Graphics: Add Billboard support

include/Nazara/Graphics.hpp

@@ -32,6 +32,7 @@
 #include <Nazara/Graphics/AbstractViewer.hpp>
 #include <Nazara/Graphics/Algorithm.hpp>
 #include <Nazara/Graphics/BakedFrameGraph.hpp>
+#include <Nazara/Graphics/Billboard.hpp>
 #include <Nazara/Graphics/Camera.hpp>
 #include <Nazara/Graphics/Config.hpp>
 #include <Nazara/Graphics/DebugDrawPipelinePass.hpp>

include/Nazara/Graphics/Billboard.hpp

@@ -0,0 +1,66 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Graphics module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_GRAPHICS_BILLBOARD_HPP
+#define NAZARA_GRAPHICS_BILLBOARD_HPP
+
+#include <NazaraUtils/Prerequisites.hpp>
+#include <Nazara/Graphics/Config.hpp>
+#include <Nazara/Graphics/InstancedRenderable.hpp>
+#include <Nazara/Renderer/RenderPipeline.hpp>
+#include <Nazara/Utility/VertexDeclaration.hpp>
+#include <Nazara/Utility/VertexStruct.hpp>
+#include <array>
+
+namespace Nz
+{
+	class NAZARA_GRAPHICS_API Billboard : public InstancedRenderable
+	{
+		public:
+			Billboard(std::shared_ptr<MaterialInstance> material);
+			Billboard(std::shared_ptr<MaterialInstance> material, const Vector2f& size);
+			Billboard(const Billboard&) = delete;
+			Billboard(Billboard&&) noexcept = default;
+			~Billboard() = default;
+
+			void BuildElement(ElementRendererRegistry& registry, const ElementData& elementData, std::size_t passIndex, std::vector<RenderElementOwner>& elements) const override;
+
+			inline const Color& GetColor() const;
+			inline const Color& GetCornerColor(RectCorner corner) const;
+			const std::shared_ptr<MaterialInstance>& GetMaterial(std::size_t i = 0) const override;
+			std::size_t GetMaterialCount() const override;
+			inline RadianAnglef GetRotation() const;
+			inline const Vector2f& GetSize() const;
+			inline const Rectf& GetTextureCoords() const;
+			Vector3ui GetTextureSize() const;
+
+			inline void SetColor(const Color& color);
+			inline void SetCornerColor(RectCorner corner, const Color& color);
+			inline void SetMaterial(std::shared_ptr<MaterialInstance> material);
+			inline void SetRotation(RadianAnglef rotation);
+			inline void SetSize(const Vector2f& size);
+			inline void SetTextureCoords(const Rectf& textureCoords);
+			inline void SetTextureRect(const Rectf& textureRect);
+
+			Billboard& operator=(const Billboard&) = delete;
+			Billboard& operator=(Billboard&&) noexcept = default;
+
+		private:
+			inline void UpdateVertices();
+
+			std::array<VertexStruct_UV_SizeSinCos_Color, 4> m_vertices;
+			std::shared_ptr<MaterialInstance> m_material;
+			Color m_color;
+			EnumArray<RectCorner, Color> m_cornerColor;
+			RadianAnglef m_rotation;
+			Rectf m_textureCoords;
+			Vector2f m_size;
+	};
+}
+
+#include <Nazara/Graphics/Billboard.inl>
+
+#endif // NAZARA_GRAPHICS_BILLBOARD_HPP

