66 lines
1.8 KiB
Rust
66 lines
1.8 KiB
Rust
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//! Module containing the bounding box struct.
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use math::Number;
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macro_rules! make_bounding_box {
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($name: ident, $vector: ident, $size: expr) => {
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use math::vector::$vector;
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/// Represents a bounding box.
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pub struct $name<T> {
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min: $vector<T>,
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max: $vector<T>,
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}
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impl<T: PartialOrd + Copy + Clone> $name<T> {
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/// Creates a bounding box from its min and max coordinates.
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pub fn new(min: $vector<T>, max: $vector<T>) -> $name<T> {
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$name {
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min: min,
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max: max,
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}
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}
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/// Enlarges the bounding box so it contains the point passed as parameter.
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pub fn add_point(&mut self, point: &$vector<T>) {
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for i in 0..$size {
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if point[i] < self.min[i] {
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self.min[i] = point[i];
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}
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if point[i] > self.max[i] {
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self.max[i] = point[i];
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}
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}
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}
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/// Returns the minimum value of the bounding box.
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pub fn min(&self) -> $vector<T> {
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self.min
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}
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/// Returns the maximum value of the bounding box.
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pub fn max(&self) -> $vector<T> {
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self.max
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}
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}
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impl<T: Number> $name<T> {
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/// Scales a bounding box from its center.
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pub fn scale(&mut self, factor: T) {
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let diag = self.max - self.min;
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self.min -= diag * factor;
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self.max += diag * factor;
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}
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}
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}
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}
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make_bounding_box!(BoundingBox2, Vector2, 2);
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make_bounding_box!(BoundingBox3, Vector3, 3);
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make_bounding_box!(BoundingBox4, Vector4, 4);
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