[Bf-blender-cvs] [a3277ae] blender2.8: OpenGL: simple mesh edit mode for new viewport

[Mike Erwin]

Commit: a3277ae38443a63ff079cf0a73240153b08d21d8
Author: Mike Erwin
Date:   Mon Nov 7 20:24:03 2016 +0100
Branches: blender2.8
https://developer.blender.org/rBa3277ae38443a63ff079cf0a73240153b08d21d8

OpenGL: simple mesh edit mode for new viewport

Very very simple. Needs a lot of work to reach "legacy viewport" capabilities.

===================================================================

M	source/blender/editors/space_view3d/drawobject.c

===================================================================

diff --git a/source/blender/editors/space_view3d/drawobject.c b/source/blender/editors/space_view3d/drawobject.c
index 1983731..c316057 100644
--- a/source/blender/editors/space_view3d/drawobject.c
+++ b/source/blender/editors/space_view3d/drawobject.c
@@ -4253,7 +4253,60 @@ static void draw_em_fancy(Scene *scene, ARegion *ar, View3D *v3d,
 static void draw_em_fancy_new(Scene *scene, ARegion *ar, View3D *v3d,
                               Object *ob, BMEditMesh *em, DerivedMesh *cageDM, DerivedMesh *finalDM, const char dt)
 {
-	/* for now... nothing! */
+	/* for now... something simple! */
+
+	Batch *surface = MBC_get_all_triangles(cageDM);
+
+	glEnable(GL_DEPTH_TEST);
+	glDepthFunc(GL_LEQUAL);
+
+	glEnable(GL_BLEND);
+
+	/* disable depth writes for transparent surface, so it doesn't interfere with itself */
+	glDepthMask(GL_FALSE);
+
+	Batch_set_builtin_program(surface, GPU_SHADER_3D_UNIFORM_COLOR);
+	Batch_Uniform4f(surface, "color", 1.0f, 0.5f, 0.0f, 0.5f);
+	Batch_draw(surface);
+
+#if 0 /* until I understand finalDM better */
+	if (finalDM != cageDM) {
+		puts("finalDM != cageDM");
+		Batch *finalSurface = MBC_get_all_triangles(finalDM);
+		Batch_set_builtin_program(finalSurface, GPU_SHADER_3D_UNIFORM_COLOR);
+		Batch_Uniform4f(finalSurface, "color", 0.0f, 0.0f, 0.0f, 0.05f);
+		Batch_draw(finalSurface);
+	}
+#endif
+
+	glDepthMask(GL_TRUE);
+
+	/* now write surface depth so other objects won't poke through
+	 * NOTE: does not help as much as desired
+	 * TODO: draw edit object last to avoid this mess
+	 */
+	Batch_set_builtin_program(surface, GPU_SHADER_3D_DEPTH_ONLY);
+	Batch_draw(surface);
+
+	Batch *edges = MBC_get_all_edges(cageDM);
+	Batch_set_builtin_program(edges, GPU_SHADER_3D_UNIFORM_COLOR);
+	Batch_Uniform4f(edges, "color", 0.0f, 0.0f, 0.0f, 1.0f);
+	glEnable(GL_LINE_SMOOTH);
+	glLineWidth(1.5f);
+	Batch_draw(edges);
+	glDisable(GL_LINE_SMOOTH);
+
+#if 0 /* looks good even without points */
+	Batch *verts = MBC_get_all_verts(cageDM);
+	glEnable(GL_BLEND);
+
+	Batch_set_builtin_program(verts, GPU_SHADER_3D_POINT_UNIFORM_SIZE_UNIFORM_COLOR_SMOOTH);
+	Batch_Uniform4f(verts, "color", 0.0f, 0.0f, 0.0f, 1.0f);
+	Batch_Uniform1f(verts, "size", UI_GetThemeValuef(TH_VERTEX_SIZE) * 1.5f);
+	Batch_draw(verts);
+
+	glDisable(GL_BLEND);
+#endif
 }
 
 /* Mesh drawing routines */