WIP material modernization - Added new material attributes

kraken/KRContext.cpp

@@ -340,7 +340,9 @@ KRResource* KRContext::loadResource(const std::string& file_name, Block* data)
     // shader pre-processor options definition file
     resource = m_pSourceManager->load(name, extension, data);
   } else if (extension.compare("mtl") == 0) {
-    resource = m_pMaterialManager->load(name.c_str(), data);
+    resource = m_pMaterialManager->loadResource(name.c_str(), extension, data);
+  } else if (extension.compare("krmaterial") == 0) {
+    resource = m_pMaterialManager->loadResource(name.c_str(), extension, data);
   } else if (extension.compare("mp3") == 0) {
     resource = m_pSoundManager->load(name.c_str(), extension, data);
   } else if (extension.compare("wav") == 0) {

kraken/KRPipeline.cpp

@@ -722,7 +722,7 @@ void KRPipeline::updatePushConstants(KRNode::RenderInfo& ri, const Matrix4& matM
   setPushConstant(ShaderValue::lightmaptexture, 5);
   setPushConstant(ShaderValue::gbuffer_frame, 6);
   setPushConstant(ShaderValue::gbuffer_depth, 7); // Texture unit 7 is used for reading the depth buffer in gBuffer pass #2 and in post-processing pass
-  setPushConstant(ShaderValue::reflectiontexture, 7); // Texture unit 7 is used for the reflection map textures in gBuffer pass #3 and when using forward rendering
+  // setPushConstant(ShaderValue::reflectiontexture, 7); // Texture unit 7 is used for the reflection map textures in gBuffer pass #3 and when using forward rendering
   setPushConstant(ShaderValue::depth_frame, 0);
   setPushConstant(ShaderValue::render_frame, 1);
   setPushConstant(ShaderValue::volumetric_environment_frame, 2);

kraken/KRShaderReflection.h

@@ -53,10 +53,8 @@ enum class ShaderValueType : uint8_t
 
 enum class ShaderValue : uint8_t
 {
-  material_ambient = 0,
-  material_diffuse,
+  material_diffuse = 0,
   material_specular,
-  material_reflection,
   material_alpha,
   material_shininess,
   light_position,
@@ -84,16 +82,13 @@ enum class ShaderValue : uint8_t
   diffusetexture,
   speculartexture,
   reflectioncubetexture,
-  reflectiontexture,
   normaltexture,
   diffusetexture_scale,
   speculartexture_scale,
-  reflectiontexture_scale,
   normaltexture_scale,
   ambienttexture_scale,
   diffusetexture_offset,
   speculartexture_offset,
-  reflectiontexture_offset,
   normaltexture_offset,
   ambienttexture_offset,
   shadow_mvp1,

kraken/resources/material/KRMaterial.cpp

@@ -36,28 +36,28 @@
 #include "KRRenderPass.h"
 
 #include "KRContext.h"
+#include "simdjson.h"
 
 using namespace mimir;
 using namespace hydra;
+using namespace simdjson;
 
-KRMaterial::KRMaterial(KRContext& context, const char* szName)
-  : KRResource(context, szName)
-  , m_ambient{ KRTexture::TEXTURE_USAGE_AMBIENT_MAP, 0, Vector2::Create(0.0f, 0.0f), Vector2::Create(1.0f, 1.0f) }
-  , m_diffuse{ KRTexture::TEXTURE_USAGE_DIFFUSE_MAP, 0, Vector2::Create(0.0f, 0.0f), Vector2::Create(1.0f, 1.0f) }
-  , m_specular{ KRTexture::TEXTURE_USAGE_NORMAL_MAP, 0, Vector2::Create(0.0f, 0.0f), Vector2::Create(1.0f, 1.0f) }
-  , m_reflection{ KRTexture::TEXTURE_USAGE_REFLECTION_MAP, 0, Vector2::Create(0.0f, 0.0f), Vector2::Create(1.0f, 1.0f) }
-  , m_reflectionCube(KRTexture::TEXTURE_USAGE_REFECTION_CUBE)
-  , m_normal{ KRTexture::TEXTURE_USAGE_NORMAL_MAP, 0, Vector2::Create(0.0f, 0.0f), Vector2::Create(1.0f, 1.0f) }
+KRMaterial::KRMaterial(KRContext& context, const char* name)
+  : KRResource(context, name)
 {
-  m_name = szName;
-  m_ambientColor = Vector3::Zero();
-  m_diffuseColor = Vector3::One();
-  m_specularColor = Vector3::One();
-  m_reflectionColor = Vector3::Zero();
-  m_tr = 1.0f;
-  m_ns = 0.0f;
+}
 
-  m_alpha_mode = KRMATERIAL_ALPHA_MODE_OPAQUE;
+KRMaterial::KRMaterial(KRContext& context, std::string name, mimir::Block* data)
+  : KRResource(context, name)
+{
+  simdjson::dom::parser parser;
+  simdjson::dom::element jsonRoot;
+  data->lock();
+  auto error = parser.parse((const char*)data->getStart(), data->getSize()).get(jsonRoot);
+  data->unlock();
+  if (error) {
+    // TODO - Report and handle error
+  }
 }
 
 KRMaterial::~KRMaterial()
@@ -67,21 +67,35 @@ KRMaterial::~KRMaterial()
 
 std::string KRMaterial::getExtension()
 {
-  return "mtl";
+  return "krmaterial";
 }
 
 bool KRMaterial::needsVertexTangents()
 {
-  return m_normal.texture.isSet();
+  return m_normalTexture.texture.isSet();
 }
 
 bool KRMaterial::save(Block& data)
 {
+  simdjson::builder::string_builder sb;
+  sb.start_object();
+  sb.append_key_value<"name">(getName());
+  sb.end_object();
+  const char* str = nullptr;
+  auto error = sb.c_str().get(str);
+  if (error) {
+    return false;
+    // TODO - Report error
+  }
+  data.append(str);
+  return true;
+  /*
+
   std::stringstream stream;
   stream.precision(std::numeric_limits<long double>::digits10);
   stream.setf(std::ios::fixed, std::ios::floatfield);
 
