[DirectX11] 096~98 Geometry Shader

Geometry Shader는 정점 셰이더(Vertex shader) 뒤와 픽셀 셰이더(Pixel shader) 앞에서 실행되는 셰이더 유형이다. 이것은 정점 셰이더 단독보다 더 복잡한 기하학적 조작을 가능하게 하며, 새로운 꼭짓점을 생성하거나 메쉬의 위상을 변경하거나 기하학에 다른 변환을 적용하는 데 사용한다.

Geometry Shader

Shaders
	Light.fx Billboard.fx
Framework
	Viewer
	Billboard.h .cpp
P
	BillboardDemo.h .cpp

렌더링 순서 DirectX9 vs. DirectX10

DirectX9

IA → VS → RS → PS → OM

DirectX10

IA → VS → GS →SO(요즘은 잘 안 쓴다) → RS → PS → OM

Light.fx 추가코드

Light.fx 추가코드

float4 PS_AllLight(MeshOutput input)
{
    NormalMapping(input.Uv, input.Normal, input.Tangent);
    
    Texture(Material.Diffuse, DiffuseMap, input.Uv);
    Texture(Material.Specular, SpecularMap, input.Uv);
    
    MaterialDesc output = MakeMaterial();
    MaterialDesc result = MakeMaterial();
    
    ComputeLight(output, input.Normal, input.wPosition);
    AddMaterial(result, output);
    
    ComputePointLight(output, input.Normal, input.wPosition);
    AddMaterial(result, output);
    
    ComputeSpotLight(output, input.Normal, input.wPosition);
    AddMaterial(result, output);
    
    return float4(MaterialToColor(result).rgb, 1.0f);
}

Billboard.fx

Billboard.fx

#include "00_Global.fx"
#include "00_Light.fx"
#include "00_Render.fx"

float4 PS(MeshOutput input) : SV_Target
{
    return PS_AllLight(input);
}


struct VertexBillboard
{
    float4 Position : Position;
    float2 Scale : Scale;
    uint MapIndex : MapIndex;
    //uint VertexIndex : SV_VertexID;
};

struct VertexOutput
{
    float4 Position : Position;
    float2 Scale : Scale;
    uint MapIndex : MapIndex;
};

VertexOutput VS(VertexBillboard input)
{
    VertexOutput output;
    
    output.Position = WorldPosition(input.Position);
    output.Scale = input.Scale;
    output.MapIndex = input.MapIndex;
    
    return output;
}

struct GeometryOutput
{
    float4 Position : SV_Position;
    float2 Uv : Uv;
    uint MapIndex : MapIndex;
};

[maxvertexcount(4)]
void GS_Billboard(point VertexOutput input[1], inout TriangleStream<GeometryOutput> stream)
{
    float3 up = float3(0, 1, 0);
    //float3 forward = float3(0, 0, 1);
    float3 forward = input[0].Position.xyz - ViewPosition();
    float3 right = normalize(cross(up, forward));//up과 forward를 외적한 후에 정규화해준다.
    
    float2 size = input[0].Scale * 0.5f; 
    
    
    float4 position[4];
    position[0] = float4(input[0].Position.xyz - size.x * right - size.y * up, 1);//좌하단
    position[1] = float4(input[0].Position.xyz - size.x * right + size.y * up, 1);//좌상단
    position[2] = float4(input[0].Position.xyz + size.x * right - size.y * up, 1);//우하단
    position[3] = float4(input[0].Position.xyz + size.x * right + size.y * up, 1);//우상단
    
    float2 uv[4] =
    {
        float2(0, 1), float2(0, 0), float2(1, 1), float2(1, 0)
    };
    
