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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-tk-lib
* Created on: 26 авг. 2020 г.
*
* lsp-tk-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* lsp-tk-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with lsp-tk-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_TK_HELPERS_GRAPHICS_H_
#define LSP_PLUG_IN_TK_HELPERS_GRAPHICS_H_
#include <lsp-plug.in/tk/tk.h>
namespace lsp
{
namespace tk
{
bool line2d_equation
(
float x1, float y1,
float x2, float y2,
float &a, float &b, float &c
);
bool line2d_delta_equation
(
float x1, float y,
float dx, float dy,
float &a, float &b, float &c
);
bool line2d_equation
(
float dx, float dy,
float &a, float &b, float &c
);
bool line2d_intersection
(
float a1, float b1, float c1,
float a2, float b2, float c2,
float &x, float &y
);
float distance2d(float x1, float y1, float x2, float y2);
float scalar_product2d(float x1, float y1, float x2, float y2);
float vector_product2d(float x1, float y1, float x2, float y2);
float get_angle_2d
(
float x0, float y0, // Coordinates of center
float x, float y // Coordinates of dot
);
bool clip_line2d_vec(
float dx, float dy, // Line direction
float lc, float rc, float tc, float bc, // Corners from left, right, top, bottom
float error, // Allowed error
float &cx1, float &cy1, float &cx2, float &cy2 // Results
);
bool clip_line2d_eq(
float a, float b, float c, // Line equation
float lc, float rc, float tc, float bc, // Corners from left, right, top, bottom
float error, // Allowed error
float &cx1, float &cy1, float &cx2, float &cy2 // Results
);
bool clip_line2d_coord(
float x1, float x2, float y1, float y2, // Coordinates of two points laying on line
float lc, float rc, float tc, float bc, // Corners from left, right, top, bottom
float error, // Allowed error
float &cx1, float &cy1, float &cx2, float &cy2 // Results
);
void locate_line2d(
float a, float b, float c, // Line equation
float px, float py, // Point of the line
float &ma, float &mb, float &mc // New equation
);
bool locate_line2d(
float dx, float dy, // Line equation
float px, float py, // Point of the line
float &ma, float &mb, float &mc // New equation
);
bool clip2d(
float x, float y, // Coordinates of point
float lc, float rc, float tc, float bc // Corners: left, right, top, bottom
);
}
}
#endif /* LSP_PLUG_IN_TK_HELPERS_GRAPHICS_H_ */
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