-  stream << "newmtl " << m_name;
+  stream << "newmtl " << getName();
   stream << "\nka " << m_ambientColor.x << " " << m_ambientColor.y << " " << m_ambientColor.z;
   stream << "\nkd " << m_diffuseColor.x << " " << m_diffuseColor.y << " " << m_diffuseColor.z;
   stream << "\nks " << m_specularColor.x << " " << m_specularColor.y << " " << m_specularColor.z;
@@ -118,7 +132,7 @@ bool KRMaterial::save(Block& data)
   } else {
     stream << "\n# map_ReflectionCube cubemapname";
   }
-  switch (m_alpha_mode) {
+  switch (m_alphaMode) {
   case KRMATERIAL_ALPHA_MODE_OPAQUE:
     stream << "\nalpha_mode opaque";
     break;
@@ -136,10 +150,11 @@ bool KRMaterial::save(Block& data)
 
   stream << "\n";
   data.append(stream.str());
-
   return true;
+  */
 }
 
+/*
 void KRMaterial::setAmbientMap(std::string texture_name, Vector2 texture_scale, Vector2 texture_offset)
 {
   m_ambient.texture.set(texture_name);
@@ -179,17 +194,18 @@ void KRMaterial::setReflectionCube(std::string texture_name)
 {
   m_reflectionCube.set(texture_name);
 }
+*/
 
 void KRMaterial::setAlphaMode(KRMaterial::alpha_mode_type alpha_mode)
 {
-  m_alpha_mode = alpha_mode;
+  m_alphaMode = alpha_mode;
 }
 
 KRMaterial::alpha_mode_type KRMaterial::getAlphaMode()
 {
-  return m_alpha_mode;
+  return m_alphaMode;
 }
-
+/*
 void KRMaterial::setAmbient(const Vector3& c)
 {
   m_ambientColor = c;
@@ -209,63 +225,94 @@ void KRMaterial::setReflection(const Vector3& c)
 {
   m_reflectionColor = c;
 }
+*/
 
 void KRMaterial::setTransparency(float a)
 {
-  if (a < 1.0f && m_alpha_mode == KRMaterial::KRMATERIAL_ALPHA_MODE_OPAQUE) {
-    setAlphaMode(KRMaterial::KRMATERIAL_ALPHA_MODE_BLENDONESIDE);
+  if (a < 1.0f && m_alphaMode == KRMaterial::KRMATERIAL_ALPHA_MODE_OPAQUE) {
+    setAlphaMode(KRMaterial::KRMATERIAL_ALPHA_MODE_BLEND);
   }
-  m_tr = a;
+  m_baseColorFactor[3] = a;
 }
 
 void KRMaterial::setShininess(float s)
 {
-  m_ns = s;
+  m_roughnessFactor = 1.0f - s;
 }
 
 bool KRMaterial::isTransparent()
 {
-  return m_tr < 1.0 || m_alpha_mode == KRMATERIAL_ALPHA_MODE_BLENDONESIDE || m_alpha_mode == KRMATERIAL_ALPHA_MODE_BLENDTWOSIDE;
+  return m_baseColorFactor[3] < 1.0 || m_alphaMode == KRMATERIAL_ALPHA_MODE_BLEND;
 }
 
 void KRMaterial::getResourceBindings(std::list<KRResourceBinding*>& bindings)
 {
   KRResource::getResourceBindings(bindings);
 
-  bindings.push_back(&m_ambient.texture);
-  bindings.push_back(&m_diffuse.texture);
-  bindings.push_back(&m_normal.texture);
-  bindings.push_back(&m_specular.texture);
-  bindings.push_back(&m_reflection.texture);
-  bindings.push_back(&m_reflectionCube);
+  bindings.push_back(&m_baseColorTexture.texture);
+  bindings.push_back(&m_normalTexture.texture);
+  bindings.push_back(&m_emissiveTexture.texture);
+  bindings.push_back(&m_occlusionTexture.texture);
+  bindings.push_back(&m_metalicRoughness.texture);
+  bindings.push_back(&m_anisotropyTexture.texture);
+  bindings.push_back(&m_clearcoatTexture.texture);
+  bindings.push_back(&m_clearcoatRoughnessTexture.texture);
+  bindings.push_back(&m_clearcoatNormalTexture.texture);
+  bindings.push_back(&m_specularTexture.texture);
+  bindings.push_back(&m_specularColorTexture.texture);
+  bindings.push_back(&m_thicknessTexture.texture);
 }
 
 kraken_stream_level KRMaterial::getStreamLevel()
 {
   kraken_stream_level stream_level = kraken_stream_level::STREAM_LEVEL_IN_HQ;
 
-  if (m_ambient.texture.isBound()) {
-    stream_level = KRMIN(stream_level, m_ambient.texture.get()->getStreamLevel());
+  if (m_baseColorTexture.texture.isBound()) {
+    stream_level = KRMIN(stream_level, m_baseColorTexture.texture.get()->getStreamLevel());
   }
 
-  if (m_diffuse.texture.isBound()) {
-    stream_level = KRMIN(stream_level, m_diffuse.texture.get()->getStreamLevel());
+  if (m_normalTexture.texture.isBound()) {
+    stream_level = KRMIN(stream_level, m_normalTexture.texture.get()->getStreamLevel());
   }
 
