응애맘마조
230508 강의 본문
4일부터 메쉬(Mesh)에 대해서 강의했었습니다.
4일에는 사각형을 그렸습니다.
#include "framework.h"
Mesh::Mesh()
{
vertexType = VertexType::P;
primitiveTopology = D3D11_PRIMITIVE_TOPOLOGY_LINESTRIP;
vertexCount = 4;
byteWidth = sizeof(VertexP);
VertexP* Vertex = new VertexP[vertexCount];
indexCount = 5;
indices = new UINT[indexCount];
Vertex[0].position = Vector3(0, 0, 1);
Vertex[1].position = Vector3(0, 1, 1);
Vertex[2].position = Vector3(1, 1, 1);
Vertex[3].position = Vector3(1, 0, 1);
indices[0] = 0;
indices[1] = 1;
indices[2] = 2;
indices[3] = 3;
indices[4] = 0;
vertices = Vertex;
//CreateVertexBuffer
{
D3D11_BUFFER_DESC desc;
desc = { 0 };
desc.Usage = D3D11_USAGE_DEFAULT;
desc.ByteWidth = byteWidth * vertexCount;
desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
D3D11_SUBRESOURCE_DATA data = { 0 };
data.pSysMem = vertices;
HRESULT hr = D3D->GetDevice()->CreateBuffer(&desc, &data, &vertexBuffer);
assert(SUCCEEDED(hr));
}
//Create Index Buffer
{
D3D11_BUFFER_DESC desc;
ZeroMemory(&desc, sizeof(D3D11_BUFFER_DESC));
desc.ByteWidth = sizeof(UINT) * indexCount;
desc.BindFlags = D3D11_BIND_INDEX_BUFFER;
D3D11_SUBRESOURCE_DATA data = { 0 };
data.pSysMem = indices;
HRESULT hr = D3D->GetDevice()->CreateBuffer(&desc, &data, &indexBuffer);
assert(SUCCEEDED(hr));
}
}
Mesh::~Mesh()
{
}
void Mesh::Set()
{
UINT offset = 0;
D3D->GetDC()->IASetVertexBuffers(0,
1,
&vertexBuffer,
&byteWidth,
&offset);
D3D->GetDC()->IASetPrimitiveTopology
(primitiveTopology);
D3D->GetDC()->IASetIndexBuffer(indexBuffer, DXGI_FORMAT_R32_UINT, 0);
}Vertex와 Index에서 정점의 개수와 그리는 순서를 지정했습니다. 그럼 ImGui와 함께 붉은색의 사각형이 표시가 됩니다.
이대로 실행을 하면 사각형이 그려졌고 정점을 8개로 하고 라인 그리기를 하면 정육면체가 나오게 되어 사람을 그리는 과제처럼 나타낼 수 있게 됩니다.
오늘 했던 것을 원을 그린 것입니다. 여기서는 극좌표를 사용합니다. 2D에서 보통 x, y로 나타내는 좌표를 데카르트 좌표라고 합니다. 극좌표는 삼각함수를 사용하여 기준점으로부터의 거리와 극점을 지나는 기준선에 대한 각도로 위치를 나타내는 방법입니다. 이 원리로 원을 그릴 때나 원의 둘레도 극좌표로 나타낼 수 있습니다.
