39 lines
970 B
JavaScript
39 lines
970 B
JavaScript
OV.GetTriangleArea = function (v0, v1, v2)
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{
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const a = OV.CoordDistance3D (v0, v1);
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const b = OV.CoordDistance3D (v1, v2);
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const c = OV.CoordDistance3D (v0, v2);
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const s = (a + b + c) / 2.0;
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const areaSquare = s * (s - a) * (s - b) * (s - c);
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if (areaSquare < 0.0) {
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return 0.0;
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}
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return Math.sqrt (areaSquare);
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};
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OV.GetTetrahedronSignedVolume = function (v0, v1, v2)
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{
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return OV.DotVector3D (v0, OV.CrossVector3D (v1, v2)) / 6.0;
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};
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OV.CalculateVolume = function (object3D)
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{
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if (!OV.IsSolid (object3D)) {
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return null;
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}
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let volume = 0.0;
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object3D.EnumerateTriangleVertices ((v0, v1, v2) => {
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volume += OV.GetTetrahedronSignedVolume (v0, v1, v2);
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});
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return volume;
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};
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OV.CalculateSurfaceArea = function (object3D)
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{
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let surface = 0.0;
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object3D.EnumerateTriangleVertices ((v0, v1, v2) => {
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surface += OV.GetTriangleArea (v0, v1, v2);
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});
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return surface;
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};
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