-  if (m_normal.texture.isBound()) {
-    stream_level = KRMIN(stream_level, m_normal.texture.get()->getStreamLevel());
+  if (m_occlusionTexture.texture.isBound()) {
+    stream_level = KRMIN(stream_level, m_occlusionTexture.texture.get()->getStreamLevel());
   }
 
-  if (m_specular.texture.isBound()) {
-    stream_level = KRMIN(stream_level, m_specular.texture.get()->getStreamLevel());
+  if (m_metalicRoughness.texture.isBound()) {
+    stream_level = KRMIN(stream_level, m_metalicRoughness.texture.get()->getStreamLevel());
   }
 
-  if (m_reflection.texture.isBound()) {
-    stream_level = KRMIN(stream_level, m_reflection.texture.get()->getStreamLevel());
+  if (m_anisotropyTexture.texture.isBound()) {
+    stream_level = KRMIN(stream_level, m_anisotropyTexture.texture.get()->getStreamLevel());
   }
 
-  if (m_reflectionCube.isBound()) {
-    stream_level = KRMIN(stream_level, m_reflectionCube.get()->getStreamLevel());
+  if (m_clearcoatTexture.texture.isBound()) {
+    stream_level = KRMIN(stream_level, m_clearcoatTexture.texture.get()->getStreamLevel());
+  }
+
+  if (m_clearcoatTexture.texture.isBound()) {
+    stream_level = KRMIN(stream_level, m_clearcoatTexture.texture.get()->getStreamLevel());
+  }
+
+  if (m_clearcoatRoughnessTexture.texture.isBound()) {
+    stream_level = KRMIN(stream_level, m_clearcoatRoughnessTexture.texture.get()->getStreamLevel());
+  }
+
+  if (m_clearcoatNormalTexture.texture.isBound()) {
+    stream_level = KRMIN(stream_level, m_clearcoatNormalTexture.texture.get()->getStreamLevel());
+  }
+
+  if (m_specularTexture.texture.isBound()) {
+    stream_level = KRMIN(stream_level, m_specularTexture.texture.get()->getStreamLevel());
+  }
+
+  if (m_specularColorTexture.texture.isBound()) {
+    stream_level = KRMIN(stream_level, m_specularColorTexture.texture.get()->getStreamLevel());
+  }
+
+  if (m_thicknessTexture.texture.isBound()) {
+    stream_level = KRMIN(stream_level, m_thicknessTexture.texture.get()->getStreamLevel());
   }
 
   return stream_level;
@@ -278,14 +325,14 @@ void KRMaterial::bind(KRNode::RenderInfo& ri, ModelFormat modelFormat, __uint32_
   Vector2 default_scale = Vector2::One();
   Vector2 default_offset = Vector2::Zero();
 
-  bool bHasReflection = m_reflectionColor != Vector3::Zero();
-  bool bDiffuseMap = m_diffuse.texture.isBound() && ri.camera->settings.bEnableDiffuseMap;
-  bool bNormalMap = m_normal.texture.isBound() && ri.camera->settings.bEnableNormalMap;
-  bool bSpecMap = m_specular.texture.isBound() && ri.camera->settings.bEnableSpecMap;
-  bool bReflectionMap = m_reflection.texture.isBound() && ri.camera->settings.bEnableReflectionMap && ri.camera->settings.bEnableReflection && bHasReflection;
-  bool bReflectionCubeMap = m_reflectionCube.isBound() && ri.camera->settings.bEnableReflection && bHasReflection;
-  bool bAlphaTest = (m_alpha_mode == KRMATERIAL_ALPHA_MODE_TEST) && bDiffuseMap;
-  bool bAlphaBlend = (m_alpha_mode == KRMATERIAL_ALPHA_MODE_BLENDONESIDE) || (m_alpha_mode == KRMATERIAL_ALPHA_MODE_BLENDTWOSIDE);
+  bool bHasReflection = m_roughnessFactor > 0.f;
+  bool bDiffuseMap = m_baseColorTexture.texture.isBound() && ri.camera->settings.bEnableDiffuseMap;
+  bool bNormalMap = m_normalTexture.texture.isBound() && ri.camera->settings.bEnableNormalMap;
+  bool bSpecMap = false;
+  bool bReflectionMap = false;
+  bool bReflectionCubeMap = false;
+  bool bAlphaTest = m_alphaMode == KRMATERIAL_ALPHA_MODE_TEST;
+  bool bAlphaBlend = m_alphaMode == KRMATERIAL_ALPHA_MODE_BLEND;
 
   PipelineInfo info{};
   std::string shader_name("object");
@@ -302,14 +349,14 @@ void KRMaterial::bind(KRNode::RenderInfo& ri, ModelFormat modelFormat, __uint32_
   info.bReflectionMap = bReflectionMap;
   info.bReflectionCubeMap = bReflectionCubeMap;
   info.bLightMap = bLightMap;
-  info.bDiffuseMapScale = m_diffuse.scale != default_scale && bDiffuseMap;
-  info.bSpecMapScale = m_specular.scale != default_scale && bSpecMap;
-  info.bNormalMapScale = m_normal.scale != default_scale && bNormalMap;
-  info.bReflectionMapScale = m_reflection.scale != default_scale && bReflectionMap;
-  info.bDiffuseMapOffset = m_diffuse.offset != default_offset && bDiffuseMap;
-  info.bSpecMapOffset = m_specular.offset != default_offset && bSpecMap;
-  info.bNormalMapOffset = m_normal.offset != default_offset && bNormalMap;
-  info.bReflectionMapOffset = m_reflection.offset != default_offset && bReflectionMap;
+  info.bDiffuseMapScale = m_baseColorTexture.scale != default_scale && bDiffuseMap;
+  info.bSpecMapScale = false;
+  info.bNormalMapScale = m_normalTexture.scale != default_scale && bNormalMap;
+  info.bReflectionMapScale = false;
+  info.bDiffuseMapOffset = false;
+  info.bSpecMapOffset = false;
+  info.bNormalMapOffset = m_normalTexture.offset != default_offset && bNormalMap;
+  info.bReflectionMapOffset = false;
   info.bAlphaTest = bAlphaTest;
   info.rasterMode = bAlphaBlend ? RasterMode::kAlphaBlend : RasterMode::kOpaque;
   info.renderPass = ri.renderPass;
@@ -352,23 +399,25 @@ void KRMaterial::bind(KRNode::RenderInfo& ri, ModelFormat modelFormat, __uint32_
   }
 
