[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [48362] trunk/blender: Basic snapping in node transform operator.

[Lukas Toenne]

Revision: 48362
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=48362
Author:   lukastoenne
Date:     2012-06-28 08:47:22 +0000 (Thu, 28 Jun 2012)
Log Message:
-----------
Basic snapping in node transform operator.

Snapping actually was working already, but grid spacing was set to 1.0, which is basically pixel size in the node editor. Increased this to 1x grid step for fine snapping and 5x grid step for rough snapping.

Grid drawing in node editor now draws 2 levels in slightly different shades to indicate the different snapping modes better.

Node editor also supports the general use_snap tool setting to enable automatic snapping during transform. For now only the incremental snapping is supported, in future could be extended to enable alignment between nodes in a number of ways.

Modified Paths:
--------------
    trunk/blender/release/scripts/startup/bl_ui/space_node.py
    trunk/blender/source/blender/editors/include/UI_view2d.h
    trunk/blender/source/blender/editors/interface/view2d.c
    trunk/blender/source/blender/editors/space_node/node_draw.c
    trunk/blender/source/blender/editors/transform/transform.c
    trunk/blender/source/blender/editors/transform/transform_snap.c

Modified: trunk/blender/release/scripts/startup/bl_ui/space_node.py
===================================================================
--- trunk/blender/release/scripts/startup/bl_ui/space_node.py	2012-06-28 08:17:28 UTC (rev 48361)
+++ trunk/blender/release/scripts/startup/bl_ui/space_node.py	2012-06-28 08:47:22 UTC (rev 48362)
@@ -32,6 +32,7 @@
         snode = context.space_data
         snode_id = snode.id
         id_from = snode.id_from
+        toolsettings = context.tool_settings
 
         row = layout.row(align=True)
         row.template_header()
@@ -86,6 +87,10 @@
 
         layout.separator()
 
+        # Snap
+        row = layout.row(align=True)
+        row.prop(toolsettings, "use_snap", text="")
+
         layout.template_running_jobs()
 
 

Modified: trunk/blender/source/blender/editors/include/UI_view2d.h
===================================================================
--- trunk/blender/source/blender/editors/include/UI_view2d.h	2012-06-28 08:17:28 UTC (rev 48361)
+++ trunk/blender/source/blender/editors/include/UI_view2d.h	2012-06-28 08:47:22 UTC (rev 48362)
@@ -166,6 +166,7 @@
 View2DGrid *UI_view2d_grid_calc(struct Scene *scene, struct View2D *v2d, short xunits, short xclamp, short yunits, short yclamp, int winx, int winy);
 void UI_view2d_grid_draw(struct View2D *v2d, View2DGrid *grid, int flag);
 void UI_view2d_constant_grid_draw(struct View2D *v2d);
+void UI_view2d_multi_grid_draw(struct View2D *v2d, float step, int level_size, int totlevels);
 void UI_view2d_grid_size(View2DGrid *grid, float *r_dx, float *r_dy);
 void UI_view2d_grid_free(View2DGrid *grid);
 

Modified: trunk/blender/source/blender/editors/interface/view2d.c
===================================================================
--- trunk/blender/source/blender/editors/interface/view2d.c	2012-06-28 08:17:28 UTC (rev 48361)
+++ trunk/blender/source/blender/editors/interface/view2d.c	2012-06-28 08:47:22 UTC (rev 48362)
@@ -1328,6 +1328,54 @@
 	glEnd();
 }
 
