234 lines
6.3 KiB
Haxe
234 lines
6.3 KiB
Haxe
package iron.object;
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import kha.graphics4.Graphics;
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import kha.graphics4.CubeMap;
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import iron.Scene;
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import iron.RenderPath;
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import iron.math.Mat4;
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import iron.math.Vec4;
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import iron.math.Quat;
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import iron.data.CameraData;
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class CameraObject extends Object {
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public var data: CameraData;
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public var P: Mat4;
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#if lnx_taa
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public var noJitterP = Mat4.identity();
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var frame = 0;
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#end
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public var V: Mat4;
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public var prevV: Mat4 = null;
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public var VP: Mat4;
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public var frustumPlanes: Array<FrustumPlane> = null;
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public var renderTarget: kha.Image = null; // Render camera view to texture
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public var renderTargetCube: CubeMap = null;
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public var currentFace = 0;
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static var temp = new Vec4();
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static var q = new Quat();
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static var sphereCenter = new Vec4();
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static var vcenter = new Vec4();
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static var vup = new Vec4();
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public function new(data: CameraData) {
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super();
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this.data = data;
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buildProjection();
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V = Mat4.identity();
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VP = Mat4.identity();
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if (data.raw.frustum_culling) {
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frustumPlanes = [];
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for (i in 0...6) frustumPlanes.push(new FrustumPlane());
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}
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Scene.active.cameras.push(this);
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}
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public function buildProjection(screenAspect: Null<Float> = null) {
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if (data.raw.ortho != null) {
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P = Mat4.ortho(data.raw.ortho[0], data.raw.ortho[1], data.raw.ortho[2], data.raw.ortho[3], data.raw.near_plane, data.raw.far_plane);
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}
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else {
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if (screenAspect == null) screenAspect = iron.App.w() / iron.App.h();
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var aspect = data.raw.aspect != null ? data.raw.aspect : screenAspect;
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P = Mat4.persp(data.raw.fov, aspect, data.raw.near_plane, data.raw.far_plane);
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}
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#if lnx_taa
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noJitterP.setFrom(P);
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#end
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}
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override public function remove() {
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Scene.active.cameras.remove(this);
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// if (renderTarget != null) renderTarget.unload();
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// if (renderTargetCube != null) renderTargetCube.unload();
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super.remove();
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}
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public function renderFrame(g: Graphics) {
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#if lnx_taa
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projectionJitter();
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#end
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buildMatrix();
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RenderPath.active.renderFrame(g);
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prevV.setFrom(V);
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}
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#if lnx_taa
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function projectionJitter() {
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var w = RenderPath.active.currentW;
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var h = RenderPath.active.currentH;
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P.setFrom(noJitterP);
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var x = 0.0;
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var y = 0.0;
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if (frame % 2 == 0) {
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x = 0.25;
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y = 0.25;
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}
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else {
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x = -0.25;
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y = -0.25;
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}
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P._20 += x / w;
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P._21 += y / h;
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frame++;
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}
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#end
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public function buildMatrix() {
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transform.buildMatrix();
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// Prevent camera matrix scaling
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// TODO: discards position affected by scaled camera parent
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var sc = transform.world.getScale();
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if (sc.x != 1.0 || sc.y != 1.0 || sc.z != 1.0) {
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temp.set(1.0 / sc.x, 1.0 / sc.y, 1.0 / sc.z);
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transform.world.scale(temp);
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}
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V.getInverse(transform.world);
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VP.multmats(P, V);
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if (data.raw.frustum_culling) {
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buildViewFrustum(VP, frustumPlanes);
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}
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// First time setting up previous V, prevents first frame flicker
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if (prevV == null) {
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prevV = Mat4.identity();