    
    GeometryOutput output; //자료형
    
    [unroll(4)] //정점 4개 처리
    for (int i = 0; i < 4; i++)
    {
        output.Position = ViewProjection(position[i]);
        output.Uv = uv[i];
        output.MapIndex = input[0].MapIndex;
        
        stream.Append(output);//TriangleStream을 추가한다.
    }
}

[maxvertexcount(8)]
void GS_Cross(point VertexOutput input[1], inout TriangleStream<GeometryOutput> stream)
{
    float3 up = float3(0, 1, 0);
    float3 forward = float3(0, 0, 1);
    float3 right = normalize(cross(up, forward));
    
    float2 size = input[0].Scale * 0.5f;
    
    
    float4 position[8];
    position[0] = float4(input[0].Position.xyz - size.x * right - size.y * up, 1);
    position[1] = float4(input[0].Position.xyz - size.x * right + size.y * up, 1);
    position[2] = float4(input[0].Position.xyz + size.x * right - size.y * up, 1);
    position[3] = float4(input[0].Position.xyz + size.x * right + size.y * up, 1);
    
    position[4] = float4(input[0].Position.xyz - size.x * forward - size.y * up, 1);
    position[5] = float4(input[0].Position.xyz - size.x * forward + size.y * up, 1);
    position[6] = float4(input[0].Position.xyz + size.x * forward - size.y * up, 1);
    position[7] = float4(input[0].Position.xyz + size.x * forward + size.y * up, 1);
    
    float2 uv[4] =
    {
        float2(0, 1), float2(0, 0), float2(1, 1), float2(1, 0)
    };
    
    
    GeometryOutput output;
    
    [unroll(8)]
    for (int i = 0; i < 8; i++)
    {
        output.Position = ViewProjection(position[i]);
        output.Uv = uv[i % 4];
        output.MapIndex = input[0].MapIndex;
        
        stream.Append(output);
        
        [flatten]
        if(i == 3)
            stream.RestartStrip();
    }
}


Texture2DArray BillboardMap;
float4 PS_Billboard(GeometryOutput input) : SV_Target
{
    return BillboardMap.Sample(LinearSampler, float3(input.Uv, input.MapIndex)) * 1.75f;
}

technique11 T0
{
    P_VP(P0, VS_Mesh, PS)
    P_VP(P1, VS_Model, PS)
    P_VP(P2, VS_Animation, PS)

    P_BS_VGP(P3, AlphaBlend, VS, GS_Billboard, PS_Billboard)
    P_RS_BS_VGP(P4, CullMode_None, AlphaBlend_AlphaToCoverageEnable, VS, GS_Cross, PS_Billboard)
}

void GS_Billboard(point VertexOutput input[1], inout TriangleStream<GeometryOutput> stream)

point VertexOutput input[1]
- point list이기 때문에 하나만 받아온다.
inout TriangleStream stream
- Geometry Shader는 삼각형만 다룬다.(사각형으로 사용이 불가능하다). 템플릿 문법을 사용하였다.

Billboard

Billboard.h

#pragma once
#define MAX_BILLBOARD_COUNT 10000

class Billboard : public Renderer
{
public:
	Billboard(Shader* shader);
	~Billboard();

	void Update();
	void Render();

	void Add(Vector3& position, Vector2& scale, UINT mapIndex);
	void AddTexture(wstring file);

private:
	struct VertexBillboard
	{
		Vector3 Position;
		Vector2 Scale;
		UINT MapIndex;
	};

private:
	vector<VertexBillboard> vertices;

	vector<wstring> textureNames;
	TextureArray* textureArray = NULL;
	ID3DX11EffectShaderResourceVariable* sDiffuseMap;
};

Billboard.cpp

#include "Framework.h"
#include "Billboard.h"

Billboard::Billboard(Shader* shader)
	: Renderer(shader)
{
	Topology(D3D11_PRIMITIVE_TOPOLOGY_POINTLIST);
	
	sDiffuseMap = shader->AsSRV("BillboardMap");
}

Billboard::~Billboard()
{
	SafeDelete(textureArray);
}

void Billboard::Update()
{
	Super::Update();
}

void Billboard::Render()
{
	if (textureNames.size() > 0 && textureArray == NULL)
	{
		SafeDelete(textureArray); //textureArray가 바뀌는 경우가 발생하므로 지우고

		textureArray = new TextureArray(textureNames);//textureArray를 그려준다.
	}

	if (vertexCount != vertices.size())
	{
		vertexCount = vertices.size();

