import { StandardMaterial } from "../Materials/standardMaterial.js";
import { Color3 } from "../Maths/math.color.js";
import { Matrix, TmpVectors, Vector3 } from "../Maths/math.vector.js";
import { CreateLines } from "../Meshes/Builders/linesBuilder.js";
import { Mesh } from "../Meshes/mesh.js";
import { VertexData } from "../Meshes/mesh.vertexData.js";
import { TransformNode } from "../Meshes/transformNode.js";
/**
 * Class used to render a debug view of the frustum for a directional light
 * @see https://playground.babylonjs.com/#7EFGSG#4
 * @since 5.0.0
 */
export class DirectionalLightFrustumViewer {
    /**
     * Gets or sets the transparency of the frustum planes
     */
    get transparency() {
        return this._transparency;
    }
    set transparency(alpha) {
        this._transparency = alpha;
        for (let i = 6; i < 12; ++i) {
            this._lightHelperFrustumMeshes[i].material.alpha = alpha;
        }
    }
    /**
     * true to display the edges of the frustum
     */
    get showLines() {
        return this._showLines;
    }
    set showLines(show) {
        if (this._showLines === show) {
            return;
        }
        this._showLines = show;
        for (let i = 0; i < 6; ++i) {
            this._lightHelperFrustumMeshes[i].setEnabled(show);
        }
    }
    /**
     * true to display the planes of the frustum
     */
    get showPlanes() {
        return this._showPlanes;
    }
    set showPlanes(show) {
        if (this._showPlanes === show) {
            return;
        }
        this._showPlanes = show;
        for (let i = 6; i < 12; ++i) {
            this._lightHelperFrustumMeshes[i].setEnabled(show);
        }
    }
    /**
     * Creates a new frustum viewer
     * @param light directional light to display the frustum for
     * @param camera camera used to retrieve the minZ / maxZ values if the shadowMinZ/shadowMaxZ values of the light are not setup
     */
    constructor(light, camera) {
        this._oldPosition = new Vector3(Number.NaN, Number.NaN, Number.NaN);
        this._oldDirection = new Vector3(Number.NaN, Number.NaN, Number.NaN);
        this._transparency = 0.3;
        this._showLines = true;
        this._showPlanes = true;
        this._scene = light.getScene();
        this._light = light;
        this._camera = camera;
        this._inverseViewMatrix = Matrix.Identity();
        this._lightHelperFrustumMeshes = [];
        this._createGeometry();
        this.show();
        this.update();
    }
    /**
     * Shows the frustum
     */
    show() {
        this._lightHelperFrustumMeshes.forEach((mesh, index) => {
            mesh.setEnabled((index < 6 && this._showLines) || (index >= 6 && this._showPlanes));
        });
        this._oldPosition.set(Number.NaN, Number.NaN, Number.NaN);
        this._visible = true;
    }
    /**
     * Hides the frustum
     */
    hide() {
        this._lightHelperFrustumMeshes.forEach((mesh) => {
            mesh.setEnabled(false);
        });
        this._visible = false;
    }
    /**
     * Updates the frustum.