+/* Draw a multi-level grid in given 2d-region */
+void UI_view2d_multi_grid_draw(View2D *v2d, float step, int level_size, int totlevels)
+{
+	int offset = -10;
+	float lstep = step;
+	int level;
+	
+	for (level = 0; level < totlevels; ++level) {
+		int i;
+		float start;
+		
+		UI_ThemeColorShade(TH_BACK, offset);
+		
+		i = (v2d->cur.xmin >= 0.0f ? -(int)(-v2d->cur.xmin / lstep) : (int)(v2d->cur.xmin / lstep));
+		start = i * lstep;
+		
+		glBegin(GL_LINES);
+		for (; start < v2d->cur.xmax; start += lstep, ++i) {
+			if (i == 0 || (level < totlevels-1 && i % level_size == 0))
+				continue;
+			glVertex2f(start, v2d->cur.ymin);
+			glVertex2f(start, v2d->cur.ymax);
+		}
+		
+		i = (v2d->cur.ymin >= 0.0f ? -(int)(-v2d->cur.ymin / lstep) : (int)(v2d->cur.ymin / lstep));
+		start = i * lstep;
+		
+		for (; start < v2d->cur.ymax; start += lstep, ++i) {
+			if (i == 0 || (level < totlevels-1 && i % level_size == 0))
+				continue;
+			glVertex2f(v2d->cur.xmin, start);
+			glVertex2f(v2d->cur.xmax, start);
+		}
+		
+		/* X and Y axis */
+		UI_ThemeColorShade(TH_BACK, offset-8);
+		glVertex2f(0.0f, v2d->cur.ymin);
+		glVertex2f(0.0f, v2d->cur.ymax);
+		glVertex2f(v2d->cur.xmin, 0.0f);
+		glVertex2f(v2d->cur.xmax, 0.0f);
+		
+		glEnd();
+		
+		lstep *= level_size;
+		offset -= 6;
+	}
+}
+
 /* the price we pay for not exposting structs :( */
 void UI_view2d_grid_size(View2DGrid *grid, float *r_dx, float *r_dy)
 {

Modified: trunk/blender/source/blender/editors/space_node/node_draw.c
===================================================================
--- trunk/blender/source/blender/editors/space_node/node_draw.c	2012-06-28 08:17:28 UTC (rev 48361)
+++ trunk/blender/source/blender/editors/space_node/node_draw.c	2012-06-28 08:47:22 UTC (rev 48362)
@@ -1095,7 +1095,9 @@
 	snode->aspect= (v2d->cur.xmax - v2d->cur.xmin)/((float)ar->winx);
 	// XXX snode->curfont= uiSetCurFont_ext(snode->aspect);
 
-	UI_view2d_constant_grid_draw(v2d);
+	/* grid */
+	UI_view2d_multi_grid_draw(v2d, 25.0f, 5, 2);
+
 	/* backdrop */
 	draw_nodespace_back_pix(ar, snode, color_manage);
 	

Modified: trunk/blender/source/blender/editors/transform/transform.c
===================================================================
--- trunk/blender/source/blender/editors/transform/transform.c	2012-06-28 08:17:28 UTC (rev 48361)
+++ trunk/blender/source/blender/editors/transform/transform.c	2012-06-28 08:47:22 UTC (rev 48362)
@@ -3542,6 +3542,11 @@
 		t->snap[1] = 0.125f;
 		t->snap[2] = 0.0625f;
 	}
+	else if (t->spacetype == SPACE_NODE) {
+		t->snap[0] = 0.0f;
+		t->snap[1] = 125.0f;
+		t->snap[2] = 25.0f;
+	}
 	else {
 		t->snap[0] = 0.0f;
 		t->snap[1] = t->snap[2] = 1.0f;

Modified: trunk/blender/source/blender/editors/transform/transform_snap.c
===================================================================
--- trunk/blender/source/blender/editors/transform/transform_snap.c	2012-06-28 08:17:28 UTC (rev 48361)
+++ trunk/blender/source/blender/editors/transform/transform_snap.c	2012-06-28 08:47:22 UTC (rev 48362)
@@ -459,7 +459,7 @@
 	}
 	/* use scene defaults only when transform is modal */
 	else if (t->flag & T_MODAL) {
-		if (ELEM(t->spacetype, SPACE_VIEW3D, SPACE_IMAGE)) {
+		if (ELEM3(t->spacetype, SPACE_VIEW3D, SPACE_IMAGE, SPACE_NODE)) {
 			if (ts->snap_flag & SCE_SNAP) {
 				t->modifiers |= MOD_SNAP;
 			}