		SafeDelete(vertexBuffer);
		vertexBuffer = new VertexBuffer(&vertices[0], vertices.size(), sizeof(VertexBillboard));
	}

	Super::Render();


	sDiffuseMap->SetResource(textureArray->SRV());
	shader->Draw(0, Pass(), vertexCount);
}

void Billboard::AddTexture(wstring file)
{
	textureNames.push_back(file);
}

void Billboard::Add(Vector3 & position, Vector2 & scale, UINT mapIndex)
{
	VertexBillboard vertex = 
	{
		position, scale, mapIndex
	};

	vertices.push_back(vertex);
}

BillboardDemo

BillboardDemo.h

#pragma once
#include "Systems/IExecute.h"

class BillboardDemo : public IExecute
{
public:
	virtual void Initialize() override;
	virtual void Ready() override {}
	virtual void Destroy() override {}
	virtual void Update() override;
	virtual void PreRender() override {}
	virtual void Render() override;
	virtual void PostRender() override {}
	virtual void ResizeScreen() override {}

private:
	void Billboards();
	void Mesh();
	void Airplane();
	void Kachujin();
	void KachujinCollider();
	void KachujinWeapon();
	void PointLighting();
	void SpotLighting();

	void Pass(UINT mesh, UINT model, UINT anim);

private:
	Shader* shader;

	Billboard* billboard;

	CubeSky* sky;

	Material* floor;
	Material* stone;
	Material* brick;
	Material* wall;

	MeshRender* cube;
	MeshRender* cylinder;
	MeshRender* sphere;
	MeshRender* grid;

	ModelRender* airplane = NULL;


	ModelAnimator* kachujin = NULL;
	Transform* colliderInitTransforms;
	ColliderObject** colliders;

	ModelRender* weapon = NULL;
	Transform* weaponInitTransform;

	vector<MeshRender *> meshes;
	vector<ModelRender *> models;
	vector<ModelAnimator *> animators;
};

BillboardDemo.cpp

#include "stdafx.h"
#include "BillboardDemo.h"

void BillboardDemo::Initialize()
{
	Context::Get()->GetCamera()->RotationDegree(20, 0, 0);
	Context::Get()->GetCamera()->Position(1, 36, -85);
	((Freedom *)Context::Get()->GetCamera())->Speed(50, 2);


	shader = new Shader(L"96_Billboard.fxo");

	sky = new CubeSky(L"Environment/GrassCube1024.dds");
	
	
	Billboards();

	Mesh();
	Airplane();
	
	Kachujin();
	KachujinCollider();
	KachujinWeapon();

	PointLighting();
	SpotLighting();
}

void BillboardDemo::Update()
{
	sky->Update();

	cube->Update();
	grid->Update();
	cylinder->Update();
	sphere->Update();

	airplane->Update();
	kachujin->Update();

	Matrix worlds[MAX_MODEL_TRANSFORMS];
	for (UINT i = 0; i < kachujin->GetTransformCount(); i++)
	{
		kachujin->GetAttachTransform(i, worlds);
		weapon->GetTransform(i)->World(weaponInitTransform->World() * worlds[40]);
	}

	weapon->UpdateTransforms();
	weapon->Update();

	billboard->Update();
}

void BillboardDemo::Render()
{
	sky->Render();

