geom

package
v0.0.0-...-4142f2f Latest Latest
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 Go to latest Published: Mar 16, 2024 License: MIT Imports: 4 Imported by: 0

Documentation

Overview

The geom package provides basic geometry types and functions.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Circle 

type Circle struct {
	X float32
	Y float32
	R float32
}

func MakeCircle 

func MakeCircle(x, y, r float32) Circle

func (Circle) ContainsPoint 

func (c Circle) ContainsPoint(p Point) bool

func (Circle) Diameter 

func (c Circle) Diameter() float32

func (Circle) HasOverlap 

func (c Circle) HasOverlap(other Circle) bool

type Collision 

type Collision struct {
	Point    Vector
	FarPoint Vector
	Normal   Vector
	TimeNear Vector
	TimeFar  Vector
	HitNear  float64
	HitFar   float64
}

type Cube 

type Cube [8]Point3D

func MakeCube 

func MakeCube(points [8]Point3D) Cube

func (*Cube) Centroid 

func (c *Cube) Centroid() Point3D

func (Cube) GetVertices 

func (c Cube) GetVertices() []float32

func (*Cube) Scale 

func (c *Cube) Scale(factor float32)

func (*Cube) Translate 

func (c *Cube) Translate(vector Vector3D)

type Line 

type Line struct {
	Segment Segment
	// contains filtered or unexported fields
}

func MakeLine 

func MakeLine(a, b Point) Line

func (Line) EvalX 

func (l Line) EvalX(x float32) float32

func (Line) Intersection 

func (l Line) Intersection(l2 Line) (Point, error)

func (Line) IsParrallel 

func (l Line) IsParrallel(l1, l2 Line) bool

type Mesh 

type Mesh struct {
	Vertices []float32
	Indices  []uint32
}

func NewMesh 

func NewMesh(vertices []float32, indices []uint32) *Mesh

type Model 

type Model struct {
	Meshes      []*Mesh
	Matrix      matrix.Matrix
	ScaleFactor float32
	Position    Vector3D
	Rotation    matrix.Matrix
}

func NewModel 

func NewModel(mesh *Mesh) *Model

func (*Model) ApplyMatrix 

func (m *Model) ApplyMatrix(matrix matrix.Matrix)

func (*Model) GetMeshes 

func (m *Model) GetMeshes() []*Mesh

func (*Model) GetPosition 

func (m *Model) GetPosition() Vector3D

func (*Model) GetRotation 

func (m *Model) GetRotation() matrix.Matrix

func (*Model) GetScaleFactor 

func (m *Model) GetScaleFactor() float32

func (*Model) Rotate 

func (m *Model) Rotate(angle float32, axis Vector3D)

func (*Model) Scale 

func (m *Model) Scale(factor float32)

func (*Model) SetPosition 

func (m *Model) SetPosition(v Vector3D)

func (*Model) SetRotation 

func (m *Model) SetRotation(v Vector3D)

func (*Model) Translate 

func (m *Model) Translate(v Vector3D)

type Normal 

type Normal struct{}

type Point 

type Point struct {
	X float32
	Y float32
}

func MakePoint 

func MakePoint(x, y float32) Point

func (Point) ToVector 

func (p Point) ToVector() Vector

type Point3D 

type Point3D struct {
	X, Y, Z float32
}

func MakePoint3D 

func MakePoint3D(x, y, z float32) Point3D

func (Point3D) Add 

func (p Point3D) Add(other Point3D) Point3D

func (Point3D) Cross 

func (p Point3D) Cross(other Point3D) Point3D

func (Point3D) Magnitude 

func (p Point3D) Magnitude() float32

func (Point3D) Normalize 

func (p Point3D) Normalize() Point3D

func (Point3D) Subtract 

func (p Point3D) Subtract(other Point3D) Point3D

func (Point3D) ToVector3D 

func (p Point3D) ToVector3D() Vector3D

type Polygon 

type Polygon []Point

func MakePolygon 

func MakePolygon(points ...Point) Polygon

MakePolygon creates a new polygon from a slice of points.

