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fit ply file with various sh_degree. #2

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fit ply file with various sh_degree. #2

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ae2ac54
fit ply file with various sh_degree.
identxxy Mar 21, 2024
9928210
fit ply file with various sh_degree.
identxxy Mar 21, 2024
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15 changes: 13 additions & 2 deletions src/loader.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,16 @@ async function loadPly(content) {
const match = header.match(regex)
gaussianCount = parseInt(match[1])

// Get degree of SH
const regexSH = /(f_rest_\d+)\nproperty float opacity/
const matchSH = header.match(regexSH)
let shCount;
if (matchSH !== null) {
shCount = parseInt(matchSH[1].split('f_rest_')[1]) + 1;
} else {
shCount = 0;
}

document.querySelector('#loading-text').textContent = `Success. Initializing ${gaussianCount} gaussians...`

// Create arrays for gaussian properties
Expand All @@ -29,7 +39,8 @@ async function loadPly(content) {

// Helpers
const sigmoid = (m1) => 1 / (1 + Math.exp(-m1))
const NUM_PROPS = 62
// xyz + nxnynz + f_dc_012 + f_rest_n + opacity + scale_xyz + rot_0123
const NUM_PROPS = 9 + shCount + 8

// Create a dataview to access the buffer's content on a byte levele
const view = new DataView(content)
Expand All @@ -50,7 +61,7 @@ async function loadPly(content) {
// const n = fromDataView(splatID, 3, 6) // Not used
const harmonic = fromDataView(splatID, 6, 9)

const H_END = 6 + 48 // Offset of the last harmonic coefficient
const H_END = 9 + shCount // Offset of the last harmonic coefficient
const opacity = fromDataView(splatID, H_END)
const scale = fromDataView(splatID, H_END + 1, H_END + 4)
const rotation = fromDataView(splatID, H_END + 4, H_END + 8)
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