	
	Pass(0, 1, 2);

	wall->Render();
	sphere->Render();

	brick->Render();
	cylinder->Render();

	stone->Render();
	cube->Render();

	floor->Render();
	grid->Render();

	airplane->Render();
	
	kachujin->Render();
	weapon->Render();

	billboard->Render();
}

void BillboardDemo::Billboards()
{
	billboard = new Billboard(shader);
	//billboard->Pass(3);
	billboard->Pass(4);
	
	billboard->AddTexture(L"Terrain/grass_14.tga");
	billboard->AddTexture(L"Terrain/grass_07.tga");
	billboard->AddTexture(L"Terrain/grass_11.tga");

	for (UINT i = 0; i < 1200; i++)
	{
		Vector2 scale = Math::RandomVec2(1, 3);
		Vector2 position = Math::RandomVec2(-60, 60);

		billboard->Add(Vector3(position.x, scale.y * 0.5f, position.y), scale, 0);
	}

	for (UINT i = 0; i < 300; i++)
	{
		Vector2 scale = Math::RandomVec2(1, 3);
		Vector2 position = Math::RandomVec2(-60, 60);

		billboard->Add(Vector3(position.x, scale.y * 0.5f, position.y), scale, 1);
	}

	for (UINT i = 0; i < 700; i++)
	{
		Vector2 scale = Math::RandomVec2(1, 3);
		Vector2 position = Math::RandomVec2(-60, 60);

		billboard->Add(Vector3(position.x, scale.y * 0.5f, position.y), scale, 2);
	}
}

void BillboardDemo::Mesh()
{
	//Create Material
	{
		floor = new Material(shader);
		floor->DiffuseMap("Floor.png");
		floor->Specular(1, 1, 1, 20);
		floor->SpecularMap("Floor_Specular.png");
		floor->NormalMap("Floor_Normal.png");
		
		stone = new Material(shader);
		stone->DiffuseMap("Stones.png");
		stone->Specular(1, 1, 1, 20);
		stone->SpecularMap("Stones_Specular.png");
		stone->Emissive(0.15f, 0.15f, 0.15f, 0.3f);
		stone->NormalMap("Stones_Normal.png");

		
		brick = new Material(shader);
		brick->DiffuseMap("Bricks.png");
		brick->Specular(1, 0.3f, 0.3f, 20);
		brick->SpecularMap("Bricks_Specular.png");
		brick->Emissive(0.15f, 0.15f, 0.15f, 0.3f);
		brick->NormalMap("Bricks_Normal.png");

		wall = new Material(shader);
		wall->DiffuseMap("Wall.png");
		wall->Specular(1, 1, 1, 20);
		wall->SpecularMap("Wall_Specular.png");
		wall->Emissive(0.15f, 0.15f, 0.15f, 0.3f);
		wall->NormalMap("Wall_Normal.png");
	}

	//Create Mesh
	{
		Transform* transform = NULL;

		cube = new MeshRender(shader, new MeshCube());
		transform = cube->AddTransform();
		transform->Position(0, 5, 0);
		transform->Scale(20, 10, 20);

		grid = new MeshRender(shader, new MeshGrid(5, 5));
		transform = grid->AddTransform();
		transform->Position(0, 0, 0);
		transform->Scale(12, 1, 12);

		cylinder = new MeshRender(shader, new MeshCylinder(0.5f, 3.0f, 20, 20));
		sphere = new MeshRender(shader, new MeshSphere(0.5f, 20, 20));
		for (UINT i = 0; i < 5; i++)
		{
			transform = cylinder->AddTransform();
			transform->Position(-30, 6, -15.0f + (float)i * 15.0f);
			transform->Scale(5, 5, 5);

			transform = cylinder->AddTransform();
			transform->Position(30, 6, -15.0f + (float)i * 15.0f);
			transform->Scale(5, 5, 5);


			transform = sphere->AddTransform();
			transform->Position(-30, 15.5f, -15.0f + (float)i * 15.0f);
			transform->Scale(5, 5, 5);

			transform = sphere->AddTransform();
			transform->Position(30, 15.5f, -15.0f + (float)i * 15.0f);
			transform->Scale(5, 5, 5);
		}
	}

	sphere->UpdateTransforms();
	cylinder->UpdateTransforms();
	cube->UpdateTransforms();
	grid->UpdateTransforms();

	meshes.push_back(sphere);
	meshes.push_back(cylinder);
	meshes.push_back(cube);
	meshes.push_back(grid);
}

void BillboardDemo::Airplane()
{
	airplane = new ModelRender(shader);
	airplane->ReadMesh(L"B787/Airplane");
	airplane->ReadMaterial(L"B787/Airplane");

