///if (krom_direct3d12 || krom_vulkan || krom_metal)

class RenderPathRaytrace {

	static frame = 0;
	static ready = false;
	static dirty = 0;
	static uvScale = 1.0;
	static path: RenderPath;
	static first = true;
	static f32a = new Float32Array(24);
	static helpMat = Mat4.identity();
	static vb_scale = 1.0;
	static vb: VertexBuffer;
	static ib: IndexBuffer;

	static lastEnvmap: Image = null;
	static isBake = false;

	///if krom_direct3d12
	static ext = ".cso";
	///elseif krom_metal
	static ext = ".metal";
	///else
	static ext = ".spirv";
	///end

	///if is_lab
	static lastTexpaint: Image = null;
	///end

	static init = (_path: RenderPath) => {
		RenderPathRaytrace.path = _path;
	}

	static commands = (useLiveLayer: bool) => {
		if (!RenderPathRaytrace.ready || RenderPathRaytrace.isBake) {
			RenderPathRaytrace.ready = true;
			RenderPathRaytrace.isBake = false;
			let mode = Context.raw.pathTraceMode == PathTraceMode.TraceCore ? "core" : "full";
			RenderPathRaytrace.raytraceInit("raytrace_brute_" + mode + RenderPathRaytrace.ext);
			RenderPathRaytrace.lastEnvmap = null;
		}

		if (!Context.raw.envmapLoaded) {
			Context.loadEnvmap();
			Context.updateEnvmap();
		}

		let probe = Scene.active.world.probe;
		let savedEnvmap = Context.raw.showEnvmapBlur ? probe.radianceMipmaps[0] : Context.raw.savedEnvmap;

		if (RenderPathRaytrace.lastEnvmap != savedEnvmap) {
			RenderPathRaytrace.lastEnvmap = savedEnvmap;

			let bnoise_sobol = Scene.active.embedded.get("bnoise_sobol.k");
			let bnoise_scramble = Scene.active.embedded.get("bnoise_scramble.k");
			let bnoise_rank = Scene.active.embedded.get("bnoise_rank.k");

			let l = Base.flatten(true);
			Krom.raytraceSetTextures(l.texpaint, l.texpaint_nor, l.texpaint_pack, savedEnvmap.texture_, bnoise_sobol.texture_, bnoise_scramble.texture_, bnoise_rank.texture_);
		}

		///if is_lab
		let l = Base.flatten(true);
		if (l.texpaint != RenderPathRaytrace.lastTexpaint) {
			RenderPathRaytrace.lastTexpaint = l.texpaint;

			let bnoise_sobol = Scene.active.embedded.get("bnoise_sobol.k");
			let bnoise_scramble = Scene.active.embedded.get("bnoise_scramble.k");
			let bnoise_rank = Scene.active.embedded.get("bnoise_rank.k");

			Krom.raytraceSetTextures(l.texpaint, l.texpaint_nor, l.texpaint_pack, savedEnvmap.texture_, bnoise_sobol.texture_, bnoise_scramble.texture_, bnoise_rank.texture_);
		}
		///end

		if (Context.raw.pdirty > 0 || RenderPathRaytrace.dirty > 0) {
			Base.flatten(true);
		}

		let cam = Scene.active.camera;
		let ct = cam.transform;
		RenderPathRaytrace.helpMat.setFrom(cam.V);
		RenderPathRaytrace.helpMat.multmat(cam.P);
		RenderPathRaytrace.helpMat.getInverse(RenderPathRaytrace.helpMat);
		RenderPathRaytrace.f32a[0] = ct.worldx();
		RenderPathRaytrace.f32a[1] = ct.worldy();
		RenderPathRaytrace.f32a[2] = ct.worldz();
		RenderPathRaytrace.f32a[3] = RenderPathRaytrace.frame;
		///if krom_metal
		// frame = (frame % (16)) + 1; // _PAINT
		RenderPathRaytrace.frame = RenderPathRaytrace.frame + 1; // _RENDER
		///else
		RenderPathRaytrace.frame = (RenderPathRaytrace.frame % 4) + 1; // _PAINT
		// frame = frame + 1; // _RENDER
		///end
		RenderPathRaytrace.f32a[4] = RenderPathRaytrace.helpMat._00;
		RenderPathRaytrace.f32a[5] = RenderPathRaytrace.helpMat._01;
		RenderPathRaytrace.f32a[6] = RenderPathRaytrace.helpMat._02;
		RenderPathRaytrace.f32a[7] = RenderPathRaytrace.helpMat._03;
		RenderPathRaytrace.f32a[8] = RenderPathRaytrace.helpMat._10;
		RenderPathRaytrace.f32a[9] = RenderPathRaytrace.helpMat._11;
		RenderPathRaytrace.f32a[10] = RenderPathRaytrace.helpMat._12;
		RenderPathRaytrace.f32a[11] = RenderPathRaytrace.helpMat._13;
		RenderPathRaytrace.f32a[12] = RenderPathRaytrace.helpMat._20;
		RenderPathRaytrace.f32a[13] = RenderPathRaytrace.helpMat._21;
		RenderPathRaytrace.f32a[14] = RenderPathRaytrace.helpMat._22;
		RenderPathRaytrace.f32a[15] = RenderPathRaytrace.helpMat._23;
		RenderPathRaytrace.f32a[16] = RenderPathRaytrace.helpMat._30;
		RenderPathRaytrace.f32a[17] = RenderPathRaytrace.helpMat._31;
		RenderPathRaytrace.f32a[18] = RenderPathRaytrace.helpMat._32;
		RenderPathRaytrace.f32a[19] = RenderPathRaytrace.helpMat._33;
		RenderPathRaytrace.f32a[20] = Scene.active.world.probe.raw.strength * 1.5;
		if (!Context.raw.showEnvmap) RenderPathRaytrace.f32a[20] = -RenderPathRaytrace.f32a[20];
		RenderPathRaytrace.f32a[21] = Context.raw.envmapAngle;
		RenderPathRaytrace.f32a[22] = RenderPathRaytrace.uvScale;
		///if is_lab
		RenderPathRaytrace.f32a[22] *= Scene.active.meshes[0].data.scaleTex;
		///end

