Use textureLod instead of the texture

texture() compiles to OpImageSampleImplicitLod, which needs screen-space derivatives of the UV
if (rayQueryGetIntersectionTypeEXT(...) != ...NoneEXT) is per pixel
ray query. one pixel ray query of the quad can hit while neighor misses.

So the divergent branch does not match the texture, should use
textureLod which does not require the screen-space derivatives of quad
pixels.

Author: jiaolu

shaders/mobile_nerf_rayquery/rayquery_morpheus.frag

@@ -259,7 +259,7 @@ void main(void)
 
           // Sample feature maps and check transparency
           const vec2 flipped = vec2( hitpoint_uv.x, 1.0 - hitpoint_uv.y );
-          vec4 test_pixel = texture(textureInput_0[nonuniformEXT(instanceID)], flipped);
+          vec4 test_pixel = textureLod(textureInput_0[nonuniformEXT(instanceID)], flipped, 0);
 
           if (test_pixel.r != 0.0) {
             rayQueryConfirmIntersectionEXT(rayQuery);
@@ -272,7 +272,7 @@ void main(void)
 
     if (rayQueryGetIntersectionTypeEXT(rayQuery, true) == gl_RayQueryCommittedIntersectionTriangleEXT) {
       // Output feature inputs for mlp
-      vec4 pixel_1 = texture(textureInput_1[nonuniformEXT(commited_instanceID)], commited_flipped);
+      vec4 pixel_1 = textureLod(textureInput_1[nonuniformEXT(commited_instanceID)], commited_flipped, 0);
 
       pixel_0.a = pixel_0.a*2.0-1.0;
       pixel_1.a = pixel_1.a*2.0-1.0;
@@ -327,8 +327,8 @@ void main(void)
 
       // Sample feature maps then output to second subpass
       vec2 flipped = vec2( hitpoint_uv.x, 1.0 - hitpoint_uv.y );
-      vec4 pixel_0 = texture(textureInput_0[nonuniformEXT(instanceID)], flipped);
-      vec4 pixel_1 = texture(textureInput_1[nonuniformEXT(instanceID)], flipped);
+      vec4 pixel_0 = textureLod(textureInput_0[nonuniformEXT(instanceID)], flipped, 0);
+      vec4 pixel_1 = textureLod(textureInput_1[nonuniformEXT(instanceID)], flipped, 0);
 
       pixel_0.a = pixel_0.a*2.0-1.0;
       pixel_1.a = pixel_1.a*2.0-1.0;

shaders/mobile_nerf_rayquery/rayquery_morpheus_combo.frag

@@ -259,7 +259,7 @@ void main(void)
 
           // Sample feature maps and check transparency
           const vec2 flipped = vec2( hitpoint_uv.x, 1.0 - hitpoint_uv.y );
-          vec4 test_pixel = texture(textureInput_0[nonuniformEXT(instanceID)], flipped);
+          vec4 test_pixel = textureLod(textureInput_0[nonuniformEXT(instanceID)], flipped, 0);
 
           if (test_pixel.r != 0.0) {
             rayQueryConfirmIntersectionEXT(rayQuery);
@@ -272,7 +272,7 @@ void main(void)
 
     if (rayQueryGetIntersectionTypeEXT(rayQuery, true) == gl_RayQueryCommittedIntersectionTriangleEXT) {
       // Output feature inputs for mlp
-      vec4 pixel_1 = texture(textureInput_1[nonuniformEXT(commited_instanceID)], commited_flipped);
+      vec4 pixel_1 = textureLod(textureInput_1[nonuniformEXT(commited_instanceID)], commited_flipped, 0);
 
       pixel_0.a = pixel_0.a*2.0-1.0;
       pixel_1.a = pixel_1.a*2.0-1.0;
@@ -327,16 +327,16 @@ void main(void)
 
       // Sample feature maps then output to second subpass
       const vec2 flipped = vec2( hitpoint_uv.x, 1.0 - hitpoint_uv.y );
-      vec4 pixel_0 = texture(textureInput_0[nonuniformEXT(instanceID)], flipped);
-      vec4 pixel_1 = texture(textureInput_1[nonuniformEXT(instanceID)], flipped);
+      vec4 pixel_0 = textureLod(textureInput_0[nonuniformEXT(instanceID)], flipped, 0);
+      vec4 pixel_1 = textureLod(textureInput_1[nonuniformEXT(instanceID)], flipped, 0);
 
       pixel_0.a = pixel_0.a*2.0-1.0;
       pixel_1.a = pixel_1.a*2.0-1.0;
 
       o_color.rgb = Convert_sRGB_ToLinear(evaluateNetwork(pixel_0, pixel_1, vec4(rayDirection, 1.0f), instanceID));
       o_color.a = 1.0;
     } else {
-      discard;
+        discard;
     }
 }
 #endif