Environment mapping
Szécsi László
Új osztály: Lab3EnvMap
copy&paste: Lab2Trafo.h ->Lab3EnvMap.h
copy&paste: Lab2Trafo.cpp ->Lab3EnvMap.cpp
copy&paste: trafo.fx -> envmap.fx
search&replace ebben a két fileban:Lab2Trafo -> Lab3EnvMap
Effect betöltésnél: envmap.fx
Lab2 példány helyett Lab3 példányt hozzunklétre
#include “Lab3EnvMap.h”
HRESULT CALLBACK OnD3D9CreateDevice(IDirect3DDevice9* pd3dDevice, constD3DSURFACE_DESC* pBackBufferSurfaceDesc,void* pUserContext )
{
engine = new Lab2Transform(pd3dDevice);
engine = new Lab3EnvMap(pd3dDevice);
Globális példány kicserélése
FILE
GraphGame.cpp
OP
del/add code
FUNC
OnD3D9CreateDevice
Első laborból copy&paste, nevezzük átquad~-ra:
class Lab3Envmap :
public EngineInterface
{
LPDIRECT3DVERTEXBUFFER9quadVertexBuffer;
struct QuadVertex{
D3DXVECTOR3 pos;
D3DXVECTOR3 tex;
};
Full viewport quad
FILE
Lab3EnvMap.h
OP
new member
CLASS
Lab3EnvMap
HRESULTLab3EnvMap::createDefaultResources(){
device->CreateVertexBuffer(
4 * sizeof(QuadVertex),D3DUSAGE_DYNAMIC|D3DUSAGE_WRITEONLY,D3DFVF_XYZ | D3DFVF_TEX1 |D3DFVF_TEXCOORDSIZE3(0),
D3DPOOL_DEFAULT,
&quadVertexBuffer, NULL);
...
Vertex buffer létrehozása
FILE
Lab3EnvMap.cpp
OP
add code
CLASS
Lab3EnvMap
METHOD
createDefaultResources
QuadVertex* vertexData;
quadVertexBuffer->Lock(0, 0, (void**)&vertexData,D3DLOCK_DISCARD);
vertexData[0].pos = D3DXVECTOR3(-1.0f, 1.0f, 0.0f);
vertexData[1].pos = D3DXVECTOR3(1.0f, 1.0f, 0.0f);
vertexData[2].pos = D3DXVECTOR3(-1.0f, -1.0f, 0.0f);
vertexData[3].pos = D3DXVECTOR3(1.0f, -1.0f, 0.0f);
vertexData[0].tex = D3DXVECTOR3(0.0f, 0.0f, 0.0f);
vertexData[1].tex = D3DXVECTOR3(1.0f, 0.0f, 0.0f);
vertexData[2].tex = D3DXVECTOR3(0.0f, 1.0f, 0.0f);
vertexData[3].tex = D3DXVECTOR3(1.0f, 1.0f, 0.0f);
quadVertexBuffer->Unlock();
Vertex buffer feltöltése
FILE
Lab3EnvMap.cpp
OP
add code
CLASS
Lab3EnvMap
METHOD
createDefaultResources
HRESULT Lab3EnvMap::
releaseDefaultResources()
{
quadVertexBuffer->Release();
return S_OK;
}
Vertex buffer felszabadítása
FILE
Lab3EnvMap.cpp
OP
add code
CLASS
Lab3EnvMap
METHOD
releaseDefaultResources
...
device->BeginScene();
device->SetStreamSource(0,
quadVertexBuffer, 0,
sizeof(QuadVertex));
device->SetFVF(D3DFVF_XYZ |D3DFVF_TEX1 | D3DFVF_TEXCOORDSIZE3(0));
device->DrawPrimitive
(D3DPT_TRIANGLESTRIP, 0, 2);
device->EndScene();
}
Full viewport quad rajzolás
FILE
Lab3EnvMap.cpp
OP
edit code
CLASS
Lab3EnvMap
METHOD
render
próba
téglalap, lefedi a viewportot
Effect
Először: rajzoljuk ki a hátteret
Cube map textúra: doboz 6 oldallal
cloudyNoon.dds letöltése
Régen: NAGY doboz vagy gömb
skybox, skydome
Most már van shader amibenkiszámíthatjuk mi látszik apixelben: full viewport quad
struct QuadInput
{
float4 pos: POSITION;
float2 tex: TEXCOORD0;
};
struct QuadOutput
{
float4 pos: POSITION;
float2 tex: TEXCOORD0;
float3 worldPosMinusEye: TEXCOORD1;
};
Input-output szemantika
FILE
envmap.fx
OP
new struct
FUNC
::
float4x4 rotProjMatrixInverse;
QuadOutput vsQuad(QuadInput input)
{
QuadOutput output = (QuadOutput)0;
output.pos = input.pos;
float4 hWorldPosMinusEye = mul(input.pos,rotProjMatrixInverse);
hWorldPosMinusEye /= hWorldPosMinusEye.w;
output.worldPosMinusEye = hWorldPosMinusEye.xyz;
output.pos.z = 1; // minden mögé
output.tex = input.tex;
return output;
};
Vertex shader
FILE
envmap.fx
OP
new func