	Transform* transform = airplane->AddTransform();
	transform->Position(2.0f, 9.91f, 2.0f);
	transform->Scale(0.004f, 0.004f, 0.004f);
	airplane->UpdateTransforms();

	models.push_back(airplane);
}

void BillboardDemo::Kachujin()
{
	kachujin = new ModelAnimator(shader);
	kachujin->ReadMesh(L"Kachujin/Mesh");
	kachujin->ReadMaterial(L"Kachujin/Mesh");
	kachujin->ReadClip(L"Kachujin/Sword And Shield Idle");
	kachujin->ReadClip(L"Kachujin/Sword And Shield Walk");
	kachujin->ReadClip(L"Kachujin/Sword And Shield Run");
	kachujin->ReadClip(L"Kachujin/Sword And Shield Slash");
	kachujin->ReadClip(L"Kachujin/Salsa Dancing");


	Transform* transform = NULL;

	transform = kachujin->AddTransform();
	transform->Position(0, 0, -30);
	transform->Scale(0.075f, 0.075f, 0.075f);
	kachujin->PlayTweenMode(0, 0, 1.0f);

	transform = kachujin->AddTransform();
	transform->Position(-15, 0, -30);
	transform->Scale(0.075f, 0.075f, 0.075f);
	kachujin->PlayTweenMode(1, 1, 1.0f);

	transform = kachujin->AddTransform();
	transform->Position(-30, 0, -30);
	transform->Scale(0.075f, 0.075f, 0.075f);
	kachujin->PlayTweenMode(2, 2, 0.75f);

	transform = kachujin->AddTransform();
	transform->Position(15, 0, -30);
	transform->Scale(0.075f, 0.075f, 0.075f);
	kachujin->PlayBlendMode(3, 0, 1, 2);
	kachujin->SetBlendAlpha(3, 1.5f);

	transform = kachujin->AddTransform();
	transform->Position(30, 0, -32.5f);
	transform->Scale(0.075f, 0.075f, 0.075f);
	kachujin->PlayTweenMode(4, 4, 0.75f);

	kachujin->UpdateTransforms();

	animators.push_back(kachujin);
}

void BillboardDemo::KachujinCollider()
{
	UINT count = kachujin->GetTransformCount();
	colliders = new  ColliderObject*[count];

	colliderInitTransforms = new Transform();
	colliderInitTransforms->Position(-2.9f, 1.45f, -50.0f);
	colliderInitTransforms->Scale(5, 5, 75);

	for (UINT i = 0; i < count; i++)
	{
		colliders[i] = new ColliderObject();

		//colliders[i]->Init = new Transform();
		//colliders[i]->Init->Position(0, 0, 0);
		//colliders[i]->Init->Scale(10, 30, 10);

		colliders[i]->Transform = new Transform();
		//colliders[i]->Collider = new Collider(colliders[i]->Transform, colliders[i]->Init);
		colliders[i]->Collider = new Collider(colliders[i]->Transform, colliderInitTransforms);
	}
}

void BillboardDemo::KachujinWeapon()
{
	weapon = new ModelRender(shader);
	weapon->ReadMesh(L"Weapon/Sword");
	weapon->ReadMaterial(L"Weapon/Sword");

