Geometry instancing Szécsi László

copy-paste-rename gg009-Gui folder vcxproj, filters átnevezés solution/add existing project rename project working dir: $(SolutionDir) Project Properties/Configuration Properties/Debugging/Command Arguments --solutionPath:"$(SolutionDir)" --projectPath:"$(ProjectDir)" build, run

#include "Mesh/Instanced.h"

index buffer + vertex bufferek + instance bufferek + elemleírás konstruktor összebuherálja az egyes bufferekhez kapott elemleírásokat draw metódus context->IASetIndexBuffer(indexBuffer, indexFormat, 0); context->IASetVertexBuffers(0, nVertexBuffers, vertexBuffers, vertexStrides, zeros); context->DrawIndexedInstanced(nIndices, nInstances, 0, 0, 0);

using namespace Egg::Math; Egg::Math::float4x4 modelMatrices[200]; for(int iInstance=0; iInstance<200; iInstance++ ) modelMatrices[iInstance] = float4x4::translation( float3::random(0, 20) ).transpose();

D3D11_INPUT_ELEMENT_DESC modelMatrixElements[4] = { { "INSTANCEMODEL", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 0 * sizeof(float4), D3D11_INPUT_PER_INSTANCE_DATA, 1}, { "INSTANCEMODEL", 1, DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 1 * sizeof(float4), D3D11_INPUT_PER_INSTANCE_DATA, 1}, { "INSTANCEMODEL", 2, DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 2 * sizeof(float4), D3D11_INPUT_PER_INSTANCE_DATA, 1}, { "INSTANCEMODEL", 3, DXGI_FORMAT_R32G32B32A32_FLOAT, 1, 3 * sizeof(float4), D3D11_INPUT_PER_INSTANCE_DATA, 1} }; Egg::Mesh::InstanceBufferDesc instanceBufferDesc; instanceBufferDesc.elements = modelMatrixElements; instanceBufferDesc.nElements = 4; instanceBufferDesc.instanceStride = sizeof(float4x4); instanceBufferDesc.instanceData = modelMatrices;

Egg::Mesh::Instanced::P instancedMesh = Egg::Mesh::Instanced::create( device, 200, &instanceBufferDesc, 1, indexedMesh); ID3DX11EffectPass* basicPass = effect- >GetTechniqueByName("instanced")- >GetPassByName("instanced"); Egg::Mesh::Material::P envmappedMaterial = Egg::Mesh::Material::create(basicPass, 0); shadedMesh = binder- >bindMaterial(envmappedMaterial, instancedMesh);

struct IaosInstanced { float4 pos: POSITION; float3 normal : NORMAL; float2 tex : TEXCOORD; float4x4 instanceModelMatrix: INSTANCEMODEL; }; VsosTrafo vsInstanced(IaosInstanced input) { VsosTrafo output = (VsosTrafo)0; output.worldPos = mul(input.pos, input.instanceModelMatrix); output.pos = mul(output.worldPos, modelViewProjMatrix); output.normal = mul( float4(input.normal.xyz, 0.0), input.instanceModelMatrix); output.tex = input.tex; return output; } #9.0 modellel nem kéne szorozni, mert ugye már megvolt model inverse transposed csak akkor egyezik meg a modellel, ha csak eltolás+forgatás+izometrikus skálázás van

technique11 instanced { pass instanced { SetVertexShader ( CompileShader( vs_5_0, vsInstanced() ) ); SetPixelShader( CompileShader( ps_5_0, psEnvMapped() ) ); } #9.0

instancedMesh tagvaltozóba – animateből elérjük, releaseResourcesban reset animate – instance buffer lekérése – device->GetImmediateContext – instance buffer mappelése – feltöltése időfüggő (de nem random!) adattal – unmap – context release