   if (bDiffuseMap) {
-    pShader->setImageBinding("diffuseTexture", m_diffuse.texture.get(), getContext().getSamplerManager()->DEFAULT_WRAPPING_SAMPLER);
+    pShader->setImageBinding("diffuseTexture", m_baseColorTexture.texture.get(), getContext().getSamplerManager()->DEFAULT_WRAPPING_SAMPLER);
   }
 
   if (bSpecMap) {
-    pShader->setImageBinding("specularTexture", m_specular.texture.get(), getContext().getSamplerManager()->DEFAULT_WRAPPING_SAMPLER);
+    pShader->setImageBinding("specularTexture", m_specularColorTexture.texture.get(), getContext().getSamplerManager()->DEFAULT_WRAPPING_SAMPLER);
   }
 
   if (bNormalMap) {
-    pShader->setImageBinding("normalTexture", m_normal.texture.get(), getContext().getSamplerManager()->DEFAULT_WRAPPING_SAMPLER);
+    pShader->setImageBinding("normalTexture", m_normalTexture.texture.get(), getContext().getSamplerManager()->DEFAULT_WRAPPING_SAMPLER);
   }
 
   if (bReflectionCubeMap) {
-    pShader->setImageBinding("reflectionCubeTexture", m_reflectionCube.get(), getContext().getSamplerManager()->DEFAULT_CLAMPED_SAMPLER);
+    // Deprecated by reflection cubes..
+    // pShader->setImageBinding("reflectionCubeTexture", m_reflectionCube.get(), getContext().getSamplerManager()->DEFAULT_CLAMPED_SAMPLER);
   }
 
   if (bReflectionMap) {
-    pShader->setImageBinding("reflectionTexture", m_reflection.texture.get(), getContext().getSamplerManager()->DEFAULT_CLAMPED_SAMPLER);
+    // Deprecated by PBR model..
+    // pShader->setImageBinding("reflectionTexture", m_reflection.texture.get(), getContext().getSamplerManager()->DEFAULT_CLAMPED_SAMPLER);
   }
 
   ri.reflectedObjects.push_back(this);
@@ -376,20 +425,14 @@ void KRMaterial::bind(KRNode::RenderInfo& ri, ModelFormat modelFormat, __uint32_
   ri.reflectedObjects.pop_back();
 }
 
-const std::string& KRMaterial::getName() const
-{
-  return m_name;
-}
-
-
 bool KRMaterial::getShaderValue(ShaderValue value, float* output) const
 {
   switch (value) {
   case ShaderValue::material_alpha:
-    *output = m_tr;
+    *output = m_baseColorFactor[3];
     return true;
   case ShaderValue::material_shininess:
-    *output = m_ns;
+    *output = 1.0f - m_roughnessFactor;
     return true;
   }
   return false;
@@ -399,28 +442,22 @@ bool KRMaterial::getShaderValue(ShaderValue value, hydra::Vector2* output) const
 {
   switch (value) {
   case ShaderValue::diffusetexture_scale:
-    *output = m_diffuse.scale;
+    *output = m_baseColorTexture.scale;
     return true;
   case ShaderValue::speculartexture_scale:
-    *output = m_specular.scale;
-    return true;
-  case ShaderValue::reflectiontexture_scale:
-    *output = m_reflection.scale;
+    *output = m_specularColorTexture.scale;
     return true;
   case ShaderValue::normaltexture_scale:
-    *output = m_normal.scale;
+    *output = m_normalTexture.scale;
     return true;
   case ShaderValue::diffusetexture_offset:
-    *output = m_diffuse.offset;
+    *output = m_baseColorTexture.offset;
     return true;
   case ShaderValue::speculartexture_offset:
-    *output = m_specular.offset;
-    return true;
-  case ShaderValue::reflectiontexture_offset:
-    *output = m_reflection.offset;
+    *output = m_specularColorTexture.offset;
     return true;
   case ShaderValue::normaltexture_offset:
-    *output = m_normal.offset;
+    *output = m_normalTexture.offset;
     return true;
   }
   return false;
@@ -429,17 +466,11 @@ bool KRMaterial::getShaderValue(ShaderValue value, hydra::Vector2* output) const
 bool KRMaterial::getShaderValue(ShaderValue value, hydra::Vector3* output) const
 {
   switch (value) {
-  case ShaderValue::material_reflection:
-    *output = m_reflectionColor;
-    return true;
-  case ShaderValue::material_ambient:
-    *output = m_ambientColor;
-    return true;
   case ShaderValue::material_diffuse:
-    *output = m_diffuseColor;
+    *output = hydra::Vector3::Create(m_baseColorFactor);
     return true;
   case ShaderValue::material_specular:
-    *output = m_specularColor;
+    *output = m_specularColorFactor;
     return true;
   }
   return false;