include/Nazara/Graphics/Billboard.inl

@@ -0,0 +1,117 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Graphics module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <cassert>
+#include <Nazara/Graphics/Debug.hpp>
+
+namespace Nz
+{
+	inline const Color& Billboard::GetColor() const
+	{
+		return m_color;
+	}
+
+	inline const Color& Billboard::GetCornerColor(RectCorner corner) const
+	{
+		return m_cornerColor[corner];
+	}
+
+	inline RadianAnglef Billboard::GetRotation() const
+	{
+		return m_rotation;
+	}
+
+	inline const Rectf& Billboard::GetTextureCoords() const
+	{
+		return m_textureCoords;
+	}
+
+	inline const Vector2f& Billboard::GetSize() const
+	{
+		return m_size;
+	}
+
+	inline void Billboard::SetColor(const Color& color)
+	{
+		m_color = color;
+
+		UpdateVertices();
+	}
+
+	inline void Billboard::SetCornerColor(RectCorner corner, const Color& color)
+	{
+		m_cornerColor[corner] = color;
+
+		UpdateVertices();
+	}
+
+	inline void Billboard::SetMaterial(std::shared_ptr<MaterialInstance> material)
+	{
+		assert(material);
+
+		if (m_material != material)
+		{
+			OnMaterialInvalidated(this, 0, material);
+			m_material = std::move(material);
+
+			OnElementInvalidated(this);
+		}
+	}
+
+	inline void Billboard::SetRotation(RadianAnglef rotation)
+	{
+		m_rotation = rotation;
+
+		UpdateVertices();
+	}
+
+	inline void Billboard::SetSize(const Vector2f& size)
+	{
+		m_size = size;
+
+		UpdateVertices();
+	}
+
+	inline void Billboard::SetTextureCoords(const Rectf& textureCoords)
+	{
+		m_textureCoords = textureCoords;
+
+		UpdateVertices();
+	}
+
+	inline void Billboard::SetTextureRect(const Rectf& textureRect)
+	{
+		Vector2f invTextureSize = 1.f / Vector2f(Vector2ui(GetTextureSize()));
+		return SetTextureCoords(Rectf(textureRect.x * invTextureSize.x, textureRect.y * invTextureSize.y, textureRect.width * invTextureSize.x, textureRect.height * invTextureSize.y));
+	}
+
+	inline void Billboard::UpdateVertices()
+	{
+		VertexStruct_UV_SizeSinCos_Color* vertices = m_vertices.data();
+
+		EnumArray<RectCorner, Vector2f> cornerExtent;
+		cornerExtent[RectCorner::LeftBottom]  = Vector2f(0.f, 0.f);
+		cornerExtent[RectCorner::RightBottom] = Vector2f(1.f, 0.f);
+		cornerExtent[RectCorner::LeftTop]     = Vector2f(0.f, 1.f);
+		cornerExtent[RectCorner::RightTop]    = Vector2f(1.f, 1.f);
+
+		auto [sin, cos] = m_rotation.GetSinCos();
+
+		for (RectCorner corner : { RectCorner::LeftBottom, RectCorner::RightBottom, RectCorner::LeftTop, RectCorner::RightTop })
+		{
+			vertices->color = m_color * m_cornerColor[corner];
+			vertices->sizeSinCos = Vector4f(m_size.x, m_size.y, sin, cos);
+			vertices->uv = m_textureCoords.GetCorner(corner);
+
+			vertices++;
+		}
+
+		Vector2f halfSize = m_size * 0.5f;
+		float maxExtent = std::max(halfSize.x, halfSize.y);
+		UpdateAABB(Boxf(-maxExtent, -maxExtent, -maxExtent, maxExtent * 2.0f, maxExtent * 2.0f, maxExtent * 2.0f));
+		OnElementInvalidated(this);
+	}
+}
+
+#include <Nazara/Graphics/DebugOff.hpp>

include/Nazara/Utility/Enums.hpp

@@ -390,6 +390,7 @@ namespace Nz
 		JointWeights,
 		Normal,
 		Position,
+		SizeSinCos,
 		Tangent,
 		TexCoord,
 		Userdata,
@@ -406,6 +407,7 @@ namespace Nz
 	enum class VertexLayout
 	{
 		// Predefined declarations for rendering
+		UV_SizeSinCos,
 		XY,
 		XY_Color,
 		XY_UV,
@@ -416,6 +418,7 @@ namespace Nz
 		XYZ_Normal_UV,
 		XYZ_Normal_UV_Tangent,
 		XYZ_Normal_UV_Tangent_Skinning,
+		UV_SizeSinCos_Color,
 		XYZ_UV,
 
 		// Predefined declarations for instancing

include/Nazara/Utility/VertexStruct.hpp

@@ -68,6 +68,17 @@ namespace Nz
 		Vector3f tangent;
 	};
 