     * Call this method to update the frustum view if the light has changed position/direction
     */
    update() {
        if (!this._visible) {
            return;
        }
        if (this._oldPosition.equals(this._light.position) &&
            this._oldDirection.equals(this._light.direction) &&
            this._oldAutoCalc === this._light.autoCalcShadowZBounds &&
            this._oldMinZ === this._light.shadowMinZ &&
            this._oldMaxZ === this._light.shadowMaxZ) {
            return;
        }
        this._oldPosition.copyFrom(this._light.position);
        this._oldDirection.copyFrom(this._light.direction);
        this._oldAutoCalc = this._light.autoCalcShadowZBounds;
        this._oldMinZ = this._light.shadowMinZ;
        this._oldMaxZ = this._light.shadowMaxZ;
        TmpVectors.Vector3[0].set(this._light.orthoLeft, this._light.orthoBottom, this._light.shadowMinZ !== undefined ? this._light.shadowMinZ : this._camera.minZ); // min light extents
        TmpVectors.Vector3[1].set(this._light.orthoRight, this._light.orthoTop, this._light.shadowMaxZ !== undefined ? this._light.shadowMaxZ : this._camera.maxZ); // max light extents
        const invLightView = this._getInvertViewMatrix();
        TmpVectors.Vector3[2].copyFromFloats(TmpVectors.Vector3[1].x, TmpVectors.Vector3[1].y, TmpVectors.Vector3[0].z); // n1
        TmpVectors.Vector3[3].copyFromFloats(TmpVectors.Vector3[1].x, TmpVectors.Vector3[0].y, TmpVectors.Vector3[0].z); // n2
        TmpVectors.Vector3[4].copyFromFloats(TmpVectors.Vector3[0].x, TmpVectors.Vector3[0].y, TmpVectors.Vector3[0].z); // n3
        TmpVectors.Vector3[5].copyFromFloats(TmpVectors.Vector3[0].x, TmpVectors.Vector3[1].y, TmpVectors.Vector3[0].z); // n4
        Vector3.TransformCoordinatesToRef(TmpVectors.Vector3[2], invLightView, TmpVectors.Vector3[2]); // near1
        Vector3.TransformCoordinatesToRef(TmpVectors.Vector3[3], invLightView, TmpVectors.Vector3[3]); // near2
        Vector3.TransformCoordinatesToRef(TmpVectors.Vector3[4], invLightView, TmpVectors.Vector3[4]); // near3
        Vector3.TransformCoordinatesToRef(TmpVectors.Vector3[5], invLightView, TmpVectors.Vector3[5]); // near4
        TmpVectors.Vector3[6].copyFromFloats(TmpVectors.Vector3[1].x, TmpVectors.Vector3[1].y, TmpVectors.Vector3[1].z); // f1
        TmpVectors.Vector3[7].copyFromFloats(TmpVectors.Vector3[1].x, TmpVectors.Vector3[0].y, TmpVectors.Vector3[1].z); // f2
        TmpVectors.Vector3[8].copyFromFloats(TmpVectors.Vector3[0].x, TmpVectors.Vector3[0].y, TmpVectors.Vector3[1].z); // f3
        TmpVectors.Vector3[9].copyFromFloats(TmpVectors.Vector3[0].x, TmpVectors.Vector3[1].y, TmpVectors.Vector3[1].z); // f4
        Vector3.TransformCoordinatesToRef(TmpVectors.Vector3[6], invLightView, TmpVectors.Vector3[6]); // far1
        Vector3.TransformCoordinatesToRef(TmpVectors.Vector3[7], invLightView, TmpVectors.Vector3[7]); // far2
        Vector3.TransformCoordinatesToRef(TmpVectors.Vector3[8], invLightView, TmpVectors.Vector3[8]); // far3
        Vector3.TransformCoordinatesToRef(TmpVectors.Vector3[9], invLightView, TmpVectors.Vector3[9]); // far4
        CreateLines("nearlines", { updatable: true, points: this._nearLinesPoints, instance: this._lightHelperFrustumMeshes[0] }, this._scene);
        CreateLines("farlines", { updatable: true, points: this._farLinesPoints, instance: this._lightHelperFrustumMeshes[1] }, this._scene);
        CreateLines("trlines", { updatable: true, points: this._trLinesPoints, instance: this._lightHelperFrustumMeshes[2] }, this._scene);
        CreateLines("brlines", { updatable: true, points: this._brLinesPoints, instance: this._lightHelperFrustumMeshes[3] }, this._scene);
        CreateLines("tllines", { updatable: true, points: this._tlLinesPoints, instance: this._lightHelperFrustumMeshes[4] }, this._scene);
        CreateLines("bllines", { updatable: true, points: this._blLinesPoints, instance: this._lightHelperFrustumMeshes[5] }, this._scene);