func (*Polygon) AddPoint 

func (p *Polygon) AddPoint(pt Point)

AddPoint appends a point to the end of the polygon.

func (Polygon) At 

func (p Polygon) At(i int) Point

At returns the i-th point of the polygon.

func (Polygon) NumPoints 

func (p Polygon) NumPoints() int

NumPoints returns the number of points in the polygon.

type Ray 

type Ray struct {
	Origin    Vector
	Direction Vector
}

type Rect 

type Rect [4]float32

Rect a float32 slice with 4 elements []float32{x, y, width, height}

func MakeRect 

func MakeRect(x, y, width, height float32) Rect

func (Rect) ContainsPoint 

func (r Rect) ContainsPoint(p Point) bool

func (Rect) Dimension 

func (r Rect) Dimension(i int) float32

Dimension returns the value of the i-th dimension

func (Rect) Dimensions 

func (r Rect) Dimensions() int

Dimensions returns the total number of dimensions

func (Rect) GetCenter 

func (r Rect) GetCenter() (float32, float32)

func (Rect) GetOverlap 

func (r Rect) GetOverlap(other Rect) (float32, float32)

func (Rect) HasRayIntersection 

func (r Rect) HasRayIntersection(ray Ray, collision *Collision) bool

HasRayIntersection returns true if an intersection exists the collision argument will contain information about the collision

func (Rect) IsAxisAlignedCollision 

func (r Rect) IsAxisAlignedCollision(other Rect) bool

type Segment 

type Segment struct {
	V0 Vector
	V1 Vector
}

type Square 

type Square [4]Point

func MakeSquare 

func MakeSquare(points [4]Point) Square

func (*Square) Area 

func (s *Square) Area() float32

func (*Square) Centroid 

func (s *Square) Centroid() Point

func (*Square) Rotate 

func (s *Square) Rotate(angle float64)

func (*Square) Scale 

func (s *Square) Scale(factor float32)

func (*Square) Translate 

func (s *Square) Translate(vector Vector)

type Texture 

type Texture struct {
	ID uint32
}

type Triangle 

type Triangle [3]Vector

func MakeTriangle 

func MakeTriangle(vecs [3]Vector) Triangle

func (*Triangle) Centroid 

func (t *Triangle) Centroid() Point

func (*Triangle) Rotate 

func (t *Triangle) Rotate(angle float32)

type Vector 

type Vector [2]float32

Vector a float32 slice with 2 elements [2]float32{x, y}

func MakeVector 

func MakeVector(x, y float32) Vector

func (Vector) Add 

func (v Vector) Add(other Vector) Vector

func (Vector) Divide 

func (v Vector) Divide(other Vector) Vector

func (Vector) GetDirection 

func (v Vector) GetDirection(b Vector) float32

func (Vector) GetDistance 

func (v Vector) GetDistance(b Vector) float32

func (Vector) Multiply 

func (v Vector) Multiply(other Vector) Vector

func (Vector) Offset 

func (v Vector) Offset(o Vector) Vector

func (Vector) String 

func (v Vector) String() string

func (Vector) Subtract 

func (v Vector) Subtract(other Vector) Vector

func (Vector) ToPoint 

func (v Vector) ToPoint() Point

type Vector3D 

type Vector3D [3]float32

func MakeVector3D 

func MakeVector3D(x, y, z float32) Vector3D

func (Vector3D) Add 

func (v Vector3D) Add(other Vector3D) Vector3D

func (Vector3D) DistanceTo 

func (v Vector3D) DistanceTo(other Vector3D) float32

func (Vector3D) Scaled 

func (v Vector3D) Scaled(scalar float32) Vector3D

Scaled scales the vector by a scalar value.

func (Vector3D) Subtract 

func (v Vector3D) Subtract(other Vector3D) Vector3D

func (Vector3D) ToPoint3D 

func (v Vector3D) ToPoint3D() Point3D

Source Files

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