camera

Documentation

Overview

Package camera provides a virtual camera that allows for taking pictures of a scene.

Index

• func RayForPixel(c *Camera, px int, py int) (*ray.Ray, error)
• func Render(c *Camera, w *world.World) (*canvas.Canvas, error)
• type Camera
  • func NewCamera(horizontalSize int, verticalSize int, fieldOfView float64) *Camera
  • func NewCameraWithTransform(horizontalSize int, verticalSize int, fieldOfView float64, ...) *Camera

Functions

func RayForPixel

func RayForPixel(c *Camera, px int, py int) (*ray.Ray, error)

RayForPixel returns a new ray that starts at the passed camera and passes through the indicated (x, y) pixel on the canvas.

func Render

func Render(c *Camera, w *world.World) (*canvas.Canvas, error)

Render uses the passed camera to render the passed world into a canvas.

Types

type Camera

type Camera struct {
	// contains filtered or unexported fields
}

Camera is a virtual Camera that can be moved around, zoomed in and out, and transformed around a scene.

func NewCamera

func NewCamera(horizontalSize int, verticalSize int, fieldOfView float64) *Camera

NewCamera returns a new camera having the passed horizontal and vertical size in pixels, and field of view angle.

func NewCameraWithTransform

func NewCameraWithTransform(horizontalSize int, verticalSize int, fieldOfView float64,
	transform *matrix.Matrix) *Camera

NewCameraWithTransform returns a new camera having the passed horizontal and vertical size in pixels, and field of view angle, and transform.