How to write a Custom Car paint Material supporting Normal mapping in Qt 3D Studio

Ed01

Here is my code but I don't have the normal applied to the base color:

// add enum defines
#define mono_alpha 0
#define mono_average 1
#define mono_luminance 2
#define mono_maximum 3
#define wrap_clamp 0
#define wrap_repeat 1
#define wrap_mirrored_repeat 2
#define gamma_default 0
#define gamma_linear 1
#define gamma_srgb 2
#define texture_coordinate_uvw 0
#define texture_coordinate_world 1
#define texture_coordinate_object 2
#define scatter_reflect 0
#define scatter_transmit 1
#define scatter_reflect_transmit 2

#define QT3DS_ENABLE_UV0 1
#define QT3DS_ENABLE_WORLD_POSITION 1
#define QT3DS_ENABLE_TEXTAN 1
#define QT3DS_ENABLE_BINORMAL 1

#include "vertexFragmentBase.glsllib"

// set shader output
out vec4 fragColor;

// add structure defines
struct layer_result
{
vec4 base;
vec4 layer;
mat3 tanFrame;
};

struct texture_coordinate_info
{
vec3 position;
vec3 tangent_u;
vec3 tangent_v;
};

struct texture_return
{
vec3 tint;
float mono;
};

// temporary declarations
texture_coordinate_info tmp2;
texture_coordinate_info tmp3;
texture_return tmp4;
vec3 tmp5;
vec3 ftmp0;
vec3 ftmp1;
float ftmp2;
float ftmp3;
vec4 tmpShadowTerm;

layer_result layers[3];

#include "SSAOCustomMaterial.glsllib"
#include "sampleLight.glsllib"
#include "sampleProbe.glsllib"
#include "sampleArea.glsllib"
#include "cube.glsllib"
#include "random255.glsllib"
#include "perlinNoise.glsllib"
#include "perlinNoiseBumpTexture.glsllib"
#include "coordinateSource.glsllib"
#include "square.glsllib"
#include "calculateRoughness.glsllib"
#include "evalBakedShadowMap.glsllib"
#include "evalEnvironmentMap.glsllib"
#include "luminance.glsllib"
#include "monoChannel.glsllib"
#include "fileTexture.glsllib"
#include "transformCoordinate.glsllib"
#include "rotationTranslationScale.glsllib"
#include "textureCoordinateInfo.glsllib"
#include "tangentSpaceNormalTexture.glsllib"
#include "microfacetBSDF.glsllib"
#include "physGlossyBSDF.glsllib"
#include "simpleGlossyBSDF.glsllib"
#include "weightedLayer.glsllib"
#include "miNoise.glsllib"
#include "flakeNoiseBumpTexture.glsllib"
#include "flakeNoiseTexture.glsllib"
#include "diffuseReflectionBSDF.glsllib"
#include "fresnelLayer.glsllib"

bool evalTwoSided()
{
return( false );
}

vec3 computeFrontMaterialEmissive()
{
return( vec3( 0, 0, 0 ) );
}

void computeFrontLayerColor( in vec3 normal, in vec3 lightDir, in vec3 viewDir, in vec3 lightDiffuse, in vec3 lightSpecular, in float materialIOR, float aoFactor )
{
#if QT3DS_ENABLE_CG_LIGHTING
layers[0].layer += tmpShadowTerm * microfacetBSDF( layers[0].tanFrame, lightDir, viewDir, lightSpecular, materialIOR, coat_roughness, coat_roughness, scatter_reflect );

layers[1].layer += tmpShadowTerm * microfacetBSDF( layers[1].tanFrame, lightDir, viewDir, lightSpecular, materialIOR, flake_roughness, flake_roughness, scatter_reflect );

layers[2].base += tmpShadowTerm * diffuseReflectionBSDF( normal, lightDir, lightDiffuse );
layers[2].layer += tmpShadowTerm * microfacetBSDF( layers[2].tanFrame, lightDir, viewDir, lightSpecular, materialIOR, 0.300000, 0.300000, scatter_reflect );

#endif
}

void computeFrontAreaColor( in int lightIdx, in vec4 lightDiffuse, in vec4 lightSpecular )
{
#if QT3DS_ENABLE_CG_LIGHTING
layers[0].layer += tmpShadowTerm * lightSpecular * sampleAreaGlossy( layers[0].tanFrame, varWorldPos, lightIdx, viewDir, coat_roughness, coat_roughness );

layers[1].layer += tmpShadowTerm * lightSpecular * sampleAreaGlossy( layers[1].tanFrame, varWorldPos, lightIdx, viewDir, flake_roughness, flake_roughness );

layers[2].base += tmpShadowTerm * lightDiffuse * sampleAreaDiffuse( layers[2].tanFrame, varWorldPos, lightIdx );
layers[2].layer += tmpShadowTerm * lightSpecular * sampleAreaGlossy( layers[2].tanFrame, varWorldPos, lightIdx, viewDir, 0.300000, 0.300000 );

#endif
}

void computeFrontLayerEnvironment( in vec3 normal, in vec3 viewDir, float aoFactor )
{
#if !QT3DS_ENABLE_LIGHT_PROBE
layers[0].layer += tmpShadowTerm * microfacetSampledBSDF( layers[0].tanFrame, viewDir, coat_roughness, coat_roughness, scatter_reflect );

layers[1].layer += tmpShadowTerm * microfacetSampledBSDF( layers[1].tanFrame, viewDir, flake_roughness, flake_roughness, scatter_reflect );

layers[2].base += tmpShadowTerm * diffuseReflectionBSDFEnvironment( normal, 0.000000 ) * aoFactor;
layers[2].layer += tmpShadowTerm * microfacetSampledBSDF( layers[2].tanFrame, viewDir, 0.300000, 0.300000, scatter_reflect );

