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Game Dev Advanced

22 Collision

Axis-aligned boxes are the workhorse of game collision. Detect when two overlap, then keep a point inside an arena with clamp.

Step 1 / 2

Implement overlaps: true when the two boxes intersect. Touching edges don't count.

Hints

Two boxes overlap when they overlap on BOTH axes.
Per axis: a.x < b.x + b.w && b.x < a.x + a.w -- strict < makes a touching edge 'no overlap'.

22_collision.rs

#[derive(Clone, Copy)]
struct Aabb { x: f32, y: f32, w: f32, h: f32 }

// true when the boxes overlap (touching edges: no)
fn overlaps(a: Aabb, b: Aabb) -> bool {
    todo!()
}

#[derive(Clone, Copy)]
struct Aabb { x: f32, y: f32, w: f32, h: f32 }

// true when the boxes overlap (touching edges: no)
fn overlaps(a: Aabb, b: Aabb) -> bool {
    todo!()
}

Reset to starterCompiled in a sandbox; hidden checks must pass.

Reveal solution

#[derive(Clone, Copy)]
struct Aabb { x: f32, y: f32, w: f32, h: f32 }

fn overlaps(a: Aabb, b: Aabb) -> bool {
    a.x < b.x + b.w && b.x < a.x + a.w && a.y < b.y + b.h && b.y < a.y + a.h
}

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22 Collision