kraken/resources/material/KRMaterial.h

@@ -61,26 +61,31 @@ public:
   {
     KRMATERIAL_ALPHA_MODE_OPAQUE, // Non-transparent materials
     KRMATERIAL_ALPHA_MODE_TEST, // Alpha in diffuse texture is interpreted as punch-through when < 0.5
-    KRMATERIAL_ALPHA_MODE_BLENDONESIDE, // Blended alpha with backface culling
-    KRMATERIAL_ALPHA_MODE_BLENDTWOSIDE // Blended alpha rendered in two passes.  First pass renders backfaces; second pass renders frontfaces.
+    KRMATERIAL_ALPHA_MODE_BLEND // Blended alpha with backface culling
   } alpha_mode_type;
 
   struct TransformedTexture
   {
     KRTextureBinding texture;
-    int texCoord = 0; // uv texture index
-    hydra::Vector2 scale{};
-    hydra::Vector2 offset{};
-    float rotation = 0;
+    int texCoord{ 0 };
+    hydra::Vector2 scale{ 1.f, 1.f };
+    hydra::Vector2 offset{ 0.f, 0.f };
+    float rotation{ 0.f };
+
+    TransformedTexture(KRTexture::texture_usage_t usage)
+      : texture{ usage }
+    {
+    }
   };
 
   KRMaterial(KRContext& context, const char* szName);
+  KRMaterial(KRContext& context, std::string name, mimir::Block* data);
   virtual ~KRMaterial();
 
   virtual std::string getExtension();
   virtual bool save(mimir::Block& data);
 
-
+  /*
   void setAmbientMap(std::string texture_name, hydra::Vector2 texture_scale, hydra::Vector2 texture_offset);
   void setDiffuseMap(std::string texture_name, hydra::Vector2 texture_scale, hydra::Vector2 texture_offset);
   void setSpecularMap(std::string texture_name, hydra::Vector2 texture_scale, hydra::Vector2 texture_offset);
@@ -91,14 +96,15 @@ public:
   void setDiffuse(const hydra::Vector3& c);
   void setSpecular(const hydra::Vector3& c);
   void setReflection(const hydra::Vector3& c);
+  */
   void setTransparency(float a);
   void setShininess(float s);
   void setAlphaMode(alpha_mode_type blend_mode);
   alpha_mode_type getAlphaMode();
 
 
+
   bool isTransparent();
-  const std::string& getName() const;
   
   void bind(KRNode::RenderInfo& ri, ModelFormat modelFormat, __uint32_t vertexAttributes, CullMode cullMode, const std::vector<KRBone*>& bones, const std::vector<hydra::Matrix4>& bind_poses, const hydra::Matrix4& matModel, KRTexture* pLightMap, float lod_coverage = 0.0f);
 
@@ -108,29 +114,45 @@ public:
 
   virtual void getResourceBindings(std::list<KRResourceBinding*>& bindings) override;
 
-private:
-  std::string m_name;
-  TransformedTexture m_ambient;// mtl map_Ka value
-  TransformedTexture m_diffuse; // mtl map_Kd value
-  TransformedTexture m_specular; // mtl map_Ks value
-  TransformedTexture m_reflection; // mtl refl value
-  KRTextureBinding m_reflectionCube;
-  TransformedTexture m_normal; // mtl map_Normal value
+  // --- Serialized Material Attributes ---
+  TransformedTexture m_baseColorTexture{ KRTexture::TEXTURE_USAGE_MATERIAL_BASE_COLOR };
+  hydra::Vector4 m_baseColorFactor{ 1.f, 1.f, 1.f, 1.f };
+  TransformedTexture m_normalTexture{ KRTexture::TEXTURE_USAGE_MATERIAL_NORMAL };
+  float m_normalScale{ 1.f };
+  TransformedTexture m_emissiveTexture{ KRTexture::TEXTURE_USAGE_MATERIAL_EMISSIVE };
+  hydra::Vector3 m_emissiveFactor{ 0.f, 0.f, 0.f };
+  TransformedTexture m_occlusionTexture{ KRTexture::TEXTURE_USAGE_MATERIAL_OCCLUSION };
+  float m_occlusionStrength{ 1.f };
+  TransformedTexture m_metalicRoughness{ KRTexture::TEXTURE_USAGE_MATERIAL_METALIC_ROUGHNESS };
+  float m_metalicFactor{ 1.f };
+  float m_roughnessFactor{ 1.f };
+  alpha_mode_type m_alphaMode{ KRMATERIAL_ALPHA_MODE_OPAQUE };
+  float m_alphaCutoff{ 0.5f };
+  bool m_doubleSided{ false };
+  float m_ior{ 1.5f };
+  bool m_isUnlit{ false };
 
-  hydra::Vector3 m_ambientColor; // Ambient rgb
-  hydra::Vector3 m_diffuseColor; // Diffuse rgb
-  hydra::Vector3 m_specularColor; // Specular rgb
-  hydra::Vector3 m_reflectionColor; // Reflection rgb
+  TransformedTexture m_anisotropyTexture{ KRTexture::TEXTURE_USAGE_MATERIAL_ANISOTROPY };
+  float m_anisotropyStrength{ 0.f };
+  float m_anisotropyRotation{ 0.f };
 
