[DirectX11] 011 Index

 

 

목차

 

 

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Index

 

 

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Index를 활용한 사각형 그리기

 

• 0 1 2    2 1 3 순서로 그린다.

 

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IndexDemo 코드

 

10_World.fx 코드는 이전글과 동일

 

IndexDemo.h

#pragma once
#include "Systems/IExecute.h"
 
class IndexDemo : 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:
	Shader* shader;
 
	Vertex vertices[4];
	ID3D11Buffer* vertexBuffer;
	
	UINT indices[6];
	ID3D11Buffer* indexBuffer;
 
	Matrix world;
};

 

 

IndexDemo.cpp

#include "stdafx.h"
#include "IndexDemo.h"
 
void IndexDemo::Initialize()
{
	shader = new Shader(L"10_World.fx");
	
	vertices[0].Position = Vector3(-0.5f, -0.5f, 0.0f);
	vertices[1].Position = Vector3(-0.5f, +0.5f, 0.0f);
	vertices[2].Position = Vector3(+0.5f, -0.5f, 0.0f);
	vertices[3].Position = Vector3(+0.5f, +0.5f, 0.0f);
 
	//Create Vertex Buffer
	{
		D3D11_BUFFER_DESC desc;
		ZeroMemory(&desc, sizeof(D3D11_BUFFER_DESC));
		desc.ByteWidth = sizeof(Vertex) * 4;
		desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
 
		D3D11_SUBRESOURCE_DATA subResource = { 0 };
		subResource.pSysMem = vertices;
 
		Check(D3D::GetDevice()->CreateBuffer(&desc, &subResource, &vertexBuffer));
	}
 
	indices[0] = 0;
	indices[1] = 1;
	indices[2] = 2;
 
	indices[3] = 2;
	indices[4] = 1;
	indices[5] = 3;
 
	//Create Index Buffer
	{
		D3D11_BUFFER_DESC desc;
		ZeroMemory(&desc, sizeof(D3D11_BUFFER_DESC));
		desc.ByteWidth = sizeof(UINT) * 6;
		desc.BindFlags = D3D11_BIND_INDEX_BUFFER;
 
		D3D11_SUBRESOURCE_DATA subResource = { 0 };
		subResource.pSysMem = indices;
 
		Check(D3D::GetDevice()->CreateBuffer(&desc, &subResource, &indexBuffer));
	}
 
	D3DXMatrixIdentity(&world);
}
 
void IndexDemo::Destroy()
{
	SafeDelete(shader);
 
	SafeDelete(vertexBuffer);
	SafeDelete(indexBuffer);
}
 
void IndexDemo::Update()
{
}
 
void IndexDemo::Render()
{
	shader->AsScalar("Index")->SetInt(0);
	shader->AsMatrix("World")->SetMatrix(world);
	shader->AsMatrix("View")->SetMatrix(Context::Get()->View());
	shader->AsMatrix("Projection")->SetMatrix(Context::Get()->Projection());
 
	UINT stride = sizeof(Vertex);
	UINT offset = 0;
 
	D3D::GetDC()->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
	D3D::GetDC()->IASetVertexBuffers(0, 1, &vertexBuffer, &stride, &offset);
	D3D::GetDC()->IASetIndexBuffer(indexBuffer, DXGI_FORMAT_R32_UINT, 0);
	
	shader->DrawIndexed(0, 1, 6);
 
}

 

 

Main.cpp

#include "stdafx.h"
#include "Main.h"
#include "Systems/Window.h"
 
#include "IndexDemo.h"
 
void Main::Initialize()
{
	Push(new IndexDemo());
}
 
void Main::Ready()
{
 
}
 
void Main::Destroy()
{
	for (IExecute* exe : executes)
	{
		exe->Destroy();
		SafeDelete(exe);
	}
}
 
void Main::Update()
{
	for (IExecute* exe : executes)
		exe->Update();
}
 
void Main::PreRender()
{
	for (IExecute* exe : executes)
		exe->PreRender();
}
 
void Main::Render()
{
	for (IExecute* exe : executes)
		exe->Render();
}
 
void Main::PostRender()
{
	for (IExecute* exe : executes)
		exe->PostRender();
}
 
void Main::ResizeScreen()
{
	for (IExecute* exe : executes)
		exe->ResizeScreen();
}
 
void Main::Push(IExecute * execute)
{
	executes.push_back(execute);
 
	execute->Initialize();
}
 
int WINAPI WinMain(HINSTANCE instance, HINSTANCE prevInstance, LPSTR param, int command)
{
	D3DDesc desc;
	desc.AppName = L"D3D Game";
	desc.Instance = instance;
	desc.bFullScreen = false;
	desc.bVsync = false;
	desc.Handle = NULL;
	desc.Width = 1280;
	desc.Height = 720;
	desc.Background = Color(0.3f, 0.3f, 0.3f, 1.0f);
	D3D::SetDesc(desc);
 
	Main* main = new Main();
	WPARAM wParam = Window::Run(main);
 
	SafeDelete(main);
 
	return wParam;
}

 

 

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