        TmpVectors.Vector3[2].toArray(this._nearPlaneVertices, 0);
        TmpVectors.Vector3[3].toArray(this._nearPlaneVertices, 3);
        TmpVectors.Vector3[4].toArray(this._nearPlaneVertices, 6);
        TmpVectors.Vector3[5].toArray(this._nearPlaneVertices, 9);
        this._lightHelperFrustumMeshes[6].geometry?.updateVerticesDataDirectly("position", this._nearPlaneVertices, 0);
        TmpVectors.Vector3[6].toArray(this._farPlaneVertices, 0);
        TmpVectors.Vector3[7].toArray(this._farPlaneVertices, 3);
        TmpVectors.Vector3[8].toArray(this._farPlaneVertices, 6);
        TmpVectors.Vector3[9].toArray(this._farPlaneVertices, 9);
        this._lightHelperFrustumMeshes[7].geometry?.updateVerticesDataDirectly("position", this._farPlaneVertices, 0);
        TmpVectors.Vector3[2].toArray(this._rightPlaneVertices, 0);
        TmpVectors.Vector3[6].toArray(this._rightPlaneVertices, 3);
        TmpVectors.Vector3[7].toArray(this._rightPlaneVertices, 6);
        TmpVectors.Vector3[3].toArray(this._rightPlaneVertices, 9);
        this._lightHelperFrustumMeshes[8].geometry?.updateVerticesDataDirectly("position", this._rightPlaneVertices, 0);
        TmpVectors.Vector3[5].toArray(this._leftPlaneVertices, 0);
        TmpVectors.Vector3[9].toArray(this._leftPlaneVertices, 3);
        TmpVectors.Vector3[8].toArray(this._leftPlaneVertices, 6);
        TmpVectors.Vector3[4].toArray(this._leftPlaneVertices, 9);
        this._lightHelperFrustumMeshes[9].geometry?.updateVerticesDataDirectly("position", this._leftPlaneVertices, 0);
        TmpVectors.Vector3[2].toArray(this._topPlaneVertices, 0);
        TmpVectors.Vector3[6].toArray(this._topPlaneVertices, 3);
        TmpVectors.Vector3[9].toArray(this._topPlaneVertices, 6);
        TmpVectors.Vector3[5].toArray(this._topPlaneVertices, 9);
        this._lightHelperFrustumMeshes[10].geometry?.updateVerticesDataDirectly("position", this._topPlaneVertices, 0);
        TmpVectors.Vector3[3].toArray(this._bottomPlaneVertices, 0);
        TmpVectors.Vector3[7].toArray(this._bottomPlaneVertices, 3);
        TmpVectors.Vector3[8].toArray(this._bottomPlaneVertices, 6);
        TmpVectors.Vector3[4].toArray(this._bottomPlaneVertices, 9);
        this._lightHelperFrustumMeshes[11].geometry?.updateVerticesDataDirectly("position", this._bottomPlaneVertices, 0);
    }
    /**
     * Dispose of the class / remove the frustum view
     */
    dispose() {
        this._lightHelperFrustumMeshes.forEach((mesh) => {
            mesh.material?.dispose();
            mesh.dispose();
        });
        this._rootNode.dispose();
    }
    _createGeometry() {
        this._rootNode = new TransformNode("directionalLightHelperRoot_" + this._light.name, this._scene);
        this._rootNode.parent = this._light.parent;
        this._nearLinesPoints = [TmpVectors.Vector3[0], TmpVectors.Vector3[1], TmpVectors.Vector3[2], TmpVectors.Vector3[3], TmpVectors.Vector3[4]];
        const nearLines = CreateLines("nearlines", { updatable: true, points: this._nearLinesPoints }, this._scene);
        nearLines.parent = this._rootNode;
        nearLines.alwaysSelectAsActiveMesh = true;
        this._farLinesPoints = [TmpVectors.Vector3[5], TmpVectors.Vector3[6], TmpVectors.Vector3[7], TmpVectors.Vector3[8], TmpVectors.Vector3[9]];
        const farLines = CreateLines("farlines", { updatable: true, points: this._farLinesPoints }, this._scene);
        farLines.parent = this._rootNode;
        farLines.alwaysSelectAsActiveMesh = true;
        this._trLinesPoints = [TmpVectors.Vector3[10], TmpVectors.Vector3[11]];
        const trLines = CreateLines("trlines", { updatable: true, points: this._trLinesPoints }, this._scene);
        trLines.parent = this._rootNode;
        trLines.alwaysSelectAsActiveMesh = true;
        this._brLinesPoints = [TmpVectors.Vector3[12], TmpVectors.Vector3[0]];
