Deformer Module
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Introduction
The following are only available to the JavaScript Deformer.
Everything in this module is in the def namespace and so methods need prefixing with def..
Member Functions
getBoundingBox() → {x:number, y:number, width:number, height:number, centre:{x:number, y:number}, left:number, right:number, top:number, bottom:number}
Return an object containing details about the selection's bounding box.
getPoints() → array[points]
Return an array of positions for each point of a Shape. These can then be looped through these to manipulate them.
// Connect the Deformer to a Shape's Deformers attribute and hit 'Return'.
var points = def.getPoints();
console.log(JSON.stringify(points));
setPoints(array[points])
Set the position for each point of a Shape.
// A simple sine wave deformer
var points = def.getPoints();
var bbox = def.getBoundingBox();
var maxX = bbox.x+bbox.width;
var frequency = 10;
var amplitude = 50;
for (let pt of points) {
let normX = cavalry.norm(pt.x, bbox.x, maxX);
pt.y += Math.sin((normX+n0*.1)*frequency)*amplitude;
}
def.setPoints(points);
meshDepth
The depth of the mesh tree (the highest number reported in the Mesh Explorer). This is a property/variable, not a method.
meshCountAtDepth(depth:int) → int
Return the number of meshes at a given depth.
getMeshesAtDepth(depth:int) → [cavalry.Mesh]
Return an array of cavalry.Mesh objects.
setMeshesAtDepth(depth:int, [cavalry.Mesh])
Replace the meshes at the given depth with a cavalry.Mesh. This will not remove any un-replaced meshes.
getMeshAtDepthAtIndex(depth:int, index:int) → cavalry.Mesh
Return a mesh at the given depth and index.
setMeshAtDepthAtIndex(depth:int, index:int, mesh:cavalry.Mesh)
Replace a mesh at the given depth and index.
setTransformAtDepthAtIndex(depth:int, index:int, position:object, rotation:double, scale:object)
Set the position of a mesh at the given depth and index. Position and Scale are optional objects with x and y values (e.g. {"x":20, "y": 5}).
clearTransformAtDepthAtIndex(depth:int, index:int)
Reset the transform of the mesh at a given depth and index.
centrePivotAtDepthAtIndex(depth:int, index:int)
Centres the pivot of the mesh at a given depth and index.
setMaterialAtDepthAtIndex(depth:int, index:int, material:cavalry.Material)
Sets the Material object for the mesh at a given depth and index.
highestDepthWithPath() → int
Returns the highest depth within a Mesh that contains a Path.
Examples
Replace a child-mesh with another mesh.
- Create a Text Shape.
- In the Attribute Editor, click the
+button on the Text Shape's Deformers attribute and choose JavaScript Deformer. - Create a Star Shape.
- Connect starShape.id→javaScriptDeformer.array.1 - this is the new
n1array Id created in step 4. - Replace the JavaScript Deformer's Expression with:
var meshes = def.getMeshesAtDepth(3);
var replaceIndex = n0;
if (meshes.length > replaceIndex) {
let currentMesh = def.getMeshAtDepthAtIndex(3, replaceIndex);
let bbox = currentMesh.getBoundingBox();
let path = n1.path;
def.setMeshAtDepthAtIndex(3,replaceIndex, path);
def.setTransformAtDepthAtIndex(3,replaceIndex, bbox.centre);
} - Change the JavaScript Deformer's
n0value.
Replace a child-mesh with a custom Path.
- Create a Text Shape.
- In the Attribute Editor, click the
+button on the Text Shape's Deformers attribute and choose JavaScript Deformer. - Replace the JavaScript Deformer's Expression with:
var meshes = def.getMeshesAtDepth(3);
var replaceIndex = n0;
if (meshes.length > replaceIndex) {
var path = new cavalry.Path()
var newMesh = new cavalry.Mesh();
var material = new cavalry.Material();
material.fillColor = "#ff24e0";
material.stroke = true;
material.strokeColor = "#000000";
material.strokeWidth = 2;
let bbox = meshes[replaceIndex].getBoundingBox();
path.addEllipse(bbox.centre.x,bbox.centre.y,30,80);
newMesh.addPath(path, material);
def.setMeshAtDepthAtIndex(3,replaceIndex,newMesh);
} - Change the JavaScript Deformer's
n0value.
Modify a child-mesh at a depth and index.
- Create a Text Shape.
- In the Attribute Editor, click the
+button on the Text Shape's Deformers attribute and choose JavaScript Deformer. - Click the
+button at the bottom of the JavaScript Deformer and choose 'Add Int'. - Replace the JavaScript Deformer's Expression with:
var meshes = def.getMeshesAtDepth(3);
var replaceIndex = n1;
if (meshes.length > 3) {
var material = new cavalry.Material();
material.fillColor = "#ff24e0";
material.stroke = true;
material.strokeColor = "#000000";
material.strokeWidth = 2;
def.setMaterialAtDepthAtIndex(3,replaceIndex,material);
def.centrePivotAtDepthAtIndex(3,replaceIndex)
def.setTransformAtDepthAtIndex(3,replaceIndex, {}, n0, {"x": 0.8, "y": 0.8});
} - Change the JavaScript Deformer's
n0andn1values.
Deform a Mesh structure based on the overall bounding box.
- Create a Text Shape.
- In the Attribute Editor, click the
+button on the Text Shape's Deformers attribute and choose JavaScript Deformer. - Replace the JavaScript Deformer's Expression with:
var frequency = 4;
var amplitude = 30;
var meshes = def.getMeshesAtDepth(3);
var bbox = def.getBoundingBox();
for (var thisMesh of meshes) {
let [minX, maxX] = [bbox.x, bbox.x+bbox.width];
for (let i = 0; i < thisMesh.count(); i++) {
var pathData = thisMesh.getPathDataAtIndex(i);
for (var verb of pathData) {
if (verb.type != "close") {
// Set 'xpos' in the range 0 to 1
let xpos = cavalry.norm(verb.point.x, minX, maxX);
// 'displacement' ranges from 'amplitude' to 0
let displacement = amplitude * (1 - xpos);
// Control the start of the sine wave with 'n0'
let t = (n0 * 0.1 + xpos * 2 * Math.PI);
let adjustment = Math.sin(t * frequency) * displacement;
verb.point.y += adjustment;
if (verb.type == "cubicTo") {
verb.cp1.y += adjustment;
verb.cp2.y += adjustment;
}
}
}
thisMesh.setPathDataAtIndex(i, pathData);
}
}
def.setMeshesAtDepth(3, meshes); - Change the JavaScript Deformer's
n0value.