+	struct VertexStruct_UV_SizeSinCos
+	{
+		Vector2f uv;
+		Vector4f sizeSinCos; //< width, height, sin, cos
+	};
+
+	struct VertexStruct_UV_SizeSinCos_Color : VertexStruct_UV_SizeSinCos
+	{
+		Color color;
+	};
+
 	struct VertexStruct_XYZ_UV : VertexStruct_XYZ
 	{
 		Vector2f uv;

src/Nazara/Graphics/Billboard.cpp

@@ -0,0 +1,88 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Graphics module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Graphics/Billboard.hpp>
+#include <Nazara/Graphics/ElementRendererRegistry.hpp>
+#include <Nazara/Graphics/Graphics.hpp>
+#include <Nazara/Graphics/MaterialInstance.hpp>
+#include <Nazara/Graphics/RenderSpriteChain.hpp>
+#include <Nazara/Graphics/WorldInstance.hpp>
+#include <Nazara/Graphics/Debug.hpp>
+
+namespace Nz
+{
+	Billboard::Billboard(std::shared_ptr<MaterialInstance> material) :
+	m_material(std::move(material)),
+	m_color(Color::White()),
+	m_rotation(RadianAnglef::Zero()),
+	m_textureCoords(0.f, 0.f, 1.f, 1.f)
+	{
+		m_cornerColor.fill(Color::White());
+		m_size = Vector2f(Vector2ui(GetTextureSize()));
+
+		UpdateVertices();
+	}
+
+	Billboard::Billboard(std::shared_ptr<MaterialInstance> material, const Vector2f& size) :
+	m_material(std::move(material)),
+	m_color(Color::White()),
+	m_rotation(RadianAnglef::Zero()),
+	m_textureCoords(0.f, 0.f, 1.f, 1.f)
+	{
+		m_cornerColor.fill(Color::White());
+		m_size = size;
+
+		UpdateVertices();
+	}
+
+	void Billboard::BuildElement(ElementRendererRegistry& registry, const ElementData& elementData, std::size_t passIndex, std::vector<RenderElementOwner>& elements) const
+	{
+		const auto& materialPipeline = m_material->GetPipeline(passIndex);
+		if (!materialPipeline)
+			return;
+
+		MaterialPassFlags passFlags = m_material->GetPassFlags(passIndex);
+
+		const std::shared_ptr<VertexDeclaration>& vertexDeclaration = VertexDeclaration::Get(VertexLayout::UV_SizeSinCos_Color);
+
+		RenderPipelineInfo::VertexBufferData vertexBufferData = {
+			0,
+			vertexDeclaration
+		};
+		const auto& renderPipeline = materialPipeline->GetRenderPipeline(&vertexBufferData, 1);
+
+		const auto& whiteTexture = Graphics::Instance()->GetDefaultTextures().whiteTextures[ImageType::E2D];
+
+		elements.emplace_back(registry.AllocateElement<RenderSpriteChain>(GetRenderLayer(), m_material, passFlags, renderPipeline, *elementData.worldInstance, vertexDeclaration, whiteTexture, 1, m_vertices.data(), *elementData.scissorBox));
+	}
+
+	const std::shared_ptr<MaterialInstance>& Billboard::GetMaterial(std::size_t i) const
+	{
+		assert(i == 0);
+		NazaraUnused(i);
+
+		return m_material;
+	}
+
+	std::size_t Billboard::GetMaterialCount() const
+	{
+		return 1;
+	}
+
+	Vector3ui Billboard::GetTextureSize() const
+	{
+		assert(m_material);
+
+		//TODO: Cache index in registry?
+		if (const std::shared_ptr<Texture>* textureOpt = m_material->GetTextureProperty("BaseColorMap"))
+		{
+			// Material should always have textures but we're better safe than sorry
+			if (const std::shared_ptr<Texture>& texture = *textureOpt)
+				return texture->GetSize();
+		}
+
+		// Couldn't get material pass or texture
+		return Vector3ui::Unit(); //< prevents division by zero
+	}
+}

src/Nazara/Graphics/Material.cpp

@@ -146,6 +146,10 @@ namespace Nz
 								config.optionValues[CRC32("VertexPositionLoc")] = locationIndex;
 								break;
 
