130 lines
3.6 KiB
C++
130 lines
3.6 KiB
C++
#include "Mesh.h"
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#include "Utilities.h"
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#include "Vertex.h"
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#include <DirectXMath.h>
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using namespace DirectX;
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UINT Mesh::init(ID3D11Device* pD3DDevice)
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{
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UINT error = 0;
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error = createVertexBuffer(pD3DDevice);
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CheckError(error);
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error = createIndexBuffer(pD3DDevice);
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CheckError(error);
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// create world matrix
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XMStoreFloat4x4(&_worldMatrix, XMMatrixIdentity());
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return 0;
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}
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void Mesh::update(FLOAT dt)
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{
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static FLOAT x = 0.0f;
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static FLOAT y = 0.0f;
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static FLOAT z = 0.0f;
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static FLOAT rot = 0.0f;
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rot += 1.0f * dt;
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FLOAT move = 1.0f * dt;
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if ((GetAsyncKeyState(VK_LEFT) & 0x8000) || (GetAsyncKeyState('A') & 0x8000)) x -= move;
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if ((GetAsyncKeyState(VK_RIGHT) & 0x8000) || (GetAsyncKeyState('D') & 0x8000)) x += move;
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if ((GetAsyncKeyState(VK_UP) & 0x8000) || (GetAsyncKeyState('W') & 0x8000)) y += move;
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if ((GetAsyncKeyState(VK_DOWN) & 0x8000) || (GetAsyncKeyState('S') & 0x8000)) y -= move;
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if ((GetAsyncKeyState(VK_ADD) & 0x8000) || (GetAsyncKeyState('Q') & 0x8000)) z -= move;
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if ((GetAsyncKeyState(VK_SUBTRACT) & 0x8000) || (GetAsyncKeyState('E') & 0x8000)) z += move;
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XMMATRIX translation = XMMatrixTranslation(x, y, z);
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XMMATRIX rotation = XMMatrixRotationRollPitchYaw(0.0f, 0.0f, 0.0f);
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XMMATRIX scale = XMMatrixScaling(1.0f, 1.0f, 1.0f);
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XMVECTOR det = XMMatrixDeterminant(translation);
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XMStoreFloat4x4(&_worldMatrix, scale * rotation * translation);
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}
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void Mesh::render(ID3D11DeviceContext* pD3DDeviceContext)
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{
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// set data
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static UINT offset = 0;
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pD3DDeviceContext->IASetVertexBuffers(0, 1, &_pVertexBuffer, &_vertexStride, &offset);
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pD3DDeviceContext->IASetIndexBuffer(_pIndexBuffer, DXGI_FORMAT_R16_UINT, 0);
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pD3DDeviceContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
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// draw
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pD3DDeviceContext->DrawIndexed(_indexCount, 0, 0);
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}
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void Mesh::deInit()
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{
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safeRelease(_pIndexBuffer);
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safeRelease(_pVertexBuffer);
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}
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UINT Mesh::createVertexBuffer(ID3D11Device* pD3DDevice)
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{
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// describe vertex buffer content
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// quad with color
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Vertex vertices[] = { Vertex(-0.5f, 0.5f, 0.0f, 255, 0, 0),
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Vertex(0.5f, 0.5f, 0.0f, 0, 255, 0),
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Vertex(0.5f, -0.5f, 0.0f, 255, 0, 255),
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Vertex(-0.5f, -0.5f, 0.0f, 0, 0, 255) };
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// quad with uv & normal
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//Vertex vertices[] = {
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// Vertex(-0.5f, 0.5f, 0.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f),
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// Vertex(0.5f, 0.5f, 0.0f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f),
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// Vertex(0.5f, -0.5f, 0.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f),
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// Vertex(-0.5f, -0.5f, 0.0f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f)
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//};
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// general data
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_vertexCount = std::size(vertices);
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_vertexStride = sizeof(Vertex);
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// create vertex buffer object
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D3D11_BUFFER_DESC desc = {};
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desc.ByteWidth = _vertexCount * _vertexStride; // size of vertex buffer in bytes
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desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
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desc.Usage = D3D11_USAGE_IMMUTABLE; // https://learn.microsoft.com/en-us/windows/win32/api/d3d11/ne-d3d11-d3d11_usage
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D3D11_SUBRESOURCE_DATA data = {};
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data.pSysMem = vertices;
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HRESULT hr = pD3DDevice->CreateBuffer(&desc, &data, &_pVertexBuffer);
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CheckFailed(hr, 30);
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return 0;
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}
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UINT Mesh::createIndexBuffer(ID3D11Device* pD3DDevice)
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{
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// describe index buffer content
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WORD indices[] = {
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0,1,2,
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0,2,3
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};
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// general data
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_indexCount = std::size(indices);
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// create index buffer object
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D3D11_BUFFER_DESC desc = {};
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desc.ByteWidth = _indexCount * sizeof(WORD); // size of index buffer in bytes
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desc.BindFlags = D3D11_BIND_INDEX_BUFFER;
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desc.Usage = D3D11_USAGE_IMMUTABLE;
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D3D11_SUBRESOURCE_DATA data = {};
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data.pSysMem = indices;
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HRESULT hr = pD3DDevice->CreateBuffer(&desc, &data, &_pIndexBuffer);
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CheckFailed(hr, 32);
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return 0;
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}
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