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#ifndef LINE_BUILDER_H
#define LINE_BUILDER_H
#include "math_2d.h"
#include "color.h"
#include "scene/resources/color_ramp.h"
enum LineJointMode {
LINE_JOINT_SHARP = 0,
LINE_JOINT_BEVEL,
LINE_JOINT_ROUND
};
enum LineCapMode {
LINE_CAP_NONE = 0,
LINE_CAP_BOX,
LINE_CAP_ROUND
};
enum LineTextureMode {
LINE_TEXTURE_NONE = 0,
LINE_TEXTURE_TILE
// TODO STRETCH mode
};
class LineBuilder {
public:
// TODO Move in a struct and reference it
// Input
Vector<Vector2> points;
LineJointMode joint_mode;
LineCapMode begin_cap_mode;
LineCapMode end_cap_mode;
float width;
Color default_color;
ColorRamp* gradient;
LineTextureMode texture_mode;
float sharp_limit;
int round_precision;
// 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();
void clear_output();
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;
int _last_index[2]; // Index of last up and down vertices of the strip
};
#endif // LINE_BUILDER_H
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