initial commit, 4.5 stable

scene/2d/line_builder.h

@@ -0,0 +1,83 @@
+/**************************************************************************/
+/*  line_builder.h                                                        */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "line_2d.h"
+
+class LineBuilder {
+public:
+	// TODO Move in a struct and reference it
+	// Input
+	Vector<Vector2> points;
+	Line2D::LineJointMode joint_mode = Line2D::LINE_JOINT_SHARP;
+	Line2D::LineCapMode begin_cap_mode = Line2D::LINE_CAP_NONE;
+	Line2D::LineCapMode end_cap_mode = Line2D::LINE_CAP_NONE;
+	bool closed = false;
+	float width = 10.0;
+	Curve *curve = nullptr;
+	Color default_color = Color(0.4, 0.5, 1);
+	Gradient *gradient = nullptr;
+	Line2D::LineTextureMode texture_mode = Line2D::LineTextureMode::LINE_TEXTURE_NONE;
+	float sharp_limit = 2.f;
+	int round_precision = 8;
+	float tile_aspect = 1.f; // w/h
+	// TODO offset_joints option (offers alternative implementation of round joints)
+
+	// TODO Move in a struct and reference it
+	// Output
+	Vector<Vector2> vertices;
+	Vector<Color> colors;
+	Vector<Vector2> uvs;
+	Vector<int> indices;
+
+	LineBuilder();
+
+	void build();
+
+private:
+	enum Orientation {
+		UP = 0,
+		DOWN = 1
+	};
+
+	// Triangle-strip methods
+	void strip_begin(Vector2 up, Vector2 down, Color color, float uvx);
+	void strip_new_quad(Vector2 up, Vector2 down, Color color, float uvx);
+	void strip_add_quad(Vector2 up, Vector2 down, Color color, float uvx);
+	void strip_add_tri(Vector2 up, Orientation orientation);
+	void strip_add_arc(Vector2 center, float angle_delta, Orientation orientation);
+
+	void new_arc(Vector2 center, Vector2 vbegin, float angle_delta, Color color, Rect2 uv_rect);
+
+private:
+	bool _interpolate_color = false;
+	int _last_index[2] = {}; // Index of last up and down vertices of the strip
+};