#include "framework.h"
Mesh::Mesh()
{
vertexType = VertexType::P;
primitiveTopology = D3D11_PRIMITIVE_TOPOLOGY_LINESTRIP;
vertexCount = 360;
byteWidth = sizeof(VertexP);
VertexP* Vertex = new VertexP[vertexCount];
indexCount = 361;
indices = new UINT[indexCount];
for (int i = 0; i < 360; i++)
{
Vertex[i].position = Vector3(cosf(i * TORADIAN), sinf(i * TORADIAN), 1);
}
for (int i = 0; i < 360; i++)
{
indices[i] = i;
}
indices[360] = 0;
vertices = Vertex;
//CreateVertexBuffer
{
D3D11_BUFFER_DESC desc;
desc = { 0 };
desc.Usage = D3D11_USAGE_DEFAULT;
desc.ByteWidth = byteWidth * vertexCount;
desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
D3D11_SUBRESOURCE_DATA data = { 0 };
data.pSysMem = vertices;
HRESULT hr = D3D->GetDevice()->CreateBuffer(&desc, &data, &vertexBuffer);
assert(SUCCEEDED(hr));
}
//Create Index Buffer
{
D3D11_BUFFER_DESC desc;
ZeroMemory(&desc, sizeof(D3D11_BUFFER_DESC));
desc.ByteWidth = sizeof(UINT) * indexCount;
desc.BindFlags = D3D11_BIND_INDEX_BUFFER;
D3D11_SUBRESOURCE_DATA data = { 0 };
data.pSysMem = indices;
HRESULT hr = D3D->GetDevice()->CreateBuffer(&desc, &data, &indexBuffer);
assert(SUCCEEDED(hr));
}
}
Mesh::~Mesh()
{
}
void Mesh::Set()
{
UINT offset = 0;
D3D->GetDC()->IASetVertexBuffers(0,
1,
&vertexBuffer,
&byteWidth,
&offset);
D3D->GetDC()->IASetPrimitiveTopology
(primitiveTopology);
D3D->GetDC()->IASetIndexBuffer(indexBuffer, DXGI_FORMAT_R32_UINT, 0);
}
void Mesh::LoadFile(string file)
{
this->file = file;
BinaryReader in;
wstring path = L"../Contents/Mesh/" + Util::ToWString(file);
in.Open(path);
//읽기전
switch (vertexType)
{
case VertexType::P:
if (vertices)delete[](VertexP*)vertices;
break;
case VertexType::PC:
if (vertices)delete[](VertexPC*)vertices;
break;
case VertexType::PCN:
if (vertices)delete[](VertexPCN*)vertices;
break;
case VertexType::PTN:
if (vertices)delete[](VertexPTN*)vertices;
break;
case VertexType::MODEL:
if (vertices)delete[](VertexModel*)vertices;
break;
case VertexType::TERRAIN:
if (vertices)delete[](VertexTerrain*)vertices;
break;
case VertexType::PT:
if (vertices)delete[](VertexPT*)vertices;
break;
case VertexType::PS:
if (vertices)delete[](VertexPS*)vertices;
break;
case VertexType::PSV:
if (vertices)delete[](VertexPSV*)vertices;
break;
}
vertexType = (VertexType)in.UInt();
primitiveTopology = (D3D_PRIMITIVE_TOPOLOGY)in.UInt();
byteWidth = in.UInt();
vertexCount = in.UInt();
indexCount = in.UInt();
SafeDeleteArray(indices);
indices = new UINT[indexCount];
//읽고난후
switch (vertexType)
{
case VertexType::P:
{
vertices = new VertexP[vertexCount];
VertexP* vertex = (VertexP*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
vertex[i].position = in.vector3();
}
break;
}
case VertexType::PC:
{
vertices = new VertexPC[vertexCount];
VertexPC* vertex = (VertexPC*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
vertex[i].position = in.vector3();
vertex[i].color = in.color3f();
}
break;
}
case VertexType::PCN:
{
vertices = new VertexPCN[vertexCount];
VertexPCN* vertex = (VertexPCN*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
vertex[i].position = in.vector3();
vertex[i].color = in.color3f();
vertex[i].normal = in.vector3();
}
break;
}
case VertexType::PTN:
{
vertices = new VertexPTN[vertexCount];
VertexPTN* vertex = (VertexPTN*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
vertex[i].position = in.vector3();
vertex[i].uv = in.vector2();
vertex[i].normal = in.vector3();
}
break;
}
case VertexType::MODEL:
{
vertices = new VertexModel[vertexCount];
VertexModel* vertex = (VertexModel*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
vertex[i].position = in.vector3();
vertex[i].uv = in.vector2();
vertex[i].normal = in.vector3();
vertex[i].tangent = in.vector3();
vertex[i].indices = in.vector4();
vertex[i].weights = in.vector4();
}
break;
}
case VertexType::TERRAIN:
{
vertices = new VertexTerrain[vertexCount];
VertexTerrain* vertex = (VertexTerrain*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
vertex[i].position = in.vector3();
vertex[i].uv = in.vector2();
vertex[i].normal = in.vector3();
vertex[i].weights = in.Float();
}
break;
}
case VertexType::PT:
{