+							case VertexComponent::SizeSinCos:
+								config.optionValues[CRC32("VertexSizeRotLocation")] = locationIndex;
+								break;
+
 							case VertexComponent::Tangent:
 								config.optionValues[CRC32("VertexTangentLoc")] = locationIndex;
 								break;

src/Nazara/Graphics/PredefinedMaterials.cpp

@@ -15,12 +15,14 @@ namespace Nz
 	{
 		settings.AddValueProperty<Color>("BaseColor", Color::White());
 		settings.AddValueProperty<bool>("AlphaTest", false);
+		settings.AddValueProperty<bool>("Billboard", false);
 		settings.AddValueProperty<float>("AlphaTestThreshold", 0.2f);
 		settings.AddValueProperty<float>("ShadowMapNormalOffset", 0.f);
 		settings.AddValueProperty<float>("ShadowPosScale", 1.f - 0.0025f);
 		settings.AddTextureProperty("BaseColorMap", ImageType::E2D);
 		settings.AddTextureProperty("AlphaMap", ImageType::E2D);
 		settings.AddPropertyHandler(std::make_unique<OptionValuePropertyHandler>("AlphaTest", "AlphaTest"));
+		settings.AddPropertyHandler(std::make_unique<OptionValuePropertyHandler>("Billboard", "Billboard"));
 		settings.AddPropertyHandler(std::make_unique<TexturePropertyHandler>("BaseColorMap", "HasBaseColorTexture"));
 		settings.AddPropertyHandler(std::make_unique<TexturePropertyHandler>("AlphaMap", "HasAlphaTexture"));
 		settings.AddPropertyHandler(std::make_unique<UniformValuePropertyHandler>("BaseColor"));

src/Nazara/Graphics/Resources/Shaders/BasicMaterial.nzsl

@@ -18,14 +18,12 @@ option AlphaTest: bool = false;
 
 // Billboard related options
 option Billboard: bool = false;
-option BillboardCenterLocation: i32 = -1;
-option BillboardColorLocation: i32 = -1;
-option BillboardSizeRotLocation: i32 = -1;
 
 // Vertex declaration related options
 option VertexColorLoc: i32 = -1;
 option VertexNormalLoc: i32 = -1;
-option VertexPositionLoc: i32;
+option VertexPositionLoc: i32 = -1;
+option VertexSizeRotLocation: i32 = -1;
 option VertexUvLoc: i32 = -1;
 
 option VertexJointIndicesLoc: i32 = -1;
@@ -34,7 +32,8 @@ option VertexJointWeightsLoc: i32 = -1;
 const HasNormal = (VertexNormalLoc >= 0);
 const HasVertexColor = (VertexColorLoc >= 0);
 const HasColor = (HasVertexColor || Billboard);
-const HasUV = (VertexUvLoc >= 0);
+const HasVertexUV = (VertexUvLoc >= 0);
+const HasUV = (HasVertexUV);
 const HasSkinning = (VertexJointIndicesLoc >= 0 && VertexJointWeightsLoc >= 0);
 
 [layout(std140)]
@@ -152,6 +151,7 @@ fn FragDepth(input: VertOut) -> FragOut
 fn FragDepthNoAlpha() {} //< dummy
 
 // Vertex stage
+[cond(!Billboard)]
 struct VertIn
 {
 	[location(VertexPositionLoc)] 
@@ -163,55 +163,68 @@ struct VertIn
 	[cond(HasNormal), location(VertexNormalLoc)]
 	normal: vec3[f32],
 
-	[cond(HasUV), location(VertexUvLoc)] 
+	[cond(HasVertexUV), location(VertexUvLoc)] 
 	uv: vec2[f32],
 
 	[cond(HasSkinning), location(VertexJointIndicesLoc)]
 	jointIndices: vec4[i32],
 
 	[cond(HasSkinning), location(VertexJointWeightsLoc)]
-	jointWeights: vec4[f32],
+	jointWeights: vec4[f32]
-
-	[cond(Billboard), location(BillboardCenterLocation)]
-	billboardCenter: vec3[f32],
-
-	[cond(Billboard), location(BillboardSizeRotLocation)]
-	billboardSizeRot: vec4[f32], //< width,height,sin,cos
-
-	[cond(Billboard), location(BillboardColorLocation)]
-	billboardColor: vec4[f32]
 }
 
