Struct tray_rust::geometry::rectangle::Rectangle

pub struct Rectangle { /* fields omitted */ }

A rectangle centered at the origin spanning [-width / 2, -height / 2] to [width / 2, height / 2] with a normal along [0, 0, 1]

Methods

impl Rectangle

pub fn new(width: f32, height: f32) -> Rectangle

Create a new rectangle with the desired width and height

Trait Implementations

impl Geometry for Rectangle

fn intersect(&self, ray: &mut Ray) -> Option<DifferentialGeometry>

Test a ray for intersection with the geometry. The ray should have been previously transformed into the geometry's object space otherwise the test will be incorrect. Returns the differential geometry containing the hit information if the ray hit the object and set's the ray's max_t member accordingly

impl Boundable for Rectangle

fn bounds(&self, _: f32, _: f32) -> BBox

Get an AABB reporting the object's bounds over the time period The default implementation assumes the object isn't animated and simply returns its bounds. This is kind of a hack to use the BVH for animated geomtry (instances) and non-animated geometry (triangles).

fn update_deformation(&mut self, start: f32, end: f32)

Have the object recompute its bounds for the time range. In the case of deforming geometry this can rebuild acceleration structures for example.

impl Sampleable for Rectangle

fn sample_uniform(&self, samples: &(f32, f32)) -> (Point, Normal)

Uniform sampling for a rect is simple: just scale the two samples into the rectangle's space and return them as the x,y coordinates of the point chosen

fn sample(&self, _: &Point, samples: &(f32, f32)) -> (Point, Normal)

Sample the object using the probability density of the solid angle from p to the sampled point on the surface. Returns the sampled point and the surface normal at that point

fn surface_area(&self) -> f32

Compute the sphere's surface area

fn pdf(&self, p: &Point, w_i: &Vector) -> f32

Compute the PDF that the ray from p with direction w_i intersects the shape. This is the same as disk for computing PDF, we just use the rectangle's surface area instead

impl Clone for Rectangle

fn clone(&self) -> Rectangle

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Rectangle