FUNC
vsQuad
textureCUBE environmentCubeTexture;
samplerCUBE environmentCubeSampler =sampler_state
{
texture = <environmentCubeTexture>;
MipFilter = Linear;
MagFilter = Linear;
MinFilter = Linear;
};
Textúra és sampler
FILE
envmap.fx
OP
new var
FUNC
::
float4 psEnvironment(QuadOutputinput) : COLOR0
{
returntexCUBE(environmentCubeSampler,input.worldPosMinusEye);
};
Pixel shader
FILE
envmap.fx
OP
new func
FUNC
psEnvironment
technique environment
{
pass P0
{
VertexShader = compile vs_3_0vsQuad();
PixelShader = compile ps_3_0psEnvironment();
}
};
Környezet háttér technique
FILE
envmap.fx
OP
new technique
FUNC
::
const D3DXVECTOR3& eyePos = *camera.GetEyePt();
D3DXMATRIX eyePosTranslationMatrix;
D3DXMatrixTranslation(&eyePosTranslationMatrix,eyePos.x, eyePos.y, eyePos.z);
D3DXMATRIX rpmi;
D3DXMatrixInverse(&rpmi, NULL,&(eyePosTranslationMatrix **camera.GetViewMatrix() **camera.GetProjMatrix()));
effect->SetMatrix("rotProjMatrixInverse",
&rpmi);
Mátrix beállítása
FILE
Lab3EnvMap.cpp
OP
add code
CLASS
Lab3EnvMap
METHOD
render
class Lab3EnvMap {
LPDIRECT3DCUBETEXTURE9 environmentCube;
Textúra változó
FILE
Lab3EnvMap.h
OP
new member
CLASS
Lab3EnvMap
HRESULTLab3EnvMap::createManagedResources()
{
D3DXCreateCubeTextureFromFile(device,L"media\\cloudyNoon.dds",&environmentCube);
Textúra betöltés
FILE
Lab3EnvMap.cpp
OP
add code
CLASS
Lab3EnvMap
METHOD
createManagedResources
HRESULTLab3EnvMap::releaseManagedResources()
{
environmentCube->Release();
Textúra felszabadítás
FILE
Lab3EnvMap.cpp
OP
add code
CLASS
Lab3EnvMap
METHOD
releaseManagedResources
effect->
SetTexture("environmentCubeTexture",environmentCube);
Textúra bekötése az effecnek
FILE
Lab3EnvMap.cpp
OP
add code
CLASS
Lab3EnvMap
METHOD
render
effect->SetTechnique("environment");
effect->Begin(&a, 0);
effect->BeginPass(0);
device->SetStreamSource(0,quadVertexBuffer, 0,sizeof(QuadVertex));
device->SetFVF(D3DFVF_XYZ |D3DFVF_TEX1 | D3DFVF_TEXCOORDSIZE3(0));
device->DrawPrimitive
(D3DPT_TRIANGLESTRIP, 0, 2);
effect->EndPass();
effect->End();
Rajzolás (pl. buggy rajzolása után)
FILE
Lab3EnvMap.cpp
OP
add code
CLASS
Lab3EnvMap
METHOD
render
Próba
égbolt
float3 eyePosition;
effect->SetFloatArray("eyePosition",(float*)camera.GetEyePt(), 3);
Szempozíció: Uniform paraméter
FILE
envmap.fx
OP
verify var
FUNC
::
Bekötése
FILE
Lab3EnvMap.cpp
OP
verify code
CLASS
Lab3EnvMap
METHOD
render
float4 psEnvMapped(TrafoOutput input) :COLOR0 {
float3 viewDir = normalize(eyePosition -input.worldPos);
float3 reflectionDir = reflect(-viewDir,input.normal);
return
texCUBE(environmentCubeSampler,reflectionDir);
}
Tükröződés a modellen
FILE
envmap.fx
OP
new func
FUNC
psEnvMapped
technique envmapped
{
pass P0
{
VertexShader = compile vs_3_0vsTrafo();
PixelShader = compile ps_3_0psEnvMapped();
}
};
Environment mapping technique
FILE
envmap.fx
OP
new technique
FUNC
::
effect->SetTechnique("envmapped");
Buggy rajzolása envmapped techniqueval
FILE
Lab3EnvMap.cpp
OP
edit code
CLASS
Lab3EnvMap
METHOD
render
float4 psEnvMapped(TrafoOutput input) :COLOR0 {
float3 viewDir = normalize(eyePosition -input.worldPos);
float3 reflectionDir = reflect(-viewDir,input.normal);
return
tex2D(kdMapSampler, input.tex) + 0.5 *
texCUBE(environmentCubeSampler,reflectionDir);
}
Kd textúra
FILE
envmap.fx
OP
add code
FUNC
psEnvMapped