-[entry(vert), cond(Billboard)]
+[cond(Billboard)]
-fn VertBillboard(input: VertIn) -> VertOut
+struct BillboardVertIn
 {
-	let size = input.billboardSizeRot.xy;
+	[builtin(vertex_index)] vertIndex: i32,
-	let sinCos = input.billboardSizeRot.zw;
+
+	[location(VertexSizeRotLocation)]
+	sizeRot: vec4[f32], //< width,height,sin,cos
+
+	[cond(HasVertexUV), location(VertexUvLoc)] 
+	uv: vec2[f32],
+
+	[cond(HasVertexColor), location(VertexColorLoc)]
+	color: vec4[f32]
+}
+
+const billboardPos = array[vec2[f32]](
+	vec2[f32](-0.5, -0.5),
+	vec2[f32]( 0.5, -0.5),
+	vec2[f32](-0.5, 0.5),
+	vec2[f32]( 0.5, 0.5)
+);
+
+[entry(vert), cond(Billboard)]
+fn VertBillboard(input: BillboardVertIn) -> VertOut
+{
+	let position = billboardPos[input.vertIndex % 4];
+
+	let size = input.sizeRot.xy;
+	let sinCos = input.sizeRot.zw;
 
 	let rotatedPosition = vec2[f32](
-		input.pos.x * sinCos.y - input.pos.y * sinCos.x,
+		position.x * sinCos.y - position.y * sinCos.x,
-		input.pos.y * sinCos.y + input.pos.x * sinCos.x
+		position.y * sinCos.y + position.x * sinCos.x
 	);
 	rotatedPosition *= size;
 
 	let cameraRight = vec3[f32](viewerData.viewMatrix[0][0], viewerData.viewMatrix[1][0], viewerData.viewMatrix[2][0]);
 	let cameraUp = vec3[f32](viewerData.viewMatrix[0][1], viewerData.viewMatrix[1][1], viewerData.viewMatrix[2][1]);
 
-	let vertexPos = input.billboardCenter;
+	let worldPosition = vec3[f32](instanceData.worldMatrix[3].xyz);
-	vertexPos += cameraRight * rotatedPosition.x;
+	worldPosition += cameraRight * rotatedPosition.x;
-	vertexPos += cameraUp * rotatedPosition.y;
+	worldPosition += cameraUp * rotatedPosition.y;
-
-	let worldPosition = instanceData.worldMatrix * vec4[f32](vertexPos, 1.0);
 
 	let output: VertOut;
-	output.worldPos = worldPosition.xyz;
+	output.worldPos = worldPosition;
-	output.position = viewerData.viewProjMatrix * worldPosition;
+	output.position = viewerData.viewProjMatrix * vec4[f32](worldPosition, 1.0);
+
+	const if (HasVertexUV)
+		output.uv = input.uv;
 
 	const if (HasColor)
-		output.color = input.billboardColor;
+		output.color = input.color;
-	
-	const if (HasUV)
-		output.uv = input.pos.xy + vec2[f32](0.5, 0.5);
 
 	return output;
 }
@@ -252,7 +265,7 @@ fn VertMain(input: VertIn) -> VertOut
 	const if (HasColor)
 		output.color = input.color;
 
-	const if (HasUV)
+	const if (HasVertexUV)
 		output.uv = input.uv;
 
 	return output;

src/Nazara/Graphics/Resources/Shaders/PhongMaterial.nzsl

@@ -27,14 +27,12 @@ option HasSpecularTexture: bool = false;
 
 // Billboard related options
 option Billboard: bool = false;
-option BillboardCenterLocation: i32 = -1;
-option BillboardColorLocation: i32 = -1;
-option BillboardSizeRotLocation: i32 = -1;
 
 // Vertex declaration related options
 option VertexColorLoc: i32 = -1;
 option VertexNormalLoc: i32 = -1;
-option VertexPositionLoc: i32;
+option VertexPositionLoc: i32 = -1;
+option VertexSizeRotLocation: i32 = -1;
 option VertexTangentLoc: i32 = -1;
 option VertexUvLoc: i32 = -1;
 
@@ -47,7 +45,8 @@ const HasNormal = (VertexNormalLoc >= 0);
 const HasVertexColor = (VertexColorLoc >= 0);
 const HasColor = (HasVertexColor || Billboard);
 const HasTangent = (VertexTangentLoc >= 0);
-const HasUV = (VertexUvLoc >= 0);
+const HasVertexUV = (VertexUvLoc >= 0);
+const HasUV = (HasVertexUV);
 const HasNormalMapping = HasNormalTexture && HasNormal && HasTangent && !DepthPass;
 const HasSkinning = (VertexJointIndicesLoc >= 0 && VertexJointWeightsLoc >= 0);
 const HasLighting = HasNormal && !DepthPass;
@@ -295,6 +294,7 @@ fn FragDepth(input: VertOut) -> FragOut
 fn FragDepthNoAlpha() {} //< dummy
 
