3D프리미티브 표시하기

3D프리미티브를 보여주는 프로그램을 작성한다.

 

리소스 추가

이번 프로그램에서는 이펙트파일을 하나 프로젝트에 추가하여 사용합니다.

이펙트파일에 대해서는 다음에 다시 알려드리겠습니다.

 

SimpleEffect.fx

float4x4 worldViewProj : WORLDVIEWPROJECTION;   struct VS_INPUT {     float4 pos   : POSITION;     float4 color : COLOR0; };   struct VS_OUTPUT {     float4 pos   : POSITION;     float4 color : COLOR0; };   VS_OUTPUT VS_TransformTec(VS_INPUT In) {       VS_OUTPUT Out=(VS_OUTPUT)0;       Out.pos  =mul(In.pos,worldViewProj);     Out.color=In.color;       return Out; }   float4 PS_TransformTec(VS_OUTPUT Out) : COLOR {     return Out.color; }   technique TransformTec {     pass P0 {         vertexShader=compile vs_2_0 VS_TransformTec();         pixelShader =compile ps_1_1 PS_TransformTec();     } }

이펙트 일에 주석을 달면 컴파일에러가…

 

float4x4 worldViewProj : WORLDVIEWPROJECTION;	월드x뷰x사영행렬
struct VS_INPUT	정점쉐이더입력구조체
struct VS_OUTPUT	정점쉐이더출력구조체
VS_OUTPUT VS_TransformTec(VS_INPUT In)	정점쉐이더를 처리해주는 함수
float4 PS_TransformTec(VS_OUTPUT Out) : COLOR	픽셀쉐이더를 처리해주는 함수
technique TransformTec	테크닉 (메인함수와 비슷합니다.)

 

소스코드 편집

Game1.cs를 편집합니다.