        const brLines = CreateLines("brlines", { updatable: true, points: this._brLinesPoints }, this._scene);
        brLines.parent = this._rootNode;
        brLines.alwaysSelectAsActiveMesh = true;
        this._tlLinesPoints = [TmpVectors.Vector3[1], TmpVectors.Vector3[2]];
        const tlLines = CreateLines("tllines", { updatable: true, points: this._tlLinesPoints }, this._scene);
        tlLines.parent = this._rootNode;
        tlLines.alwaysSelectAsActiveMesh = true;
        this._blLinesPoints = [TmpVectors.Vector3[3], TmpVectors.Vector3[4]];
        const blLines = CreateLines("bllines", { updatable: true, points: this._blLinesPoints }, this._scene);
        blLines.parent = this._rootNode;
        blLines.alwaysSelectAsActiveMesh = true;
        this._lightHelperFrustumMeshes.push(nearLines, farLines, trLines, brLines, tlLines, blLines);
        const makePlane = (name, color, positions) => {
            const plane = new Mesh(name + "plane", this._scene);
            const mat = new StandardMaterial(name + "PlaneMat", this._scene);
            plane.material = mat;
            plane.parent = this._rootNode;
            plane.alwaysSelectAsActiveMesh = true;
            mat.emissiveColor = color;
            mat.alpha = this.transparency;
            mat.backFaceCulling = false;
            mat.disableLighting = true;
            const indices = [0, 1, 2, 0, 2, 3];
            const vertexData = new VertexData();
            vertexData.positions = positions;
            vertexData.indices = indices;
            vertexData.applyToMesh(plane, true);
            this._lightHelperFrustumMeshes.push(plane);
        };
        this._nearPlaneVertices = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
        this._farPlaneVertices = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
        this._rightPlaneVertices = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
        this._leftPlaneVertices = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
        this._topPlaneVertices = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
        this._bottomPlaneVertices = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
        makePlane("near", new Color3(1, 0, 0), this._nearPlaneVertices);
        makePlane("far", new Color3(0.3, 0, 0), this._farPlaneVertices);
        makePlane("right", new Color3(0, 1, 0), this._rightPlaneVertices);
        makePlane("left", new Color3(0, 0.3, 0), this._leftPlaneVertices);
        makePlane("top", new Color3(0, 0, 1), this._topPlaneVertices);
        makePlane("bottom", new Color3(0, 0, 0.3), this._bottomPlaneVertices);
        this._nearLinesPoints[0] = TmpVectors.Vector3[2];
        this._nearLinesPoints[1] = TmpVectors.Vector3[3];
        this._nearLinesPoints[2] = TmpVectors.Vector3[4];
        this._nearLinesPoints[3] = TmpVectors.Vector3[5];
        this._nearLinesPoints[4] = TmpVectors.Vector3[2];
        this._farLinesPoints[0] = TmpVectors.Vector3[6];
        this._farLinesPoints[1] = TmpVectors.Vector3[7];
        this._farLinesPoints[2] = TmpVectors.Vector3[8];
        this._farLinesPoints[3] = TmpVectors.Vector3[9];
        this._farLinesPoints[4] = TmpVectors.Vector3[6];
        this._trLinesPoints[0] = TmpVectors.Vector3[2];
        this._trLinesPoints[1] = TmpVectors.Vector3[6];
        this._brLinesPoints[0] = TmpVectors.Vector3[3];
        this._brLinesPoints[1] = TmpVectors.Vector3[7];
        this._tlLinesPoints[0] = TmpVectors.Vector3[4];
        this._tlLinesPoints[1] = TmpVectors.Vector3[8];
        this._blLinesPoints[0] = TmpVectors.Vector3[5];
        this._blLinesPoints[1] = TmpVectors.Vector3[9];
    }
    _getInvertViewMatrix() {
        Matrix.LookAtLHToRef(this._light.position, this._light.position.add(this._light.direction), Vector3.UpReadOnly, this._inverseViewMatrix);
        this._inverseViewMatrix.invertToRef(this._inverseViewMatrix);
        return this._inverseViewMatrix;
    }
}
//# sourceMappingURL=directionalLightFrustumViewer.js.map