#else
layers[0].layer += tmpShadowTerm * sampleGlossy( layers[0].tanFrame, viewDir, coat_roughness );

layers[1].layer += tmpShadowTerm * sampleGlossy( layers[1].tanFrame, viewDir, flake_roughness );

layers[2].base += tmpShadowTerm * sampleDiffuse( layers[2].tanFrame ) * aoFactor;
layers[2].layer += tmpShadowTerm * sampleGlossy( layers[2].tanFrame, viewDir, 0.300000 );

#endif
}

vec3 computeBackMaterialEmissive()
{
return( vec3(0, 0, 0) );
}

void computeBackLayerColor( in vec3 normal, in vec3 lightDir, in vec3 viewDir, in vec3 lightDiffuse, in vec3 lightSpecular, in float materialIOR, float aoFactor )
{
#if QT3DS_ENABLE_CG_LIGHTING
layers[0].base += vec4( 0.0, 0.0, 0.0, 1.0 );
layers[0].layer += vec4( 0.0, 0.0, 0.0, 1.0 );
#endif
}

void computeBackAreaColor( in int lightIdx, in vec4 lightDiffuse, in vec4 lightSpecular )
{
#if QT3DS_ENABLE_CG_LIGHTING
layers[0].base += vec4( 0.0, 0.0, 0.0, 1.0 );
layers[0].layer += vec4( 0.0, 0.0, 0.0, 1.0 );
#endif
}

void computeBackLayerEnvironment( in vec3 normal, in vec3 viewDir, float aoFactor )
{
#if !QT3DS_ENABLE_LIGHT_PROBE
layers[0].base += vec4( 0.0, 0.0, 0.0, 1.0 );
layers[0].layer += vec4( 0.0, 0.0, 0.0, 1.0 );
#else
layers[0].base += vec4( 0.0, 0.0, 0.0, 1.0 );
layers[0].layer += vec4( 0.0, 0.0, 0.0, 1.0 );
#endif
}

float computeIOR()
{
return( false ? 1.0 : luminance( vec3( 1, 1, 1 ) ) );
}

float evalCutout()
{
return( 1.000000 );
}

vec3 computeNormal()
{
return( tangentSpaceNormalTexture( bump_texture, bump_amount, false, false, tmp3, vec2( 0.000000, 1.000000 ), vec2( 0.000000, 1.000000 ), wrap_repeat, wrap_repeat ) );
}

void computeTemporaries()
{
tmp3 = transformCoordinate( rotationTranslationScale( vec3( 0.000000, 0.000000, 0.000000 ), vec3( 0.000000, 0.000000, 0.000000 ), vec3( texture_tiling[0], texture_tiling[1], 1.000000 ) ), textureCoordinateInfo( texCoord0, tangent, binormal ) );
tmp4 = fileTexture(diffuse_texture, vec3( 0, 0, 0 ), vec3( 1, 1, 1 ), mono_luminance, tmp3, vec2( 0.000000, 1.000000 ), vec2( 0.000000, 1.000000 ), wrap_repeat, wrap_repeat, gamma_srgb );
tmp5 = tangentSpaceNormalTexture( bump_texture, bump_amount, false, false, tmp3, vec2( 0.000000, 1.000000 ), vec2( 0.000000, 1.000000 ), wrap_repeat, wrap_repeat );tmp2 = coordinateSource(texture_coordinate_object, 0 );
ftmp0 = tmp4.tint;
ftmp1 = flakeNoiseBumpTexture(tmp2, flake_size, flake_bumpiness, normal );
ftmp2 = flakeNoiseTexture(tmp2, flake_intensity, flake_size, flake_amount ).mono;
ftmp3 = flakeNoiseTexture(tmp2, 0.000000, 0.002200, 1.000000 ).mono;
tmpShadowTerm = evalBakedShadowMap( texCoord0 );
}

vec4 computeLayerWeights( in float alpha )
{
vec4 color;
color = weightedLayer( ftmp3, vec4( vec3( 1, 0.01, 0.01 ), 1.0).rgb, layers[2].layer, layers[2].base * vec4( base_color.rgb, 1.0), alpha );
color = weightedLayer( ftmp2, flake_color.rgb, layers[1].layer, color, color.a );
color = fresnelLayer( ftmp0, vec3( coating_ior ), coat_weight, coat_color.rgb, layers[0].layer, color, color.a );
return color;
}

void initializeLayerVariables(void)
{
// clear layers
layers[0].base = vec4(0.0, 0.0, 0.0, 1.0);
layers[0].layer = vec4(0.0, 0.0, 0.0, 1.0);
layers[0].tanFrame = orthoNormalize( mat3( tangent, cross(ftmp0, tangent), ftmp0 ) );
layers[1].base = vec4(0.0, 0.0, 0.0, 1.0);
layers[1].layer = vec4(0.0, 0.0, 0.0, 1.0);
layers[1].tanFrame = orthoNormalize( mat3( tangent, cross(ftmp1, tangent), ftmp1 ) );
layers[2].base = vec4(0.0, 0.0, 0.0, 1.0);
layers[2].layer = vec4(0.0, 0.0, 0.0, 1.0);
layers[2].tanFrame = orthoNormalize( mat3( tangent, cross(normal, tangent), normal ) );
}

    </FragmentShader>
</Shader>
</Shaders>

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