Game1.cs

using System; using System.Collections.Generic; using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Audio; using Microsoft.Xna.Framework.Graphics; using Microsoft.Xna.Framework.Input; using Microsoft.Xna.Framework.Storage; using Microsoft.Xna.Framework.Content;   //3D프리미티브 표시하기 namespace PrimitiveEx {     public class Game1 : Game {         //시스템         private GraphicsDeviceManager graphics;         private ContentManager        content;             //3D프리미티브         private Matrix           worldViewProj; //월드x뷰x사영행렬         private Effect                effect;       //이펙트         private VertexDeclaration     cubeVertexDec; //정점정의         private VertexPositionColor[] cubeVertices; //정점s         private VertexBuffer          vertexBuffer; //정점버퍼         private short[]               cubeIndices;  //인덱스리스트         private IndexBuffer           indexBuffer;  //인덱스버퍼           //constructor         public Game1() {             graphics = new GraphicsDeviceManager(this);             content  = new ContentManager(Services);         }           //좌표변환 초기화         private void InitializeTransform() {             //월드 매트릭스             Matrix world =                 Matrix.CreateRotationX((float)Math.PI / 6.0f) * //X축30도회전                 Matrix.CreateRotationY((float)Math.PI / 6.0f);  //Y축30도회전               //뷰 매트릭스             Matrix view = Matrix.CreateLookAt(                 new Vector3(0, 0, 5), //시점                 Vector3.Zero,         //참조점                 Vector3.Up);          //UP레벨               //사영 매트릭스             Matrix projection = Matrix.CreatePerspectiveFieldOfView(                 (float)Math.PI / 4.0f, //시야각(라디안단위)                 (float)graphics.GraphicsDevice.Viewport.Width /                 (float)graphics.GraphicsDevice.Viewport.Height,                 1.0f,                 //니어클립면의 거리                 100.0f);              //파 클립면의 거리               //월드x뷰x사영 매트릭스             worldViewProj = world * view * projection;         }           //이펙트 읽어오기         private void InitializeEffect() {             effect = content.Load<Effect>("SimpleEffect");              //이펙트 파일             effect.Parameters["worldViewProj"].SetValue(worldViewProj); //이어주기             effect.CurrentTechnique = effect.Techniques["TransformTec"]; //테크닉         }           //입방체 초기화         private void InitializeCube() {             //입방체 정점정의             cubeVertexDec = new VertexDeclaration(                 graphics.GraphicsDevice,            //그래픽스 디바이스                 VertexPositionColor.VertexElements); //요소배열               //정점             Vector3 topLeftFront     = new Vector3(-1.0f,  1.0f,  1.0f);             Vector3 bottomLeftFront  = new Vector3(-1.0f, -1.0f,  1.0f);             Vector3 topRightFront    = new Vector3( 1.0f,  1.0f,  1.0f);             Vector3 bottomRightFront = new Vector3( 1.0f, -1.0f,  1.0f);             Vector3 topLeftBack      = new Vector3(-1.0f,  1.0f, -1.0f);             Vector3 topRightBack     = new Vector3( 1.0f,  1.0f, -1.0f);             Vector3 bottomLeftBack   = new Vector3(-1.0f, -1.0f, -1.0f);             Vector3 bottomRightBack  = new Vector3( 1.0f, -1.0f, -1.0f);               //입방체 정점             cubeVertices = new VertexPositionColor[24];               //정면             cubeVertices[0] = new VertexPositionColor(topLeftFront,    Color.Red);             cubeVertices[1] = new VertexPositionColor(bottomLeftFront, Color.Red);             cubeVertices[2] = new VertexPositionColor(topRightFront,   Color.Red);             cubeVertices[3] = new VertexPositionColor(bottomRightFront,Color.Red);               //뒷면             cubeVertices[4] = new VertexPositionColor(topLeftBack,    Color.Orange);             cubeVertices[5] = new VertexPositionColor(topRightBack,   Color.Orange);             cubeVertices[6] = new VertexPositionColor(bottomLeftBack, Color.Orange);             cubeVertices[7] = new VertexPositionColor(bottomRightBack,Color.Orange);               //윗면             cubeVertices[8]  = new VertexPositionColor(topLeftFront,  Color.Yellow);             cubeVertices[9]  = new VertexPositionColor(topRightBack,  Color.Yellow);             cubeVertices[10] = new VertexPositionColor(topLeftBack,   Color.Yellow);             cubeVertices[11] = new VertexPositionColor(topRightFront, Color.Yellow);               //아랫면             cubeVertices[12] = new VertexPositionColor(bottomLeftFront, Color.Purple);             cubeVertices[13] = new VertexPositionColor(bottomLeftBack,  Color.Purple);             cubeVertices[14] = new VertexPositionColor(bottomRightBack, Color.Purple);             cubeVertices[15] = new VertexPositionColor(bottomRightFront,Color.Purple);               //왼쪽면             cubeVertices[16] = new VertexPositionColor(topLeftFront,   Color.Blue);             cubeVertices[17] = new VertexPositionColor(bottomLeftBack, Color.Blue);             cubeVertices[18] = new VertexPositionColor(bottomLeftFront,Color.Blue);             cubeVertices[19] = new VertexPositionColor(topLeftBack,    Color.Blue);               //오른쪽 면             cubeVertices[20] = new VertexPositionColor(topRightFront,   Color.Green);             cubeVertices[21] = new VertexPositionColor(bottomRightFront,Color.Green);             cubeVertices[22] = new VertexPositionColor(bottomRightBack, Color.Green);             cubeVertices[23] = new VertexPositionColor(topRightBack,    Color.Green);               //인덱스 리스트             cubeIndices = new short[] {                   0,  1,  2, //빨간색 앞면                  1,  3,  2,                  4,  5,  6, //귤색 뒷면                  6,  5,  7,                  8,  9, 10, //노란색 윗면                  8, 11,  9,                 12, 13, 14, //보라색 아랫면                 12, 14, 15,                 16, 17, 18, //청색 왼쪽면                 19, 17, 16,                 20, 21, 22, //녹색 오른쪽면                 23, 20, 22};               //정점 버퍼             vertexBuffer = new VertexBuffer(                 graphics.GraphicsDevice,                 cubeVertices.Length * VertexPositionColor.SizeInBytes,                 ResourceUsage.None,                 ResourceManagementMode.Automatic);             vertexBuffer.SetData<VertexPositionColor>(cubeVertices);               //인덱스 버퍼             indexBuffer = new IndexBuffer(graphics.GraphicsDevice,                 sizeof(short) * cubeIndices.Length,                 ResourceUsage.None,                 ResourceManagementMode.Automatic,                 IndexElementSize.SixteenBits);             indexBuffer.SetData<short>(cubeIndices);         }           //그래픽 로드         protected override void LoadGraphicsContent(bool loadAllContent) {             InitializeTransform();             if (loadAllContent) {                 InitializeEffect();                 InitializeCube();             }         }           //그래픽 언로드         protected override void UnloadGraphicsContent(bool unloadAllContent) {             if (unloadAllContent == true) {                 content.Unload();             }         }           //그리기         protected override void Draw(GameTime gameTime) {             //클리어             graphics.GraphicsDevice.Clear(Color.White);               //Cull모드 지정             graphics.GraphicsDevice.RenderState.CullMode =                 CullMode.CullClockwiseFace;               //정점정의             graphics.GraphicsDevice.VertexDeclaration = cubeVertexDec;               //정점버퍼지정             graphics.GraphicsDevice.Vertices[0].SetSource(                 vertexBuffer, 0, VertexPositionColor.SizeInBytes);                         //인덱스 버퍼지정             graphics.GraphicsDevice.Indices = indexBuffer;               //입방체 그리기             effect.Begin();             foreach (EffectPass pass in effect.CurrentTechnique.Passes) {                 pass.Begin();                 graphics.GraphicsDevice.DrawIndexedPrimitives(                     PrimitiveType.TriangleList,                     0,                     0,                     cubeVertices.Length,                     0,                     12);                 pass.End();             }             effect.End();             base.Draw(gameTime);         }     } }

프리미티브란 기본도형을 말함