-  //float m_ka_r, m_ka_g, m_ka_b; // Ambient rgb
-  //float m_kd_r, m_kd_g, m_kd_b; // Diffuse rgb
-  //float m_ks_r, m_ks_g, m_ks_b; // Specular rgb
-  //float m_kr_r, m_kr_g, m_kr_b; // Reflection rgb
+  TransformedTexture m_clearcoatTexture{ KRTexture::TEXTURE_USAGE_MATERIAL_CLEARCOAT };
+  float m_clearcoatFactor{ 0.f };
+  TransformedTexture m_clearcoatRoughnessTexture{ KRTexture::TEXTURE_USAGE_MATERIAL_CLEARCOAT_ROUGHNESS };
+  float m_clearcoatRoughnessFactor{ 0.f };
+  TransformedTexture m_clearcoatNormalTexture{ KRTexture::TEXTURE_USAGE_MATERIAL_CLEARCOAT_NORMAL };
 
-  float m_tr; // Transparency
-  float m_ns; // Shininess
+  float m_dispersion{ 0.f };
 
-  alpha_mode_type m_alpha_mode;
+  TransformedTexture m_specularTexture{ KRTexture::TEXTURE_USAGE_MATERIAL_SPECULAR };
+  float m_specularFactor{ 1.f };
+  TransformedTexture m_specularColorTexture{ KRTexture::TEXTURE_USAGE_MATERIAL_SPECULAR_COLOR };
+  hydra::Vector3 m_specularColorFactor{ 1.f, 1.f, 1.f };
+
+  TransformedTexture m_thicknessTexture{ KRTexture::TEXTURE_USAGE_MATERIAL_THICKNESS };
+  float m_thicknessFactor{ 0.f };
+  float m_attenuationDistance{ std::numeric_limits<float>::max() };
+  hydra::Vector3 m_attenuationColor{ 1.f, 1.f, 1.f };
 
 private:
   bool getShaderValue(ShaderValue value, float* output) const final;

kraken/resources/material/KRMaterialManager.cpp

@@ -49,17 +49,19 @@ KRMaterialManager::~KRMaterialManager()
 KRResource* KRMaterialManager::loadResource(const std::string& name, const std::string& extension, Block* data)
 {
   if (extension.compare("mtl") == 0) {
-    return load(name.c_str(), data);
+    return loadMtl(data);
+  } else if (extension.compare("krmaterial") == 0) {
+    KRMaterial* material = new KRMaterial(*m_pContext, name, data);
+    add(material);
+    return material;
   }
+
   return nullptr;
 }
 
 KRResource* KRMaterialManager::getResource(const std::string& name, const std::string& extension)
 {
-  if (extension.compare("mtl") == 0) {
-    // TODO - This is not correct -- there are multiple materials emitted in a single mtl file.
-    //        We should treat "mtl" files as source files, managed by KRSource, which output
-    //        material resources when compiled.
+  if (extension.compare("krmaterial") == 0) {
     return m_materials[name];
   }
   return nullptr;
@@ -97,7 +99,7 @@ void KRMaterialManager::add(KRMaterial* new_material)
   m_materials[lowerName] = new_material;
 }
 
-KRMaterial* KRMaterialManager::load(const char* szName, Block* data)
+KRMaterial* KRMaterialManager::loadMtl(Block* data)
 {
   KRMaterial* pMaterial = NULL;
   char szSymbol[16][256];
@@ -151,61 +153,65 @@ KRMaterial* KRMaterialManager::load(const char* szName, Block* data)
             if (cSymbols == 2) {
               if (strcmp(szSymbol[1], "test") == 0) {
                 pMaterial->setAlphaMode(KRMaterial::KRMATERIAL_ALPHA_MODE_TEST);
+                pMaterial->m_doubleSided = false;
               } else if (strcmp(szSymbol[1], "blendoneside") == 0) {
-                pMaterial->setAlphaMode(KRMaterial::KRMATERIAL_ALPHA_MODE_BLENDONESIDE);
+                pMaterial->setAlphaMode(KRMaterial::KRMATERIAL_ALPHA_MODE_BLEND);
+                pMaterial->m_doubleSided = false;
               } else if (strcmp(szSymbol[1], "blendtwoside") == 0) {
-                pMaterial->setAlphaMode(KRMaterial::KRMATERIAL_ALPHA_MODE_BLENDTWOSIDE);
+                pMaterial->setAlphaMode(KRMaterial::KRMATERIAL_ALPHA_MODE_BLEND);
+                pMaterial->m_doubleSided = true;
               } else {
                 pMaterial->setAlphaMode(KRMaterial::KRMATERIAL_ALPHA_MODE_OPAQUE);
+                pMaterial->m_doubleSided = false;
               }
             }
           } else if (strcmp(szSymbol[0], "ka") == 0) {
             char* pScan2 = szSymbol[1];
             float r = strtof(pScan2, &pScan2);
             if (cSymbols == 2) {
-              pMaterial->setAmbient(Vector3::Create(r, r, r));
+              // pMaterial->setAmbient(Vector3::Create(r, r, r)); // TODO - Map to modern material attributes. (Eg, detect unlit?)
             } else if (cSymbols == 4) {
               pScan2 = szSymbol[2];
               float g = strtof(pScan2, &pScan2);
               pScan2 = szSymbol[3];
               float b = strtof(pScan2, &pScan2);
-              pMaterial->setAmbient(Vector3::Create(r, g, b));
+              // pMaterial->setAmbient(Vector3::Create(r, g, b)); // TODO - Map to modern material attributes. (Eg, detect unlit?)
             }
           } else if (strcmp(szSymbol[0], "kd") == 0) {
             char* pScan2 = szSymbol[1];
             float r = strtof(pScan2, &pScan2);
             if (cSymbols == 2) {
-              pMaterial->setDiffuse(Vector3::Create(r, r, r));
+              pMaterial->m_baseColorFactor = Vector4::Create(r, r, r, 1.f);
             } else if (cSymbols == 4) {
               pScan2 = szSymbol[2];
               float g = strtof(pScan2, &pScan2);
               pScan2 = szSymbol[3];
               float b = strtof(pScan2, &pScan2);
-              pMaterial->setDiffuse(Vector3::Create(r, g, b));
+              pMaterial->m_baseColorFactor = Vector4::Create(r, g, b, 1.f);
             }
           } else if (strcmp(szSymbol[0], "ks") == 0) {
             char* pScan2 = szSymbol[1];
             float r = strtof(pScan2, &pScan2);
             if (cSymbols == 2) {
-              pMaterial->setSpecular(Vector3::Create(r, r, r));
+              pMaterial->m_specularColorFactor = Vector3::Create(r, r, r);
             } else if (cSymbols == 4) {
               pScan2 = szSymbol[2];
               float g = strtof(pScan2, &pScan2);
               pScan2 = szSymbol[3];
               float b = strtof(pScan2, &pScan2);
-              pMaterial->setSpecular(Vector3::Create(r, g, b));
+              pMaterial->m_specularColorFactor = Vector3::Create(r, g, b);
             }
           } else if (strcmp(szSymbol[0], "kr") == 0) {
             char* pScan2 = szSymbol[1];
             float r = strtof(pScan2, &pScan2);
             if (cSymbols == 2) {
-              pMaterial->setReflection(Vector3::Create(r, r, r));
+              pMaterial->m_roughnessFactor = 1.f - r;
             } else if (cSymbols == 4) {
               pScan2 = szSymbol[2];
               float g = strtof(pScan2, &pScan2);
               pScan2 = szSymbol[3];
               float b = strtof(pScan2, &pScan2);
-              pMaterial->setReflection(Vector3::Create(r, g, b));
+              // pMaterial->setReflection(Vector3::Create(r, g, b)); // TODO - Map to modern material attributes
             }
           } else if (strcmp(szSymbol[0], "tr") == 0) {
             char* pScan2 = szSymbol[1];
@@ -265,17 +271,23 @@ KRMaterial* KRMaterialManager::load(const char* szName, Block* data)
             }
 