vertices = new VertexPT[vertexCount];
VertexPT* vertex = (VertexPT*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
vertex[i].position = in.vector3();
vertex[i].uv = in.vector2();
}
break;
}
case VertexType::PS:
{
vertices = new VertexPS[vertexCount];
VertexPS* vertex = (VertexPS*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
vertex[i].position = in.vector3();
vertex[i].size = in.vector2();
}
break;
}
case VertexType::PSV:
{
vertices = new VertexPSV[vertexCount];
VertexPSV* vertex = (VertexPSV*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
vertex[i].position = in.vector3();
vertex[i].size = in.vector2();
vertex[i].velocity = in.vector3();
}
break;
}
}
for (UINT i = 0; i < indexCount; i++)
{
indices[i] = in.UInt();
}
in.Close();
SafeRelease(vertexBuffer);
SafeRelease(indexBuffer);
//CreateVertexBuffer
{
D3D11_BUFFER_DESC desc;
desc = { 0 };
desc.Usage = D3D11_USAGE_DEFAULT;
desc.ByteWidth = byteWidth * vertexCount;
desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
D3D11_SUBRESOURCE_DATA data = { 0 };
data.pSysMem = vertices;
HRESULT hr = D3D->GetDevice()->CreateBuffer(&desc, &data, &vertexBuffer);
assert(SUCCEEDED(hr));
}
//Create Index Buffer
{
D3D11_BUFFER_DESC desc;
ZeroMemory(&desc, sizeof(D3D11_BUFFER_DESC));
desc.ByteWidth = sizeof(UINT) * indexCount;
desc.BindFlags = D3D11_BIND_INDEX_BUFFER;
D3D11_SUBRESOURCE_DATA data = { 0 };
data.pSysMem = indices;
HRESULT hr = D3D->GetDevice()->CreateBuffer(&desc, &data, &indexBuffer);
assert(SUCCEEDED(hr));
}
}
void Mesh::SaveFile(string file)
{
this->file = file;
BinaryWriter out;
wstring path = L"../Contents/Mesh/" + Util::ToWString(file);
out.Open(path);
out.UInt((UINT)vertexType);
out.UInt((UINT)primitiveTopology);
out.UInt(byteWidth);
out.UInt(vertexCount);
out.UInt(indexCount);
switch (vertexType)
{
case VertexType::P:
{
VertexP* vertex = (VertexP*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
out.vector3(vertex[i].position);
}
break;
}
case VertexType::PC:
{
VertexPC* vertex = (VertexPC*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
out.vector3(vertex[i].position);
out.color3f(vertex[i].color);
}
break;
}
case VertexType::PCN:
{
VertexPCN* vertex = (VertexPCN*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
out.vector3(vertex[i].position);
out.color3f(vertex[i].color);
out.vector3(vertex[i].normal);
}
break;
}
case VertexType::PTN:
{
VertexPTN* vertex = (VertexPTN*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
out.vector3(vertex[i].position);
out.vector2(vertex[i].uv);
out.vector3(vertex[i].normal);
}
break;
}
case VertexType::MODEL:
{
VertexModel* vertex = (VertexModel*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
out.vector3(vertex[i].position);
out.vector2(vertex[i].uv);
out.vector3(vertex[i].normal);
out.vector3(vertex[i].tangent);
out.vector4(vertex[i].indices);
out.vector4(vertex[i].weights);
}
break;
}
case VertexType::TERRAIN:
{
VertexTerrain* vertex = (VertexTerrain*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
out.vector3(vertex[i].position);
out.vector2(vertex[i].uv);
out.vector3(vertex[i].normal);
out.Float(vertex[i].weights);
}
break;
}
case VertexType::PT:
{
VertexPT* vertex = (VertexPT*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
out.vector3(vertex[i].position);
out.vector2(vertex[i].uv);
}
break;
}
case VertexType::PS:
{
VertexPS* vertex = (VertexPS*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
out.vector3(vertex[i].position);
out.vector2(vertex[i].size);
}
break;
}
case VertexType::PSV:
{
VertexPSV* vertex = (VertexPSV*)vertices;
for (UINT i = 0; i < vertexCount; i++)
{
out.vector3(vertex[i].position);
out.vector2(vertex[i].size);
out.vector3(vertex[i].velocity);
}
break;
}
}
for (UINT i = 0; i < indexCount; i++)
{
out.UInt(indices[i]);
}
out.Close();
}2D때와 비슷하게 0도부터 359도까지 돌리면서 점을 찍어 각각 선으로 연결하고 마지막 360도를 0으로 해서 선을 그려 원을 완성시켰습니다.
넘어가서 입체적인 구를 그리려면 구면좌표계를 알아야 되는데
x , y , z값을 구하려면 위 사진의 공식을 사용하면 됩니다.
(출처 : https://ko.wikipedia.org/wiki/%EA%B5%AC%EB%A9%B4%EC%A2%8C%ED%91%9C%EA%B3%84)
θ(세타)가 위도, π(파이)가 경도가 됩니다.
과제는 구를 그리는 것이었습니다.
읽어주셔서 감사합니다.
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