infinipaint/src/DrawCollision.cpp

/*  
 * InfiniPaint
 * Copyright (C) 2025-2026 Yousef Khadadeh
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include "DrawCollision.hpp"
#include <include/core/SkPaint.h>
#include <include/core/SkPath.h>
#include <include/core/SkPathBuilder.h>

void draw_collider(SkCanvas* canvas, const DrawData& drawData, const SCollision::AABB<float>& aabb, const SkPaint& p) {
    SkRect r = SkRect::MakeLTRB(aabb.min.x(), aabb.min.y(), aabb.max.x(), aabb.max.y());
    canvas->drawRect(r, p);
}

void draw_collider(SkCanvas* canvas, const DrawData& drawData, const SCollision::Circle<float>& circle, const SkPaint& p) {
    canvas->drawCircle(circle.pos.x(), circle.pos.y(), circle.radius, p);
}

void draw_collider(SkCanvas* canvas, const DrawData& drawData, const SCollision::Triangle<float>& triangle, const SkPaint& p) {
    SkPathBuilder path;
    path.moveTo(convert_vec2<SkPoint>(triangle.p[0]));
    path.lineTo(convert_vec2<SkPoint>(triangle.p[1]));
    path.lineTo(convert_vec2<SkPoint>(triangle.p[2]));
    path.close();
    canvas->drawPath(path.detach(), p);
}

void draw_collider(SkCanvas* canvas, const DrawData& drawData, const SCollision::ColliderCollection<float>& collection, const SkPaint& p) {
    for(auto& aabb : collection.aabb)
        draw_collider(canvas, drawData, aabb, p);
    for(auto& circle : collection.circle)
        draw_collider(canvas, drawData, circle, p);
    for(auto& triangle : collection.triangle)
        draw_collider(canvas, drawData, triangle, p);
}

void draw_collider(SkCanvas* canvas, const DrawData& drawData, const SCollision::BVHContainer<float>& bvh, const SkPaint& p) {
    for(auto& child : bvh.children)
        draw_collider(canvas, drawData, child, p);
    draw_collider(canvas, drawData, bvh.objects, p);
}