 // Vertex stage
+[cond(!Billboard)]
 struct VertIn
 {
 	[location(VertexPositionLoc)] 
@@ -303,7 +303,7 @@ struct VertIn
 	[cond(HasVertexColor), location(VertexColorLoc)] 
 	color: vec4[f32],
 
-	[cond(HasUV), location(VertexUvLoc)] 
+	[cond(HasVertexUV), location(VertexUvLoc)] 
 	uv: vec2[f32],
 
 	[cond(HasNormal), location(VertexNormalLoc)]
@@ -316,45 +316,61 @@ struct VertIn
 	jointIndices: vec4[i32],
 
 	[cond(HasSkinning), location(VertexJointWeightsLoc)]
-	jointWeights: vec4[f32],
+	jointWeights: vec4[f32]
-
-	[cond(Billboard), location(BillboardCenterLocation)]
-	billboardCenter: vec3[f32],
-
-	[cond(Billboard), location(BillboardSizeRotLocation)]
-	billboardSizeRot: vec4[f32], //< width,height,sin,cos
-
-	[cond(Billboard), location(BillboardColorLocation)]
-	billboardColor: vec4[f32]
 }
 
-[entry(vert), cond(Billboard)]
+[cond(Billboard)]
-fn billboardMain(input: VertIn) -> VertOut
+struct BillboardVertIn
 {
-	let size = input.billboardSizeRot.xy;
+	[builtin(vertex_index)] vertIndex: i32,
-	let sinCos = input.billboardSizeRot.zw;
+
+	[location(VertexSizeRotLocation)]
+	sizeRot: vec4[f32], //< width,height,sin,cos
+
+	[cond(HasVertexUV), location(VertexUvLoc)] 
+	uv: vec2[f32],
+
+	[cond(HasVertexColor), location(VertexColorLoc)]
+	color: vec4[f32]
+}
+
+const billboardPos = array[vec2[f32]](
+	vec2[f32](-0.5, -0.5),
+	vec2[f32]( 0.5, -0.5),
+	vec2[f32](-0.5, 0.5),
+	vec2[f32]( 0.5, 0.5)
+);
+
+[entry(vert), cond(Billboard)]
+fn VertBillboard(input: BillboardVertIn) -> VertOut
+{
+	let position = billboardPos[input.vertIndex % 4];
+
+	let size = input.sizeRot.xy;
+	let sinCos = input.sizeRot.zw;
 
 	let rotatedPosition = vec2[f32](
-		input.pos.x * sinCos.y - input.pos.y * sinCos.x,
+		position.x * sinCos.y - position.y * sinCos.x,
-		input.pos.y * sinCos.y + input.pos.x * sinCos.x
+		position.y * sinCos.y + position.x * sinCos.x
 	);
 	rotatedPosition *= size;
 
 	let cameraRight = vec3[f32](viewerData.viewMatrix[0][0], viewerData.viewMatrix[1][0], viewerData.viewMatrix[2][0]);
 	let cameraUp = vec3[f32](viewerData.viewMatrix[0][1], viewerData.viewMatrix[1][1], viewerData.viewMatrix[2][1]);
 
-	let vertexPos = input.billboardCenter;
+	let worldPosition = vec3[f32](instanceData.worldMatrix[3].xyz);
-	vertexPos += cameraRight * rotatedPosition.x;
+	worldPosition += cameraRight * rotatedPosition.x;
-	vertexPos += cameraUp * rotatedPosition.y;
+	worldPosition += cameraUp * rotatedPosition.y;
 
 	let output: VertOut;
-	output.position = viewerData.viewProjMatrix * instanceData.worldMatrix * vec4[f32](vertexPos, 1.0);
+	output.worldPos = worldPosition;
+	output.position = viewerData.viewProjMatrix * vec4[f32](worldPosition, 1.0);
+
+	const if (HasVertexUV)
+		output.uv = input.uv;
 
 	const if (HasColor)
-		output.color = input.billboardColor;
+		output.color = input.color;
-	
-	const if (HasUV)
-		output.uv = input.pos.xy + vec2[f32](0.5, 0.5);
 
 	return output;
 }
@@ -414,7 +430,7 @@ fn main(input: VertIn) -> VertOut
 	const if (HasNormal)
 		output.normal = rotationMatrix * normal;
 
