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Add line_from_origin function

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Abdelrahman Said 2024-01-24 23:43:14 +00:00
parent f56e6b1bb1
commit d73275f04c
1 changed files with 15 additions and 0 deletions
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15
src/ui.c
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@ -8,8 +8,10 @@
#include <stdlib.h>
#define NOODLE_HALF_WIDTH 2
#define DEFAULT_NOODLE_LENGTH 60
INTERNAL bool aabb(rect rec, i32 x, i32 y);
INTERNAL line line_from_origin(point origin, f64 angle, i32 line_length);
void init_ui_ctx(ui_ctx *ctx) {
*ctx = (ui_ctx){0};
@ -239,3 +241,16 @@ INTERNAL bool aabb(rect rec, i32 x, i32 y) {
return x > rec.topleft.x && x <= rec.topleft.x + rec.w && y > rec.topleft.y &&
y <= rec.topleft.y + rec.h;
}
INTERNAL line line_from_origin(point origin, f64 angle, i32 line_length) {
f64 rad = radians(angle);
f64 direction = angle / absolute(angle) * -1;
i32 adjacent = line_length * cos(rad) * direction; // dx
i32 opposite = line_length * sin(rad) * direction; // dy
return (line){
(point){origin.x + adjacent, origin.y + opposite},
origin,
};
}