25f, 0, 0.25f, 1, lineColor);
_graph.DrawLine(0.50f, 0, 0.50f, 1, lineColor);
_graph.DrawLine(0.75f, 0, 0.75f, 1, lineColor);
//_graph.DrawLine( 1, 0, 1, 1, lineColor);
// Graph: R/G/B curves
_graph.DrawGradientCurve(rvalue, Color.red);
_graph.DrawGradientCurve(gvalue, Color.green);
_graph.DrawGradientCurve(bvalue, Color.blue);
// Calculate the field edit area.
rect.height = lineHeight;
rect.y += lineHeight * 2 + lineSpace * 2;
// Minimize the label width.
EditorGUIUtility.labelWidth = 12;
// Cancel indentation.
var indent = EditorGUI.indentLevel;
EditorGUI.indentLevel = 0;
// Red
EditorGUI.PropertyField(rect, rprop, GUIContent.none);
rect.y += lineHeight + lineSpace;
// Green
EditorGUI.PropertyField(rect, gprop, GUIContent.none);
rect.y += lineHeight + lineSpace;
// Blue
EditorGUI.PropertyField(rect, bprop, GUIContent.none);
// Recover the original label width and indent level.
EditorGUIUtility.labelWidth = labelWidth;
EditorGUI.indentLevel = indent;
}
