Fixed coordinate transformation for skybox and reflection objects

Matched HLSL and GLSL shaders
Fixes #757

data/shaders/glsl/texturecubemaparray/reflect.frag

@@ -24,7 +24,7 @@ void main()
 	vec3 cR = reflect (cI, normalize(inNormal));
 
 	cR = vec3(ubo.invModel * vec4(cR, 0.0));
-	cR.y *= -1.0;
+	cR.yz *= -1.0;
 
 	vec4 color = textureLod(samplerCubeMapArray, vec4(cR, ubo.cubeMapIndex), ubo.lodBias);
 

data/shaders/glsl/texturecubemaparray/skybox.vert

@@ -16,5 +16,6 @@ layout (location = 0) out vec3 outUVW;
 void main() 
 {
 	outUVW = inPos;
+	outUVW.yz *= -1.0f;
 	gl_Position = ubo.projection * ubo.model * vec4(inPos.xyz, 1.0);
 }

data/shaders/hlsl/texturecubemaparray/reflect.frag

@@ -25,11 +25,11 @@ struct VSOutput
 
 float4 main(VSOutput input) : SV_TARGET
 {
-	float3 cI = normalize (input.ViewVec);
+	float3 cI = normalize (input.Pos);
 	float3 cR = reflect (cI, normalize(input.Normal));
 
 	cR = mul(ubo.invModel, float4(cR, 0.0)).xyz;
-	cR *= float3(-1.0, 1.0, -1.0);
+	cR *= float3(1.0, -1.0, -1.0);
 
 	float4 color = textureCubeMapArray.SampleLevel(samplerCubeMapArray, float4(cR, ubo.cubeMapIndex), input.LodBias);
 

data/shaders/hlsl/texturecubemaparray/skybox.vert

@@ -21,7 +21,7 @@ VSOutput main([[vk::location(0)]] float3 Pos : POSITION0)
 {
 	VSOutput output = (VSOutput)0;
 	output.UVW = Pos;
-	output.UVW.y *= -1.0;
+	output.UVW.yz *= -1.0;
 	output.Pos = mul(ubo.projection, mul(ubo.model, float4(Pos.xyz, 1.0)));
 	return output;
 }

examples/texturecubemaparray/texturecubemaparray.cpp

@@ -59,7 +59,6 @@ public:
 		title = "Cube map textures";
 		camera.type = Camera::CameraType::lookat;
 		camera.setPosition(glm::vec3(0.0f, 0.0f, -4.0f));
-		camera.setRotation(glm::vec3(-7.25f, -120.0f, 0.0f));
 		camera.setRotationSpeed(0.25f);
 		camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 256.0f);
 		settings.overlay = true;