	UINT count = kachujin->GetTransformCount();
	for (UINT i = 0; i < count; i++)
		weapon->AddTransform();

	weapon->UpdateTransforms();
	models.push_back(weapon);

	
	weaponInitTransform = new Transform();
	weaponInitTransform->Position(-2.9f, 1.45f, -6.45f);
	weaponInitTransform->Scale(0.5f, 0.5f, 0.75f);
	weaponInitTransform->Rotation(0, 0, 1);
}

void BillboardDemo::PointLighting()
{
	PointLight light;
	light =
	{
		Color(0.0f, 0.0f, 0.0f, 1.0f), //Ambient
		Color(0.0f, 0.0f, 1.0f, 1.0f), //Diffuse
		Color(0.0f, 0.0f, 0.7f, 1.0f), //Specular
		Color(0.0f, 0.0f, 0.7f, 1.0f), //Emissive
		Vector3(-30, 10, -30), 5.0f, 0.9f
	};
	Lighting::Get()->AddPointLight(light);

	light =
	{
		Color(0.0f, 0.0f, 0.0f, 1.0f),
		Color(1.0f, 0.0f, 0.0f, 1.0f),
		Color(0.6f, 0.2f, 0.0f, 1.0f),
		Color(0.6f, 0.3f, 0.0f, 1.0f),
		Vector3(15, 10, -30), 10.0f, 0.3f
	};
	Lighting::Get()->AddPointLight(light);

	light =
	{
		Color(0.0f, 0.0f, 0.0f, 1.0f), //Ambient
		Color(0.0f, 1.0f, 0.0f, 1.0f), //Diffuse
		Color(0.0f, 0.7f, 0.0f, 1.0f), //Specular
		Color(0.0f, 0.7f, 0.0f, 1.0f), //Emissive
		Vector3(-5, 1, -17.5f), 5.0f, 0.9f
	};
	Lighting::Get()->AddPointLight(light);

	light =
	{
		Color(0.0f, 0.0f, 0.0f, 1.0f),
		Color(0.0f, 0.0f, 1.0f, 1.0f),
		Color(0.0f, 0.0f, 0.7f, 1.0f),
		Color(0.0f, 0.0f, 0.7f, 1.0f),
		Vector3(-10, 1, -17.5f), 5.0f, 0.9f
	};
	Lighting::Get()->AddPointLight(light);
}

void BillboardDemo::SpotLighting()
{
	SpotLight light;
	light =
	{
		Color(0.3f, 1.0f, 0.0f, 1.0f),
		Color(0.7f, 1.0f, 0.0f, 1.0f),
		Color(0.3f, 1.0f, 0.0f, 1.0f),
		Color(0.3f, 1.0f, 0.0f, 1.0f),
		Vector3(-15, 20, -30), 25.0f,
		Vector3(0, -1, 0), 30.0f, 0.4f
	};
	Lighting::Get()->AddSpotLight(light);

	light =
	{
		Color(1.0f, 0.2f, 0.9f, 1.0f),
		Color(1.0f, 0.2f, 0.9f, 1.0f),
		Color(1.0f, 0.2f, 0.9f, 1.0f),
		Color(1.0f, 0.2f, 0.9f, 1.0f),
		Vector3(0, 20, -30), 30.0f,
		Vector3(0, -1, 0), 40.0f, 0.55f
	};
	Lighting::Get()->AddSpotLight(light);
}

void BillboardDemo::Pass(UINT mesh, UINT model, UINT anim)
{
	for (MeshRender* temp : meshes)
		temp->Pass(mesh);

	for (ModelRender* temp : models)
		temp->Pass(model);

	for (ModelAnimator* temp : animators)
		temp->Pass(anim);
}

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[DirectX11] 096~98 Geometry Shader

Geometry Shader

렌더링 순서 DirectX9 vs. DirectX10

Light.fx 추가코드

Billboard.fx

Billboard

BillboardDemo

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Geometry Shader

렌더링 순서 DirectX9 vs. DirectX10

Light.fx 추가코드

Billboard.fx

Billboard

BillboardDemo

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[DirectX11] 103 MRT(Multiple Render Targets)

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