1 /*************************************************************************/
2 /*  line_builder.h                                                       */
3 /*************************************************************************/
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30 
31 #ifndef LINE_BUILDER_H
32 #define LINE_BUILDER_H
33 
34 #include "core/color.h"
35 #include "core/math/vector2.h"
36 #include "line_2d.h"
37 #include "scene/resources/gradient.h"
38 
39 class LineBuilder {
40 public:
41 	// TODO Move in a struct and reference it
42 	// Input
43 	Vector<Vector2> points;
44 	Line2D::LineJointMode joint_mode;
45 	Line2D::LineCapMode begin_cap_mode;
46 	Line2D::LineCapMode end_cap_mode;
47 	float width;
48 	Curve *curve;
49 	Color default_color;
50 	Gradient *gradient;
51 	Line2D::LineTextureMode texture_mode;
52 	float sharp_limit;
53 	int round_precision;
54 	float tile_aspect; // w/h
55 	// TODO offset_joints option (offers alternative implementation of round joints)
56 
57 	// TODO Move in a struct and reference it
58 	// Output
59 	Vector<Vector2> vertices;
60 	Vector<Color> colors;
61 	Vector<Vector2> uvs;
62 	Vector<int> indices;
63 
64 	LineBuilder();
65 
66 	void build();
67 	void clear_output();
68 
69 private:
70 	enum Orientation {
71 		UP = 0,
72 		DOWN = 1
73 	};
74 
75 	// Triangle-strip methods
76 	void strip_begin(Vector2 up, Vector2 down, Color color, float uvx);
77 	void strip_new_quad(Vector2 up, Vector2 down, Color color, float uvx);
78 	void strip_add_quad(Vector2 up, Vector2 down, Color color, float uvx);
79 	void strip_add_tri(Vector2 up, Orientation orientation);
80 	void strip_add_arc(Vector2 center, float angle_delta, Orientation orientation);
81 
82 	void new_arc(Vector2 center, Vector2 vbegin, float angle_delta, Color color, Rect2 uv_rect);
83 
84 private:
85 	bool _interpolate_color;
86 	int _last_index[2]; // Index of last up and down vertices of the strip
87 };
88 
89 #endif // LINE_BUILDER_H
90