63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
package render
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"image"
|
|
"image/color/palette"
|
|
"image/draw"
|
|
"image/gif"
|
|
|
|
"github.com/hytale-tools/blockymodel-merger/pkg/texture"
|
|
)
|
|
|
|
// RenderGIF renders a GLB model to an animated GIF rotating 360 degrees
|
|
func RenderGIF(glbBytes []byte, atlas *texture.Atlas, background string, frames, width, height, delay int) ([]byte, error) {
|
|
// Parse background color
|
|
bgColor, err := ParseHexColor(background)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid background color: %w", err)
|
|
}
|
|
|
|
// Get atlas image
|
|
var atlasImage = atlas.Image
|
|
|
|
// Convert GLB to mesh
|
|
mesh, err := GLBToMesh(glbBytes, atlasImage)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("converting GLB to mesh: %w", err)
|
|
}
|
|
|
|
// Calculate rotation per frame
|
|
rotationPerFrame := 360.0 / float64(frames)
|
|
|
|
// Create GIF structure
|
|
g := &gif.GIF{
|
|
Image: make([]*image.Paletted, frames),
|
|
Delay: make([]int, frames),
|
|
LoopCount: 0, // 0 = infinite loop
|
|
}
|
|
|
|
// Render each frame
|
|
for i := 0; i < frames; i++ {
|
|
rotation := float64(i) * rotationPerFrame
|
|
|
|
// Render frame
|
|
img := RenderScene(mesh, atlasImage, rotation, width, height, bgColor)
|
|
|
|
// Quantize to palette
|
|
paletted := image.NewPaletted(img.Bounds(), palette.Plan9)
|
|
draw.FloydSteinberg.Draw(paletted, img.Bounds(), img, image.Point{})
|
|
|
|
g.Image[i] = paletted
|
|
g.Delay[i] = delay
|
|
}
|
|
|
|
// Encode GIF
|
|
var buf bytes.Buffer
|
|
if err := gif.EncodeAll(&buf, g); err != nil {
|
|
return nil, fmt.Errorf("encoding GIF: %w", err)
|
|
}
|
|
|
|
return buf.Bytes(), nil
|
|
}
|