-- import "github.com/go3d/go-3dutil"
Spatial data types & helpers for use in 3D apps (AABB, Frustum etc.)
type AaBb struct {
Min, Max, Center, Extent unum.Vec3
}func (me *AaBb) BoundingSphere(center *unum.Vec3) (radius float64)func (me *AaBb) Clear()func (me *AaBb) ResetMinMax()func (me *AaBb) SetCenterExtent()func (me *AaBb) SetMinMax()func (me *AaBb) Transform(mat *unum.Mat4)func (me *AaBb) UpdateMinMax(vec *unum.Vec3)func (me *AaBb) UpdateMinMaxFrom(aabb *AaBb)type Bounds struct {
Sphere float64
AaBox AaBb
}func (me *Bounds) Clear()func (me *Bounds) Reset()type Frustum struct {
Bounding Bounds
Planes [6]FrustumPlane
Axes struct {
X, Y, Z unum.Vec3
}
Near, Far FrustumCoords
}func (me *Frustum) HasPoint(pos, point *unum.Vec3, zNear, zFar float64) boolfunc (me *Frustum) HasSphere(pos, center *unum.Vec3, radius, zNear, zFar float64) (fullyInside, intersect bool)func (me *Frustum) UpdateAxes(dir, upVector, upAxis *unum.Vec3)func (me *Frustum) UpdateAxesCoordsPlanes(persp *Perspective, pos, dir, upVector, upAxis *unum.Vec3)func (me *Frustum) UpdateCoords(persp *Perspective, pos *unum.Vec3)func (me *Frustum) UpdatePlanes()func (me *Frustum) UpdatePlanesGH(mat *unum.Mat4, normalize bool)Gribb/Hartmann: "Fast Extraction of Viewing Frustum Planes from the WorldView-Projection Matrix"
func (me *Frustum) UpdateRatio(persp *Perspective, aspectRatio float64)type FrustumCoords struct {
unum.Vec2
C, TL, TR, BL, BR unum.Vec3
}type FrustumPlane struct {
unum.Vec4
}func (me *FrustumPlane) Normalize()type MeshDescF3 struct {
// The indexed vertices making up this triangle face.
V [3]MeshDescF3V
// ID, Tags
MeshFaceBase
}Represents an indexed triangle face.
func NewMeshDescF3(tags, id string, verts ...MeshDescF3V) (me *MeshDescF3)Creates and initializes a new MeshDescF3V with the specified tags, ID and verts, and returns it. tags may be empty or contain multiple classification tags separated by spaces, which will be split into Tags.
type MeshDescF3V struct {
// Index of the vertex position
PosIndex uint32
// Index of the texture-coordinate.
TexCoordIndex uint32
// Index of the vertex normal.
NormalIndex uint32
}Represents an indexed vertex in a MeshDescF3.
type MeshDescVA2 [2]float32Represents a 2-component vertex attribute in a MeshDescriptor. (such as for example texture-coordinates)
type MeshDescVA3 [3]float32Represents a 3-component vertex attribute in a MeshDescriptor (such as for example vertex-normals)
func (me *MeshDescVA3) ToVec3(vec *unum.Vec3)type MeshDescriptor struct {
// Vertex positions
Positions []MeshDescVA3
// Vertex texture coordinates
TexCoords []MeshDescVA2
// Vertex normals
Normals []MeshDescVA3
// Indexed triangle definitions
Faces []MeshDescF3
}Represents yet-unprocessed, descriptive mesh source data.
func MeshDescriptorCube() (meshDescriptor *MeshDescriptor, err error)A MeshProvider that creates MeshDescriptor for a cube with extents -1 .. 1. args is ignored and err is always nil. The returned MeshDescriptor contains 12 triangle faces with IDs "t0" through "t11". These faces are classified in 6 distinct tags: "front","back","top","bottom","right","left".
func MeshDescriptorPlane() (meshDescriptor *MeshDescriptor, err error)A MeshProvider that creates MeshDescriptor for a flat ground plane with extents -1 .. 1. args is ignored and err is always nil. The returned MeshDescriptor contains 2 triangle faces with IDs "t0" through "t1". These faces are all classified with tag: "plane".
func MeshDescriptorPyramid() (meshDescriptor *MeshDescriptor, err error)A MeshProvider that creates MeshDescriptor for a pyramid with extents -1 .. 1. args is ignored and err is always nil. The returned MeshDescriptor contains 4 triangle faces with IDs "t0" through "t3". These faces are all classified with tag: "pyr".
func MeshDescriptorQuad() (meshDescriptor *MeshDescriptor, err error)A MeshProvider that creates MeshDescriptor for a quad with extents -1 .. 1. args is ignored and err is always nil. The returned MeshDescriptor contains 2 triangle faces with IDs "t0" through "t1". These faces are all classified with tag: "quad".
func MeshDescriptorTri() (meshDescriptor *MeshDescriptor, err error)A MeshProvider that creates MeshDescriptor for a triangle with extents -1 .. 1. args is ignored and err is always nil. The returned MeshDescriptor contains 1 triangle face with ID "t0" and tag "tri".
func (me *MeshDescriptor) AddFaces(faces ...*MeshDescF3)Adds all specified Faces to this MeshDescriptor.
func (me *MeshDescriptor) AddNormals(normals ...MeshDescVA3)Adds all the specified Normals to this MeshDescriptor.
func (me *MeshDescriptor) AddPositions(positions ...MeshDescVA3)Adds all specified Positions to this MeshDescriptor.
func (me *MeshDescriptor) AddTexCoords(texCoords ...MeshDescVA2)Adds all the specified TexCoords to this MeshDescriptor.
type MeshFaceBase struct {
// Mesh-unique identifier for this face.
ID string
// Arbitrary classification tags for this face.
Tags []string
}type MeshProvider func() (*MeshDescriptor, error)type Perspective struct {
// Whether this is a perspective-projection camera. Defaults to true.
// If false, no projection transformation is applied.
Enabled bool
// Vertical field-of-view angle.
FovY struct {
// In degrees. Defaults to 37.8493.
Deg float64
// Deg-in-radians, times 0.5. This should always be kept in sync with Deg.
RadHalf float64
}
// Distance of the far-plane from the camera.
ZFar float64
// Distance of the near-plane from the camera.
ZNear float64
}-- godocdown http://github.com/robertkrimen/godocdown