-	const if (HasUV)
+	const if (HasVertexUV)
 		output.uv = input.uv;
 
 	const if (HasNormalMapping)

src/Nazara/Graphics/Resources/Shaders/PhysicallyBasedMaterial.nzsl

@@ -29,14 +29,12 @@ option HasSpecularTexture: bool = false;
 
 // Billboard related options
 option Billboard: bool = false;
-option BillboardCenterLocation: i32 = -1;
-option BillboardColorLocation: i32 = -1;
-option BillboardSizeRotLocation: i32 = -1;
 
 // Vertex declaration related options
 option VertexColorLoc: i32 = -1;
 option VertexNormalLoc: i32 = -1;
-option VertexPositionLoc: i32;
+option VertexPositionLoc: i32 = -1;
+option VertexSizeRotLocation: i32 = -1;
 option VertexTangentLoc: i32 = -1;
 option VertexUvLoc: i32 = -1;
 
@@ -49,7 +47,8 @@ const HasNormal = (VertexNormalLoc >= 0);
 const HasVertexColor = (VertexColorLoc >= 0);
 const HasColor = (HasVertexColor || Billboard);
 const HasTangent = (VertexTangentLoc >= 0);
-const HasUV = (VertexUvLoc >= 0);
+const HasVertexUV = (VertexUvLoc >= 0);
+const HasUV = (HasVertexUV);
 const HasNormalMapping = HasNormalTexture && HasNormal && HasTangent && !DepthPass;
 const HasSkinning = (VertexJointIndicesLoc >= 0 && VertexJointWeightsLoc >= 0);
 
@@ -292,6 +291,7 @@ fn FragDepth(input: VertOut) -> FragOut
 fn FragDepthNoAlpha() {} //< dummy
 
 // Vertex stage
+[cond(!Billboard)]
 struct VertIn
 {
 	[location(VertexPositionLoc)] 
@@ -300,7 +300,7 @@ struct VertIn
 	[cond(HasVertexColor), location(VertexColorLoc)] 
 	color: vec4[f32],
 
-	[cond(HasUV), location(VertexUvLoc)] 
+	[cond(HasVertexUV), location(VertexUvLoc)] 
 	uv: vec2[f32],
 
 	[cond(HasNormal), location(VertexNormalLoc)]
@@ -313,45 +313,61 @@ struct VertIn
 	jointIndices: vec4[i32],
 
 	[cond(HasSkinning), location(VertexJointWeightsLoc)]
-	jointWeights: vec4[f32],
+	jointWeights: vec4[f32]
-
-	[cond(Billboard), location(BillboardCenterLocation)]
-	billboardCenter: vec3[f32],
-
-	[cond(Billboard), location(BillboardSizeRotLocation)]
-	billboardSizeRot: vec4[f32], //< width,height,sin,cos
-
-	[cond(Billboard), location(BillboardColorLocation)]
-	billboardColor: vec4[f32]
 }
 
-[entry(vert), cond(Billboard)]
+[cond(Billboard)]
-fn VertBillboard(input: VertIn) -> VertOut
+struct BillboardVertIn
 {
-	let size = input.billboardSizeRot.xy;
+	[builtin(vertex_index)] vertIndex: i32,
-	let sinCos = input.billboardSizeRot.zw;
+
+	[location(VertexSizeRotLocation)]
+	sizeRot: vec4[f32], //< width,height,sin,cos
+
+	[cond(HasVertexUV), location(VertexUvLoc)] 
+	uv: vec2[f32],
+
+	[cond(HasVertexColor), location(VertexColorLoc)]
+	color: vec4[f32]
+}
+
+const billboardPos = array[vec2[f32]](
+	vec2[f32](-0.5, -0.5),
+	vec2[f32]( 0.5, -0.5),
+	vec2[f32](-0.5, 0.5),
+	vec2[f32]( 0.5, 0.5)
+);
+
+[entry(vert), cond(Billboard)]
+fn VertBillboard(input: BillboardVertIn) -> VertOut
+{
+	let position = billboardPos[input.vertIndex % 4];
+
+	let size = input.sizeRot.xy;
+	let sinCos = input.sizeRot.zw;
 