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prevV.setFrom(V);
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}
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}
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public static function buildViewFrustum(VP: Mat4, frustumPlanes: Array<FrustumPlane>) {
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// Left plane
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frustumPlanes[0].setComponents(VP._03 + VP._00, VP._13 + VP._10, VP._23 + VP._20, VP._33 + VP._30);
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// Right plane
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frustumPlanes[1].setComponents(VP._03 - VP._00, VP._13 - VP._10, VP._23 - VP._20, VP._33 - VP._30);
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// Top plane
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frustumPlanes[2].setComponents(VP._03 - VP._01, VP._13 - VP._11, VP._23 - VP._21, VP._33 - VP._31);
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// Bottom plane
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frustumPlanes[3].setComponents(VP._03 + VP._01, VP._13 + VP._11, VP._23 + VP._21, VP._33 + VP._31);
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// Near plane
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frustumPlanes[4].setComponents(VP._02, VP._12, VP._22, VP._32);
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// Far plane
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frustumPlanes[5].setComponents(VP._03 - VP._02, VP._13 - VP._12, VP._23 - VP._22, VP._33 - VP._32);
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// Normalize planes
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for (plane in frustumPlanes) plane.normalize();
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}
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public static function sphereInFrustum(frustumPlanes: Array<FrustumPlane>, t: Transform, radiusScale = 1.0, offsetX = 0.0, offsetY = 0.0, offsetZ = 0.0): Bool {
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// Use scale when radius is changing
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var radius = t.radius * radiusScale;
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for (plane in frustumPlanes) {
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sphereCenter.set(t.worldx() + offsetX, t.worldy() + offsetY, t.worldz() + offsetZ);
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// Outside the frustum
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if (plane.distanceToSphere(sphereCenter, radius) + radius * 2 < 0) {
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return false;
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}
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}
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return true;
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}
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public static function setCubeFace(m: Mat4, eye: Vec4, face: Int, flip = false) {
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// Set matrix to match cubemap face
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vcenter.setFrom(eye);
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var f = flip ? -1.0 : 1.0;
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switch (face) {
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case 0: // x+
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vcenter.addf(1.0 * f, 0.0, 0.0);
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vup.set(0.0, -1.0 * f, 0.0);
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case 1: // x-
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vcenter.addf(-1.0 * f, 0.0, 0.0);
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vup.set(0.0, -1.0 * f, 0.0);
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case 2: // y+
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vcenter.addf(0.0, 1.0 * f, 0.0);
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vup.set(0.0, 0.0, 1.0 * f);
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case 3: // y-
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vcenter.addf(0.0, -1.0 * f, 0.0);
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vup.set(0.0, 0.0, -1.0 * f);
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case 4: // z+
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vcenter.addf(0.0, 0.0, 1.0 * f);
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vup.set(0.0, -1.0 * f, 0.0);
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case 5: // z-
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vcenter.addf(0.0, 0.0, -1.0 * f);
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vup.set(0.0, -1.0 * f, 0.0);
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}
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m.setLookAt(eye, vcenter, vup);
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}
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public inline function right(): Vec4 {
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return new Vec4(transform.local._00, transform.local._01, transform.local._02);
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}
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public inline function up(): Vec4 {
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return new Vec4(transform.local._10, transform.local._11, transform.local._12);
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}
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public inline function look(): Vec4 {
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return new Vec4(-transform.local._20, -transform.local._21, -transform.local._22);
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}
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public inline function rightWorld(): Vec4 {
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return new Vec4(transform.world._00, transform.world._01, transform.world._02);
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}
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public inline function upWorld(): Vec4 {
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return new Vec4(transform.world._10, transform.world._11, transform.world._12);
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}
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public inline function lookWorld(): Vec4 {
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return new Vec4(-transform.world._20, -transform.world._21, -transform.world._22);
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}
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}
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class FrustumPlane {
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public var normal = new Vec4(1.0, 0.0, 0.0);
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public var constant = 0.0;
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public function new() {}
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public function normalize() {
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var inverseNormalLength = 1.0 / normal.length();
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normal.mult(inverseNormalLength);
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constant *= inverseNormalLength;
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}
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public function distanceToSphere(sphereCenter: Vec4, sphereRadius: Float): Float {
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return (normal.dot(sphereCenter) + constant) - sphereRadius;
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}
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public inline function setComponents(x: Float, y: Float, z: Float, w: Float) {
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normal.set(x, y, z);
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constant = w;
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}
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}
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