		let framebuffer = RenderPathRaytrace.path.renderTargets.get("buf").image;
		Krom.raytraceDispatchRays(framebuffer.renderTarget_, RenderPathRaytrace.f32a.buffer);

		if (Context.raw.ddirty == 1 || Context.raw.pdirty == 1) {
			///if krom_metal
			Context.raw.rdirty = 128;
			///else
			Context.raw.rdirty = 4;
			///end
		}
		Context.raw.ddirty--;
		Context.raw.pdirty--;
		Context.raw.rdirty--;

		// Context.raw.ddirty = 1; // _RENDER
	}

	static raytraceInit = (shaderName: string, build = true) => {
		if (RenderPathRaytrace.first) {
			RenderPathRaytrace.first = false;
			Scene.active.embedData("bnoise_sobol.k", () => {});
			Scene.active.embedData("bnoise_scramble.k", () => {});
			Scene.active.embedData("bnoise_rank.k", () => {});
		}

		Data.getBlob(shaderName, (shader: ArrayBuffer) => {
			if (build) RenderPathRaytrace.buildData();
			let bnoise_sobol = Scene.active.embedded.get("bnoise_sobol.k");
			let bnoise_scramble = Scene.active.embedded.get("bnoise_scramble.k");
			let bnoise_rank = Scene.active.embedded.get("bnoise_rank.k");
			Krom.raytraceInit(shader, RenderPathRaytrace.vb.buffer_, RenderPathRaytrace.ib.buffer_, RenderPathRaytrace.vb_scale);
		});
	}

	static buildData = () => {
		if (Context.raw.mergedObject == null) UtilMesh.mergeMesh();
		///if is_paint
		let mo = !Context.layerFilterUsed() ? Context.raw.mergedObject : Context.raw.paintObject;
		///else
		let mo = Scene.active.meshes[0];
		///end
		let md = mo.data;
		let mo_scale = mo.transform.scale.x; // Uniform scale only
		RenderPathRaytrace.vb_scale = md.scalePos * mo_scale;
		if (mo.parent != null) RenderPathRaytrace.vb_scale *= mo.parent.transform.scale.x;
		RenderPathRaytrace.vb = md.vertexBuffer;
		RenderPathRaytrace.ib = md.indexBuffers[0];
	}

	static draw = (useLiveLayer: bool) => {
		let isLive = Config.raw.brush_live && RenderPathPaint.liveLayerDrawn > 0;
		if (Context.raw.ddirty > 1 || Context.raw.pdirty > 0 || isLive) RenderPathRaytrace.frame = 0;

		///if krom_metal
		// Delay path tracing additional samples while painting
		let down = Input.getMouse().down() || Input.getPen().down();
		if (Context.inViewport() && down) RenderPathRaytrace.frame = 0;
		///end

		RenderPathRaytrace.commands(useLiveLayer);

		if (Config.raw.rp_bloom != false) {
			RenderPathBase.drawBloom("buf");
		}
		RenderPathRaytrace.path.setTarget("buf");
		RenderPathRaytrace.path.drawMeshes("overlay");
		RenderPathRaytrace.path.setTarget("buf");
		RenderPathBase.drawCompass(RenderPathRaytrace.path.currentG);
		RenderPathRaytrace.path.setTarget("taa");
		RenderPathRaytrace.path.bindTarget("buf", "tex");
		RenderPathRaytrace.path.drawShader("shader_datas/compositor_pass/compositor_pass");
		RenderPathRaytrace.path.setTarget("");
		RenderPathRaytrace.path.bindTarget("taa", "tex");
		RenderPathRaytrace.path.drawShader("shader_datas/copy_pass/copy_pass");
		if (Config.raw.brush_3d) {
			RenderPathPaint.commandsCursor();
		}
	}
}

///end