             if (strcmp(szSymbol[0], "map_ka") == 0) {
-              pMaterial->setAmbientMap(szSymbol[1], texture_scale, texture_offset);
+              // pMaterial->setAmbientMap(szSymbol[1], texture_scale, texture_offset); // TODO - Map to modern material attributes. (Eg, unlit?)
             } else if (strcmp(szSymbol[0], "map_kd") == 0) {
-              pMaterial->setDiffuseMap(szSymbol[1], texture_scale, texture_offset);
+              pMaterial->m_baseColorTexture.texture.set(szSymbol[1]);
+              pMaterial->m_baseColorTexture.scale = texture_scale;
+              pMaterial->m_baseColorTexture.offset = texture_offset;
             } else if (strcmp(szSymbol[0], "map_ks") == 0) {
-              pMaterial->setSpecularMap(szSymbol[1], texture_scale, texture_offset);
+              pMaterial->m_specularColorTexture.texture.set(szSymbol[1]);
+              pMaterial->m_specularColorTexture.scale = texture_scale;
+              pMaterial->m_specularColorTexture.offset = texture_offset;
             } else if (strcmp(szSymbol[0], "map_normal") == 0) {
-              pMaterial->setNormalMap(szSymbol[1], texture_scale, texture_offset);
+              pMaterial->m_normalTexture.texture.set(szSymbol[1]);
+              pMaterial->m_normalTexture.scale = texture_scale;
+              pMaterial->m_normalTexture.offset = texture_offset;
             } else if (strcmp(szSymbol[0], "map_reflection") == 0) {
-              pMaterial->setReflectionMap(szSymbol[1], texture_scale, texture_offset);
+              // pMaterial->setReflectionMap(szSymbol[1], texture_scale, texture_offset); // TODO - Map to modern material attributes.
             } else if (strcmp(szSymbol[0], "map_reflectioncube") == 0) {
-              pMaterial->setReflectionCube(szSymbol[1]);
+              // pMaterial->setReflectionCube(szSymbol[1]); // TODO - Map to modern material attributes. Deprecated by reflection probes?
             }
           }
         }

kraken/resources/material/KRMaterialManager.h

@@ -52,7 +52,7 @@ public:
   virtual KRResource* loadResource(const std::string& name, const std::string& extension, mimir::Block* data) override;
   virtual KRResource* getResource(const std::string& name, const std::string& extension) override;
 
-  KRMaterial* load(const char* szName, mimir::Block* data);
+  KRMaterial* loadMtl(mimir::Block* data);
   void add(KRMaterial* new_material);
   KRMaterial* getMaterial(const std::string& name);
 

kraken/resources/mesh/KRMesh.cpp

@@ -270,16 +270,16 @@ void KRMesh::render(KRNode::RenderInfo& ri, const std::string& object_name, cons
                 pMaterial->bind(ri, getModelFormat(), getVertexAttributes(), CullMode::kCullBack, bones, bone_bind_poses, matModel, pLightMap, lod_coverage);
                 renderSubmesh(ri.commandBuffer, iSubmesh, ri.renderPass, object_name, pMaterial->getName(), lod_coverage);
                 break;
-              case KRMaterial::KRMATERIAL_ALPHA_MODE_BLENDONESIDE: // Blended alpha with backface culling
-                pMaterial->bind(ri, getModelFormat(), getVertexAttributes(), CullMode::kCullBack, bones, bone_bind_poses, matModel, pLightMap, lod_coverage);
-                renderSubmesh(ri.commandBuffer, iSubmesh, ri.renderPass, object_name, pMaterial->getName(), lod_coverage);
-                break;
-              case KRMaterial::KRMATERIAL_ALPHA_MODE_BLENDTWOSIDE: // Blended alpha rendered in two passes.  First pass renders backfaces; second pass renders frontfaces.
-                  // Render back faces first
-                pMaterial->bind(ri, getModelFormat(), getVertexAttributes(), CullMode::kCullFront, bones, bone_bind_poses, matModel, pLightMap, lod_coverage);
-                renderSubmesh(ri.commandBuffer, iSubmesh, ri.renderPass, object_name, pMaterial->getName(), lod_coverage);
+              case KRMaterial::KRMATERIAL_ALPHA_MODE_BLEND: // Blended Alpha
+                if (pMaterial->m_doubleSided) {
+                  // Blended alpha rendered in two passes.  First pass renders backfaces; second pass renders frontfaces.
+                  // 
+                  // Render back faces before front faces
+                  pMaterial->bind(ri, getModelFormat(), getVertexAttributes(), CullMode::kCullFront, bones, bone_bind_poses, matModel, pLightMap, lod_coverage);
+                  renderSubmesh(ri.commandBuffer, iSubmesh, ri.renderPass, object_name, pMaterial->getName(), lod_coverage);
+                }
 
