vshape

type Box struct {
	ShapeBase
	Size mat32.Vec3  `desc:"size along each dimension"`
	Segs mat32.Vec3i `` /* 137-byte string literal not displayed */
}

type Capsule struct {
	ShapeBase
	Height     float32 `desc:"height of the cylinder portion"`
	TopRad     float32 `desc:"radius of the top -- set to 0 to omit top cap"`
	BotRad     float32 `desc:"radius of the bottom -- set to 0 to omit bottom cap"`
	RadialSegs int     `min:"1" desc:"number of radial segments (32 is a reasonable default for full circle)"`
	HeightSegs int     `desc:"number of height segments"`
	CapSegs    int     `desc:"number of segments in the hemisphere cap ends (16 is a reasonable default)"`
	AngStart   float32 `min:"0" max:"360" step:"5" desc:"starting angle in degrees, relative to -1,0,0 left side starting point"`
	AngLen     float32 `min:"0" max:"360" step:"5" desc:"total angle to generate in degrees (max 360)"`
}

type Cylinder struct {
	ShapeBase
	Height     float32 `desc:"height of the cylinder"`
	TopRad     float32 `desc:"radius of the top -- set to 0 for a cone"`
	BotRad     float32 `desc:"radius of the bottom"`
	RadialSegs int     `min:"1" desc:"number of radial segments (32 is a reasonable default for full circle)"`
	HeightSegs int     `desc:"number of height segments"`
	Top        bool    `desc:"render the top disc"`
	Bottom     bool    `desc:"render the bottom disc"`
	AngStart   float32 `min:"0" max:"360" step:"5" desc:"starting angle in degrees, relative to -1,0,0 left side starting point"`
	AngLen     float32 `min:"0" max:"360" step:"5" desc:"total angle to generate in degrees (max 360)"`
}

type Plane struct {
	ShapeBase
	NormAxis mat32.Dims  `` /* 235-byte string literal not displayed */
	NormNeg  bool        `` /* 135-byte string literal not displayed */
	Size     mat32.Vec2  `desc:"2D size of plane"`
	Segs     mat32.Vec2i `` /* 132-byte string literal not displayed */
	Offset   float32     `desc:"offset from origin along direction of normal to the plane"`
}

type Shape interface {
	// N returns number of vertex, index points in this shape element
	N() (nVtx, nIdx int)

	// Offs returns starting offset for verticies, indexes in full shape array,
	// in terms of points, not floats
	Offs() (vtxOff, idxOff int)

	// SetOffs sets starting offset for verticies, indexes in full shape array,
	// in terms of points, not floats
	SetOffs(vtxOff, idxOff int)

	// Set sets points in given allocated arrays
	Set(vtxAry, normAry, texAry mat32.ArrayF32, idxAry mat32.ArrayU32)

	// BBox returns the bounding box for the shape, typically centered around 0
	// This is only valid after Set has been called.
	BBox() mat32.Box3
}

type ShapeBase struct {
	VtxOff int        `desc:"vertex offset, in points"`
	IdxOff int        `desc:"index offset, in points"`
	CBBox  mat32.Box3 `desc:"cubic bounding box in local coords"`
	Pos    mat32.Vec3 `desc:"all shapes take a 3D position offset to enable composition"`
}

type ShapeGroup struct {
	ShapeBase
	Shapes []Shape `desc:"list of shapes in group"`
}

type Sphere struct {
	ShapeBase
	Radius     float32 `desc:"radius of the sphere"`
	WidthSegs  int     `min:"3" desc:"number of segments around the width of the sphere (32 is reasonable default for full circle)"`
	HeightSegs int     `min:"3" desc:"number of height segments (32 is reasonable default for full height)"`
	AngStart   float32 `min:"0" max:"360" step:"5" desc:"starting radial angle in degrees, relative to -1,0,0 left side starting point"`
	AngLen     float32 `min:"0" max:"360" step:"5" desc:"total radial angle to generate in degrees (max = 360)"`
	ElevStart  float32 `min:"0" max:"180" step:"5" desc:"starting elevation (height) angle in degrees - 0 = top of sphere, and Pi is bottom"`
	ElevLen    float32 `min:"0" max:"180" step:"5" desc:"total angle to generate in degrees (max = 180)"`
}