GPencil: Include new Brush random curves

Now the brushes have several new random settings and use curves to define the effect. The curves have been moved below the parameter to keep UI standards and extra curve panels have been removed.

{F8505387}

The new curves are:

* Hue.
* Saturation.
* Value.

New option to random at stroke level instead to random at point level for the following values:

* Thickness.
* Strength.
* UV.
* Hue.
* Saturation.
* Value.

Curves have been moved below the corresponding parameter and only are displayed in properties panel. Display the curves in the popover made it unusable.

{F8505392}

Also, the Pressure random has been renamed to Radius because the old name was not clear enough.

Reviewed By: mendio, pablovazquez

Differential Revision: https://developer.blender.org/D7577

1 files changed, 15 insertions, 0 deletions

diff --git a/source/blender/editors/gpencil/gpencil_intern.h b/source/blender/editors/gpencil/gpencil_intern.h
index 19b53d0662d..a98ccb1cba6 100644
--- a/source/blender/editors/gpencil/gpencil_intern.h
+++ b/source/blender/editors/gpencil/gpencil_intern.h
@@ -68,6 +68,17 @@ struct PropertyRNA;
 
 /* Internal Operator-State Data ------------------------ */
 
+/** Random settings by stroke */
+typedef struct GpRandomSettings {
+  /** Pressure used for evaluated curves. */
+  float pen_press;
+
+  float hsv[3];
+  float pressure;
+  float strength;
+  float uv;
+} GpRandomSettings;
+
 /* Temporary draw data (no draw manager mode) */
 typedef struct tGPDdraw {
   struct RegionView3D *rv3d;   /* region to draw */
@@ -230,6 +241,10 @@ typedef struct tGPDprimitive {
 
   /** size in pixels for uv calculation */
   float totpixlen;
+
+  /** Random settings by stroke */
+  GpRandomSettings random_settings;
+
 } tGPDprimitive;
 
 /* Modal Operator Drawing Callbacks ------------------------ */