-                // Render front faces second
+                // Render front faces
                 pMaterial->bind(ri, getModelFormat(), getVertexAttributes(), CullMode::kCullBack, bones, bone_bind_poses, matModel, pLightMap, lod_coverage);
                 renderSubmesh(ri.commandBuffer, iSubmesh, ri.renderPass, object_name, pMaterial->getName(), lod_coverage);
                 break;

kraken/resources/texture/KRTexture.cpp

@@ -189,7 +189,7 @@ float KRTexture::getStreamPriority()
     if (m_last_frame_usage & (TEXTURE_USAGE_SKY_CUBE | TEXTURE_USAGE_PARTICLE | TEXTURE_USAGE_SPRITE | TEXTURE_USAGE_LIGHT_FLARE)) {
       priority += 1000000.0f;
     }
-    if (m_last_frame_usage & (TEXTURE_USAGE_DIFFUSE_MAP | TEXTURE_USAGE_AMBIENT_MAP | TEXTURE_USAGE_SPECULAR_MAP | TEXTURE_USAGE_NORMAL_MAP | TEXTURE_USAGE_REFLECTION_MAP)) {
+    if (m_last_frame_usage & (TEXTURE_USAGE_MATERIAL)) {
       priority += 100000.0f;
     }
     if (m_last_frame_usage & (TEXTURE_USAGE_LIGHT_MAP)) {

kraken/resources/texture/KRTexture.h

@@ -64,16 +64,28 @@ public:
     TEXTURE_USAGE_UI = 0x01,
     TEXTURE_USAGE_SKY_CUBE = 0x02,
     TEXTURE_USAGE_LIGHT_MAP = 0x04,
-    TEXTURE_USAGE_DIFFUSE_MAP = 0x08,
-    TEXTURE_USAGE_AMBIENT_MAP = 0x10,
-    TEXTURE_USAGE_SPECULAR_MAP = 0x20,
-    TEXTURE_USAGE_NORMAL_MAP = 0x40,
-    TEXTURE_USAGE_REFLECTION_MAP = 0x80,
-    TEXTURE_USAGE_REFECTION_CUBE = 0x100,
-    TEXTURE_USAGE_LIGHT_FLARE = 0x200,
-    TEXTURE_USAGE_SHADOW_DEPTH = 0x400,
-    TEXTURE_USAGE_PARTICLE = 0x800,
-    TEXTURE_USAGE_SPRITE = 0x1000
+    TEXTURE_USAGE_REFECTION_CUBE = 0x08,
+    TEXTURE_USAGE_LIGHT_FLARE = 0x10,
+    TEXTURE_USAGE_SHADOW_DEPTH = 0x20,
+    TEXTURE_USAGE_PARTICLE = 0x40,
+    TEXTURE_USAGE_SPRITE = 0x80,
+
+    TEXTURE_USAGE_MATERIAL = 0x01000000,
+
+    TEXTURE_USAGE_MATERIAL_BASE_COLOR = TEXTURE_USAGE_MATERIAL | 0x00,
+    TEXTURE_USAGE_MATERIAL_NORMAL = TEXTURE_USAGE_MATERIAL | 0x01,
+    TEXTURE_USAGE_MATERIAL_EMISSIVE = TEXTURE_USAGE_MATERIAL | 0x02,
+    TEXTURE_USAGE_MATERIAL_OCCLUSION = TEXTURE_USAGE_MATERIAL | 0x04,
+    TEXTURE_USAGE_MATERIAL_METALIC_ROUGHNESS = TEXTURE_USAGE_MATERIAL | 0x08,
+    TEXTURE_USAGE_MATERIAL_ANISOTROPY = TEXTURE_USAGE_MATERIAL | 0x10,
+    TEXTURE_USAGE_MATERIAL_CLEARCOAT = TEXTURE_USAGE_MATERIAL | 0x20,
+    TEXTURE_USAGE_MATERIAL_CLEARCOAT_ROUGHNESS = TEXTURE_USAGE_MATERIAL | 0x40,
+    TEXTURE_USAGE_MATERIAL_CLEARCOAT_NORMAL = TEXTURE_USAGE_MATERIAL | 0x80,
+    TEXTURE_USAGE_MATERIAL_SPECULAR = TEXTURE_USAGE_MATERIAL | 0x100,
+    TEXTURE_USAGE_MATERIAL_SPECULAR_COLOR = TEXTURE_USAGE_MATERIAL | 0x200,
+    TEXTURE_USAGE_MATERIAL_THICKNESS = TEXTURE_USAGE_MATERIAL | 0x400,
+
+
   } texture_usage_t;
 
   float getStreamPriority();