From ccb8b358d3897ad425180b6fb7b99a164f860346 Mon Sep 17 00:00:00 2001
From: Onek8 <mail@1k8.org>
Date: Wed, 2 Jul 2025 05:11:23 +0000
Subject: [PATCH] t3du - Restore VR code

---
 leenkx/Sources/iron/RenderPath.hx | 44 ++++++++++++++++++++++++++-----
 1 file changed, 38 insertions(+), 6 deletions(-)

diff --git a/leenkx/Sources/iron/RenderPath.hx b/leenkx/Sources/iron/RenderPath.hx
index 17cb5dd..dcfd92e 100644
--- a/leenkx/Sources/iron/RenderPath.hx
+++ b/leenkx/Sources/iron/RenderPath.hx
@@ -518,12 +518,44 @@ class RenderPath {
 		return Reflect.field(kha.Shaders, handle + "_comp");
 	}
 
-	#if (kha_krom && lnx_vr)
-	public function drawStereo(drawMeshes: Int->Void) {
-		for (eye in 0...2) {
-			Krom.vrBeginRender(eye);
-			drawMeshes(eye);
-			Krom.vrEndRender(eye);
+	#if lnx_vr
+	public function drawStereo(drawMeshes: Void->Void) {
+		var vr = kha.vr.VrInterface.instance;
+		var appw = iron.App.w();
+		var apph = iron.App.h();
+		var halfw = Std.int(appw / 2);
+		var g = currentG;
+
+		if (vr != null && vr.IsPresenting()) {
+			// Left eye
+			Scene.active.camera.V.setFrom(Scene.active.camera.leftV);
+			Scene.active.camera.P.self = vr.GetProjectionMatrix(0);
+			g.viewport(0, 0, halfw, apph);
+			drawMeshes();
+
+			// Right eye
+			begin(g, additionalTargets);
+			Scene.active.camera.V.setFrom(Scene.active.camera.rightV);
+			Scene.active.camera.P.self = vr.GetProjectionMatrix(1);
+			g.viewport(halfw, 0, halfw, apph);
+			drawMeshes();
+		}
+		else { // Simulate
+			Scene.active.camera.buildProjection(halfw / apph);
+
+			// Left eye
+			g.viewport(0, 0, halfw, apph);
+			drawMeshes();
+
+			// Right eye
+			begin(g, additionalTargets);
+			Scene.active.camera.transform.move(Scene.active.camera.right(), 0.032);
+			Scene.active.camera.buildMatrix();
+			g.viewport(halfw, 0, halfw, apph);
+			drawMeshes();
+
+			Scene.active.camera.transform.move(Scene.active.camera.right(), -0.032);
+			Scene.active.camera.buildMatrix();
 		}
 	}
 	#end