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June 12, 2024 10:23
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After effects expressions and scripts collected from various authors and myself.
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| //Position | |
| L=thisComp.layer("Object center"); | |
| L.toWorld(L.effect(name)("3D Point")); | |
| //Scale | |
| L =thisComp.layer("Object center"); | |
| [L.transform.scale[0]/100*value[0],L.transform.scale[1]/100*value[1],L.transform.scale[2]/100*value[2]]; | |
| //Orientation | |
| L = thisComp.layer("Object center"); | |
| u = fromWorldVec(L.toWorldVec([1,0,0])); | |
| v = fromWorldVec(L.toWorldVec([0,1,0])); | |
| w = normalize(fromWorldVec(L.toWorldVec([0,0,1]))); | |
| sinb = clamp(w[0],-1,1); | |
| b = Math.asin(sinb); | |
| cosb = Math.cos(b); | |
| if (Math.abs(cosb) > .0005){ | |
| c = -Math.atan2(v[0],u[0]); | |
| a = -Math.atan2(w[1],w[2]); | |
| }else{ | |
| a = (sinb < 0 ? -1 : 1)*Math.atan2(u[1],v[1]); | |
| c = 0; | |
| } | |
| [radiansToDegrees(a),radiansToDegrees(b),radiansToDegrees(c)] |
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| from Paul Conigliaro | |
| /******************************** | |
| Path Length | |
| Writes the length of the first selected path to the Info panel | |
| and copies result to clipboard | |
| ********************************/ | |
| { | |
| var thisComp = app.project.activeItem; | |
| var thisShape = thisComp.selectedProperties[0]; | |
| try{ | |
| var pathLength = Math.round(getPathLength(thisShape.property("Path").value)*100)/100; | |
| if($.os.indexOf("Macintosh") === -1) { var cmdString = 'cmd.exe /c cmd.exe /c "echo ' + pathLength + ' | clip"'; } | |
| else { var cmdString = 'echo "' + pathLength + '" | pbcopy'; } | |
| system.callSystem(cmdString); | |
| clearOutput(); | |
| writeLn("Path Length: " + pathLength + " pixels."); | |
| //Uncomment this line to display alert instead. | |
| //alert("Path Length: " + pathLength + " pixels."); | |
| } catch(e){ | |
| alert("ERROR: Did you select only paths?"); | |
| } | |
| function getPathLength(shapePath) { | |
| var len = 0; | |
| var verts = shapePath.vertices; | |
| var numVerts = verts.length; | |
| var ins = shapePath.inTangents; | |
| var outs = shapePath.outTangents; | |
| for (var i = 0; i < numVerts-1; i++) { len += getCurveLength(verts[i],verts[i+1],outs[i],ins[i+1]); } | |
| if(shapePath.closed == true) { len += getCurveLength(verts[numVerts-1],verts[0],outs[numVerts-1],ins[0]);} | |
| return len; | |
| //Curve Segement Length function from Hernan Torrisi | |
| function getCurveLength(initPos, endPos, outBezier, inBezier) { | |
| var k, curveSegments = 100, point, lastPoint = null, ptDistance, absToCoord, absTiCoord, triCoord1, triCoord2, triCoord3, liCoord1, liCoord2, ptCoord, perc, addedLength = 0, i, len; | |
| for (k = 0; k < curveSegments; k += 1) { | |
| point = []; | |
| perc = k / (curveSegments - 1); | |
| ptDistance = 0; | |
| absToCoord = []; | |
| absTiCoord = []; | |
| len = outBezier.length; | |
| for (i = 0; i < len; i += 1) { | |
| if (absToCoord[i] === null || absToCoord[i] === undefined) { | |
| absToCoord[i] = initPos[i] + outBezier[i]; | |
| absTiCoord[i] = endPos[i] + inBezier[i]; | |
| } | |
| triCoord1 = initPos[i] + (absToCoord[i] - initPos[i]) * perc; | |
| triCoord2 = absToCoord[i] + (absTiCoord[i] - absToCoord[i]) * perc; | |
| triCoord3 = absTiCoord[i] + (endPos[i] - absTiCoord[i]) * perc; | |
| liCoord1 = triCoord1 + (triCoord2 - triCoord1) * perc; | |
| liCoord2 = triCoord2 + (triCoord3 - triCoord2) * perc; | |
| ptCoord = liCoord1 + (liCoord2 - liCoord1) * perc; | |
| point.push(ptCoord); | |
| if (lastPoint !== null) { | |
| ptDistance += Math.pow(point[i] - lastPoint[i], 2); | |
| } | |
| } | |
| ptDistance = Math.sqrt(ptDistance); | |
| addedLength += ptDistance; | |
| lastPoint = point; | |
| } | |
| return addedLength; | |
| } | |
| } | |
| } |
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