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(#18) Fix mouse coordinate mapping for opengl renderer #22

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Merged
rexim merged 1 commit into from
Jul 7, 2021
Merged

(#18) Fix mouse coordinate mapping for opengl renderer #22

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16 changes: 14 additions & 2 deletions src/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -428,8 +428,20 @@ int main(int argc, char **argv)
break;

case SDL_MOUSEBUTTONDOWN: {
// TODO(#18): mouse click is broken, because the coordinates need to be mapped differently
// The feature was initially introduced in #14
const Vec2f mouse_pos = vec2f((float) event.button.x, (float) event.button.y);
switch(event.button.button) {
case SDL_BUTTON_LEFT: {
const Vec2f click_pos =
vec2f_add(mouse_pos, vec2f_sub(vec2f(camera_pos.x, -camera_pos.y + FONT_CHAR_HEIGHT * FONT_SCALE),
vec2f_mul(window_size(window), vec2fs(0.5f))));

if(click_pos.x > 0.0f && click_pos.y > 0.0f) {
editor.cursor_col = (size_t) floorf(click_pos.x / ((float) FONT_CHAR_WIDTH * FONT_SCALE));
editor.cursor_row = (size_t) floorf(click_pos.y / ((float) FONT_CHAR_HEIGHT * FONT_SCALE));
}
}
break;
}
}
break;
}
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