@openhps/core/dist/esm/three/nodes/accessors/Position.js

Open Hybrid Positioning System - Core component

import { attribute } from '../core/AttributeNode.js';
import { Fn } from '../tsl/TSLCore.js';
import { modelWorldMatrix } from './ModelNode.js';

/**
 * TSL object that represents the position attribute of the current rendered object.
 *
 * @tsl
 * @type {AttributeNode<vec3>}
 */
export const positionGeometry = /*@__PURE__*/attribute('position', 'vec3');

/**
 * TSL object that represents the vertex position in local space of the current rendered object.
 *
 * @tsl
 * @type {AttributeNode<vec3>}
 */
export const positionLocal = /*@__PURE__*/positionGeometry.toVarying('positionLocal');

/**
 * TSL object that represents the previous vertex position in local space of the current rendered object.
 * Used in context of {@link VelocityNode} for rendering motion vectors.
 *
 * @tsl
 * @type {AttributeNode<vec3>}
 */
export const positionPrevious = /*@__PURE__*/positionGeometry.toVarying('positionPrevious');

/**
 * TSL object that represents the vertex position in world space of the current rendered object.
 *
 * @tsl
 * @type {VaryingNode<vec3>}
 */
export const positionWorld = /*@__PURE__*/modelWorldMatrix.mul(positionLocal).xyz.toVarying('v_positionWorld').context({
  needsPositionReassign: true
});

/**
 * TSL object that represents the position world direction of the current rendered object.
 *
 * @tsl
 * @type {Node<vec3>}
 */
export const positionWorldDirection = /*@__PURE__*/positionLocal.transformDirection(modelWorldMatrix).toVarying('v_positionWorldDirection').normalize().toVar('positionWorldDirection').context({
  needsPositionReassign: true
});

/**
 * TSL object that represents the vertex position in view space of the current rendered object.
 *
 * @tsl
 * @type {VaryingNode<vec3>}
 */
export const positionView = /*@__PURE__*/Fn(builder => {
  return builder.context.setupPositionView();
}, 'vec3').once()().toVarying('v_positionView').context({
  needsPositionReassign: true
});

/**
 * TSL object that represents the position view direction of the current rendered object.
 *
 * @tsl
 * @type {VaryingNode<vec3>}
 */
export const positionViewDirection = /*@__PURE__*/positionView.negate().toVarying('v_positionViewDirection').normalize().toVar('positionViewDirection');