// SPDX-License-Identifier: MIT
// Copyright (c) 2026 Incoprea
// Volume of four planned vertices
// Not compiled or tested in-world
// Setup: Use a spare owned prim. Set A/B/C/D in the same frame. Touch for owner-only results.
// Stop / restore: Disable/remove. No scene properties change.
// Notes: Signed volume follows vertex order. A near-zero result indicates coplanar or degenerate input.
// License: see LICENSE in this distribution.
// Original Incoprea. MIT.
vector A=<0.0,0.0,0.0>;
vector B=<4.0,0.0,0.0>;
vector C=<0.0,3.0,0.0>;
vector D=<0.0,0.0,6.0>;
default
{
    touch_start(integer detectedCount)
    {
        if(llDetectedKey(0)!=llGetOwner())return;
        float signedVolume=((B-A)*((C-A)%(D-A)))/6.0;
        llOwnerSay("Signed volume="+(string)signedVolume+"; absolute volume="+(string)llFabs(signedVolume));
    }
}