 	let rotatedPosition = vec2[f32](
-		input.pos.x * sinCos.y - input.pos.y * sinCos.x,
+		position.x * sinCos.y - position.y * sinCos.x,
-		input.pos.y * sinCos.y + input.pos.x * sinCos.x
+		position.y * sinCos.y + position.x * sinCos.x
 	);
 	rotatedPosition *= size;
 
 	let cameraRight = vec3[f32](viewerData.viewMatrix[0][0], viewerData.viewMatrix[1][0], viewerData.viewMatrix[2][0]);
 	let cameraUp = vec3[f32](viewerData.viewMatrix[0][1], viewerData.viewMatrix[1][1], viewerData.viewMatrix[2][1]);
 
-	let vertexPos = input.billboardCenter;
+	let worldPosition = vec3[f32](instanceData.worldMatrix[3].xyz);
-	vertexPos += cameraRight * rotatedPosition.x;
+	worldPosition += cameraRight * rotatedPosition.x;
-	vertexPos += cameraUp * rotatedPosition.y;
+	worldPosition += cameraUp * rotatedPosition.y;
 
 	let output: VertOut;
-	output.position = viewerData.viewProjMatrix * instanceData.worldMatrix * vec4[f32](vertexPos, 1.0);
+	output.worldPos = worldPosition;
+	output.position = viewerData.viewProjMatrix * vec4[f32](worldPosition, 1.0);
+
+	const if (HasVertexUV)
+		output.uv = input.uv;
 
 	const if (HasColor)
-		output.color = input.billboardColor;
+		output.color = input.color;
-
-	const if (HasUV)
-		output.uv = input.pos.xy + vec2[f32](0.5, 0.5);
 
 	return output;
 }
@@ -411,7 +427,7 @@ fn VertMain(input: VertIn) -> VertOut
 	const if (HasNormal)
 		output.normal = rotationMatrix * input.normal;
 
-	const if (HasUV)
+	const if (HasVertexUV)
 		output.uv = input.uv;
 
 	const if (HasNormalMapping)

src/Nazara/Utility/VertexDeclaration.cpp

@@ -293,6 +293,43 @@ namespace Nz
 
 			NazaraAssert(s_declarations[VertexLayout::XYZ_Normal_UV_Tangent_Skinning]->GetStride() == sizeof(VertexStruct_XYZ_Normal_UV_Tangent_Skinning), "Invalid stride for declaration VertexLayout::XYZ_Normal_UV_Tangent_Skinning");
 			
+			// VertexLayout::XYZ_SizeRot : VertexStruct_XYZ_SizeRot
+			s_declarations[VertexLayout::UV_SizeSinCos] = NewDeclaration(VertexInputRate::Vertex, {
+				{
+					VertexComponent::TexCoord,
+					ComponentType::Float2,
+					0
+				},
+				{
+					VertexComponent::SizeSinCos,
+					ComponentType::Float4,
+					0
+				}
+			});
+
+			NazaraAssert(s_declarations[VertexLayout::UV_SizeSinCos]->GetStride() == sizeof(VertexStruct_UV_SizeSinCos), "Invalid stride for declaration VertexLayout::UV_SizeSinCos");
+
+			// VertexLayout::XYZ_SizeRot_Color : VertexStruct_XYZ_SizeRot_Color
+			s_declarations[VertexLayout::UV_SizeSinCos_Color] = NewDeclaration(VertexInputRate::Vertex, {
+				{
+					VertexComponent::TexCoord,
+					ComponentType::Float2,
+					0
+				},
+				{
+					VertexComponent::SizeSinCos,
+					ComponentType::Float4,
+					0
+				},
+				{
+					VertexComponent::Color,
+					ComponentType::Color,
+					0
+				}
+			});
+
+			NazaraAssert(s_declarations[VertexLayout::UV_SizeSinCos_Color]->GetStride() == sizeof(VertexStruct_UV_SizeSinCos_Color), "Invalid stride for declaration VertexLayout::UV_SizeSinCos_Color");
+
 			// VertexLayout::XYZ_UV : VertexStruct_XYZ_UV
 			s_declarations[VertexLayout::XYZ_UV] = NewDeclaration(VertexInputRate::Vertex, {
 				{