From 0f73a9dd9f32431d565f94fe2974a67bf263a7bb Mon Sep 17 00:00:00 2001
From: Tim Deubler <tim.deubler@here.com>
Date: Wed, 10 Jul 2024 13:06:27 +0200
Subject: [PATCH] fixed ray intersection on 2d line geometry

Signed-off-by: Tim Deubler <tim.deubler@here.com>
---
 .../webgl/buffer/templates/LineBuffer.ts      | 28 +++++++------------
 1 file changed, 10 insertions(+), 18 deletions(-)

diff --git a/packages/display/src/displays/webgl/buffer/templates/LineBuffer.ts b/packages/display/src/displays/webgl/buffer/templates/LineBuffer.ts
index 80f725f39..e924d1920 100644
--- a/packages/display/src/displays/webgl/buffer/templates/LineBuffer.ts
+++ b/packages/display/src/displays/webgl/buffer/templates/LineBuffer.ts
@@ -74,10 +74,7 @@ export class LineBuffer extends TemplateBuffer {
         const scaleByAltitude = <boolean>buffer.getUniform('u_scaleByAltitude');
         const N_SCALE = 1.0 / 8192.0;
 
-
-        const stride = size * 3;
         let index;
-
         const m3 = rayCaster.sMat[3];
         const m7 = rayCaster.sMat[7];
         const m11 = rayCaster.sMat[11];
@@ -93,13 +90,11 @@ export class LineBuffer extends TemplateBuffer {
             const dy0 = (ny0 & 1) * 2 - 1;
             ny0 = dy0 * (ny0 >> 1) * N_SCALE;
 
-            let x0 = position[i];
-            let y0 = position[i + 1];
-            let z0 = size == 3 ? -position[i + 2] : 0;
+            let x0 = position[i++];
+            let y0 = position[i++];
+            let z0 = size == 3 ? -position[i++] : 0;
             // convert normalized int16 to float meters (-500m ... +9000m)
             // z0 = (z0 - 32267.0) * 0.14496292001098665;
-
-
             let nx1 = normal[n + 4];
             let ny1 = normal[n + 5];
 
@@ -109,9 +104,10 @@ export class LineBuffer extends TemplateBuffer {
             const dy1 = (ny1 & 1) * 2 - 1;
             ny1 = dy1 * (ny1 >> 1) * N_SCALE;
 
-            let x1 = position[i + 3];
-            let y1 = position[i + 4];
-            let z1 = size == 3 ? -position[i + 5] : 0;
+
+            let x1 = position[i++];
+            let y1 = position[i++];
+            let z1 = size == 3 ? -position[i++] : 0;
 
             let nx2 = normal[n + 8];
             let ny2 = normal[n + 9];
@@ -122,10 +118,9 @@ export class LineBuffer extends TemplateBuffer {
             const dy2 = (ny2 & 1) * 2 - 1;
             ny2 = dy2 * (ny2 >> 1) * N_SCALE;
 
-            let x2 = position[i + 6];
-            let y2 = position[i + 7];
-            let z2 = size == 3 ? -position[i + 8] : 0;
-
+            let x2 = position[i++];
+            let y2 = position[i++];
+            let z2 = size == 3 ? -position[i++] : 0;
 
             const tileX0 = tileX + x0;
             const tileY0 = tileY + y0;
@@ -144,15 +139,12 @@ export class LineBuffer extends TemplateBuffer {
             t2[1] = tileY + y2 + ny2 * strokeWidth * scaleDZ;
             t2[2] = z2;
 
-
             let intersectRayLength = Raycaster.rayIntersectsTriangle(
                 rayOrigin,
                 rayDirection,
                 t0, t1, t2
             );
 
-            i += stride;
-
             if (intersectRayLength != null) {
                 if (intersectRayLength <= result.z) {
                     result.z = intersectRayLength;