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import * as vtkMath from 'vtk.js/Sources/Common/Core/Math';
import { vec3 } from 'gl-matrix';
// ----------------------------------------------------------------------------
export const LIGHT_TYPES = ['HeadLight', 'CameraLight', 'SceneLight'];
// ----------------------------------------------------------------------------
// vtkLight methods
// ----------------------------------------------------------------------------
function vtkLight(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkLight');
const tmpVec = new Float64Array(3);
publicAPI.getTransformedPosition = () => {
Iif (model.transformMatrix) {
vec3.transformMat4(tmpVec, model.position, model.transformMatrix);
} else {
vec3.set(tmpVec, model.position[0], model.position[1], model.position[2]);
}
return tmpVec;
};
publicAPI.getTransformedFocalPoint = () => {
if (model.transformMatrix) {
vec3.transformMat4(tmpVec, model.focalPoint, model.transformMatrix);
} else {
vec3.set(
tmpVec,
model.focalPoint[0],
model.focalPoint[1],
model.focalPoint[2]
);
}
return tmpVec;
};
publicAPI.getDirection = () => {
if (model.directionMTime < model.mtime) {
vec3.sub(model.direction, model.focalPoint, model.position);
vtkMath.normalize(model.direction);
model.directionMTime = model.mtime;
}
return model.direction;
};
// Sets the direction from a vec3 instead of a focal point
publicAPI.setDirection = (directionVector) => {
const newFocalPoint = new Float64Array(3);
vec3.sub(newFocalPoint, model.position, directionVector);
model.focalPoint = newFocalPoint;
};
publicAPI.setDirectionAngle = (elevation, azimuth) => {
const elevationRadians = vtkMath.radiansFromDegrees(elevation);
const azimuthRadians = vtkMath.radiansFromDegrees(azimuth);
publicAPI.setPosition(
Math.cos(elevationRadians) * Math.sin(azimuthRadians),
Math.sin(elevationRadians),
Math.cos(elevationRadians) * Math.cos(azimuthRadians)
);
publicAPI.setFocalPoint(0, 0, 0);
publicAPI.setPositional(0);
};
publicAPI.setLightTypeToHeadLight = () => {
publicAPI.setLightType('HeadLight');
};
publicAPI.setLightTypeToCameraLight = () => {
publicAPI.setLightType('CameraLight');
};
publicAPI.setLightTypeToSceneLight = () => {
publicAPI.setTransformMatrix(null);
publicAPI.setLightType('SceneLight');
};
publicAPI.lightTypeIsHeadLight = () => model.lightType === 'HeadLight';
publicAPI.lightTypeIsSceneLight = () => model.lightType === 'SceneLight';
publicAPI.lightTypeIsCameraLight = () => model.lightType === 'CameraLight';
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
switch: true,
intensity: 1,
color: [1, 1, 1],
position: [0, 0, 1],
focalPoint: [0, 0, 0],
positional: false,
exponent: 1,
coneAngle: 30,
coneFalloff: 5,
attenuationValues: [1, 0, 0],
transformMatrix: null,
lightType: 'SceneLight',
shadowAttenuation: 1,
direction: [0, 0, 0],
directionMTime: 0,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Build VTK API
macro.obj(publicAPI, model);
macro.setGet(publicAPI, model, [
'intensity',
'switch',
'positional',
'exponent',
'coneAngle',
'coneFalloff',
'transformMatrix',
'lightType',
'shadowAttenuation',
'attenuationValues',
]);
macro.setGetArray(
publicAPI,
model,
['color', 'position', 'focalPoint', 'attenuationValues'],
3
);
// Object methods
vtkLight(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkLight');
// ----------------------------------------------------------------------------
export default { newInstance, extend, LIGHT_TYPES };
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