Documentation
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Index ¶
- Constants
- func Area(sz image.Point) int
- func PointsClone(pts []image.Point) []image.Point
- func SizeGroups(sizes []int, maxN int) []int
- func UniqSortedInts(vals []int) []int
- func XYfmGpi(gi, nxi int) (xi, yi int)
- type Idxs
- type SzAlloc
- func (sa *SzAlloc) Alloc()
- func (sa *SzAlloc) AllocGpItems()
- func (sa *SzAlloc) AllocGps(xgpi, ygpi []int) (allocs [][]int, maxItms int)
- func (sa *SzAlloc) AllocItemsNoGps()
- func (sa *SzAlloc) LimitGpNs()
- func (sa *SzAlloc) PrintGps()
- func (sa *SzAlloc) SetSizes(gps image.Point, itmsPerGp int, itms []image.Point)
- func (sa *SzAlloc) SizesFmIdxs(xgpi, ygpi []int) []image.Point
- func (sa *SzAlloc) UniqSz()
- func (sa *SzAlloc) UpdateGpMaxSz()
- func (sa *SzAlloc) XYSizeFmIdx(idx image.Point) image.Point
Constants ¶
const MaxIters = 100
MaxIters is maximum number of iterations for adapting sizes to fit constraints
Variables ¶
This section is empty.
Functions ¶
func PointsClone ¶
PointsClone returns clone of []image.Point list
func SizeGroups ¶
SizeGroups returns evenly-spaced size groups of max N -- could be less
func UniqSortedInts ¶
UniqSortedInts returns the ints in sorted order with only unique vals
Types ¶
type Idxs ¶
type Idxs struct {
PctSize mat32.Vec2 `desc:"percent size of this image relative to max size allocated"`
GpIdx int `desc:"group index"`
ItmIdx int `desc:"item index within group (e.g., Layer)"`
}
Idxs contains the indexes where a given size is allocated
type SzAlloc ¶
type SzAlloc struct {
On bool `desc:"true if configured and ready to use"`
MaxGps image.Point `desc:"maximum number of groups in X and Y dimensions"`
MaxNGps int `desc:"maximum number of groups = X * Y"`
MaxItmsPerGp int `desc:"maximum number of items per group -- constraint is enforced in addition to MaxGps"`
ItmSizes []image.Point `desc:"original list of item sizes to be allocated"`
UniqSizes []image.Point `desc:"list of all unique sizes -- operate on this for grouping"`
UniqSzMap map[image.Point]int `desc:"map of all unique sizes, with count per"`
GpSizes []image.Point `desc:"list of allocated group sizes"`
GpAllocs [][]int `desc:"allocation of image indexes by size"`
ItmIdxs []*Idxs `desc:"allocation image value indexes to image indexes"`
XSizes []int `desc:"sorted list of all unique sizes"`
YSizes []int `desc:"sorted list of all unique sizes"`
GpNs image.Point `desc:"number of items in each dimension group (X, Y)"`
XGpIdxs []int `desc:"list of x group indexes"`
YGpIdxs []int `desc:"list of y group indexes"`
}
SzAlloc manages allocation of sizes to a spec'd maximum number of groups. Used for allocating texture images to image arrays under the severe constraints of only 16 images. Only a maximum of MaxItmsPerGp items can be allocated per grouping.
func (*SzAlloc) AllocGpItems ¶
func (sa *SzAlloc) AllocGpItems()
AllocGpItems allocates items in groups based on final GpAllocs
func (*SzAlloc) AllocGps ¶
AllocGps allocates groups based on given indexes into XSizes, YSizes. returns allocs = indexes of items per each group, and max number of items per group
func (*SzAlloc) AllocItemsNoGps ¶
func (sa *SzAlloc) AllocItemsNoGps()
AllocItemsNoGps directly allocate items each to their own group -- all fits
func (*SzAlloc) LimitGpNs ¶
func (sa *SzAlloc) LimitGpNs()
LimitGpNs updates group sizes to ensure that the MaxItmsPerGp limit is not exceeded.
func (*SzAlloc) SetSizes ¶
SetSizes sets the max number of groups along each dimension (X, Y), so total number of groups is X*Y, and max items per group, and item sizes to organize
func (*SzAlloc) SizesFmIdxs ¶
SizesFmIdxs returns X,Y sizes from X,Y indexes in image.Point into XSizes, YSizes arrays
func (*SzAlloc) UpdateGpMaxSz ¶
func (sa *SzAlloc) UpdateGpMaxSz()
UpdateGpMaxSz updates the group sizes based on actual max sizes of items
Source Files