prendy/dist/helpers/prendyUtils/backdrops.js

Make games with prerendered backdrops using babylonjs and repond

import { getState } from "repond";
import { getGlobalState } from "../../helpers/prendyUtils/global";
import { meta } from "../../meta";
export function getNowBackdropFrameInfo(cameraName) {
    const { placeInfoByName } = meta.assets;
    // const { nowPlaceName, nowSegmentName, nowCamName } = getGlobalState();
    const { nowPlaceName, nowSegmentName } = getGlobalState();
    const nowCamName = cameraName;
    const { backdropsByCamera } = placeInfoByName[nowPlaceName];
    const backdropInfo = backdropsByCamera[nowCamName][nowSegmentName];
    const maxFramesPerRow = backdropInfo.maxFramesPerRow;
    const totalFrames = backdropInfo.totalFrames;
    const texturesAmount = backdropInfo.textures.length;
    const maxFramesForTexture = maxFramesPerRow * maxFramesPerRow; // Assuming square grid for full textures
    const { backdropFrame } = getState().global.main;
    // Calculate the current texture index
    let nowTextureIndex = Math.floor(backdropFrame / maxFramesForTexture);
    nowTextureIndex = Math.min(nowTextureIndex, texturesAmount - 1);
    // Calculate the frame index within the current texture
    const backdropFrameForNowTexture = backdropFrame - nowTextureIndex * maxFramesForTexture;
    // Determine the number of frames in the current texture
    let framesInCurrentTexture;
    if (nowTextureIndex < texturesAmount - 1) {
        // Full texture
        framesInCurrentTexture = maxFramesForTexture;
    }
    else {
        // Last texture (might have fewer frames)
        framesInCurrentTexture = totalFrames - maxFramesForTexture * (texturesAmount - 1);
    }
    // Calculate framesPerColumn for the current texture
    const framesPerRow = maxFramesPerRow;
    const framesPerColumn = Math.ceil(framesInCurrentTexture / framesPerRow);
    // Calculate frame size in UV coordinates
    const frameSize = {
        x: 1 / framesPerRow,
        y: 1 / framesPerColumn,
    };
    return {
        frameSize,
        framesPerRow,
        framesPerColumn,
        nowTextureIndex,
        backdropFrameForNowTexture,
    };
}