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Implement IDirect3DRMViewport::Transform()

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This commit is contained in:
Anders Jenbo 2025-06-04 04:02:55 +02:00
parent 0ac7fee23c
commit d57f1bd784
2 changed files with 46 additions and 11 deletions
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55
miniwin/src/d3drm/d3drmviewport.cpp
View File

@ -122,9 +122,9 @@ HRESULT Direct3DRMViewportImpl::CollectSceneData()
std::vector<PositionColorVertex> verts;
// Compute camera matrix
D3DRMMATRIX4D cameraWorld, viewMatrix;
D3DRMMATRIX4D cameraWorld;
ComputeFrameWorldMatrix(m_camera, cameraWorld);
D3DRMMatrixInvertOrthogonal(viewMatrix, cameraWorld);
D3DRMMatrixInvertOrthogonal(m_viewMatrix, cameraWorld);
std::function<void(IDirect3DRMFrame*, D3DRMMATRIX4D)> recurseFrame;
std::function<void(IDirect3DRMFrame*, D3DRMMATRIX4D)> recurseChildren;
@ -270,12 +270,12 @@ HRESULT Direct3DRMViewportImpl::CollectSceneData()
// View transform
D3DVECTOR viewPos;
viewPos.x = worldPos.x * viewMatrix[0][0] + worldPos.y * viewMatrix[1][0] +
worldPos.z * viewMatrix[2][0] + viewMatrix[3][0];
viewPos.y = worldPos.x * viewMatrix[0][1] + worldPos.y * viewMatrix[1][1] +
worldPos.z * viewMatrix[2][1] + viewMatrix[3][1];
viewPos.z = worldPos.x * viewMatrix[0][2] + worldPos.y * viewMatrix[1][2] +
worldPos.z * viewMatrix[2][2] + viewMatrix[3][2];
viewPos.x = worldPos.x * m_viewMatrix[0][0] + worldPos.y * m_viewMatrix[1][0] +
worldPos.z * m_viewMatrix[2][0] + m_viewMatrix[3][0];
viewPos.y = worldPos.x * m_viewMatrix[0][1] + worldPos.y * m_viewMatrix[1][1] +
worldPos.z * m_viewMatrix[2][1] + m_viewMatrix[3][1];
viewPos.z = worldPos.x * m_viewMatrix[0][2] + worldPos.y * m_viewMatrix[1][2] +
worldPos.z * m_viewMatrix[2][2] + m_viewMatrix[3][2];
// View transform
D3DVECTOR viewNorm;
@ -440,14 +440,16 @@ void Direct3DRMViewportImpl::UpdateProjectionMatrix()
float f = m_front / m_field;
float depth = m_back - m_front;
D3DRMMATRIX4D perspective = {
D3DRMMATRIX4D projection = {
{f, 0, 0, 0},
{0, f * aspect, 0, 0},
{0, 0, m_back / depth, 1},
{0, 0, (-m_front * m_back) / depth, 0},
};
m_renderer->SetProjection(perspective, m_front, m_back);
memcpy(m_projectionMatrix, projection, sizeof(D3DRMMATRIX4D));
m_renderer->SetProjection(projection, m_front, m_back);
}
D3DVALUE Direct3DRMViewportImpl::GetField()
@ -467,7 +469,38 @@ DWORD Direct3DRMViewportImpl::GetHeight()
HRESULT Direct3DRMViewportImpl::Transform(D3DRMVECTOR4D* screen, D3DVECTOR* world)
{
MINIWIN_NOT_IMPLEMENTED();
D3DRMVECTOR4D worldVec = {world->x, world->y, world->z, 1.0f};
D3DRMVECTOR4D viewVec;
viewVec.x = m_viewMatrix[0][0] * worldVec.x + m_viewMatrix[1][0] * worldVec.y + m_viewMatrix[2][0] * worldVec.z +
m_viewMatrix[3][0] * worldVec.w;
viewVec.y = m_viewMatrix[0][1] * worldVec.x + m_viewMatrix[1][1] * worldVec.y + m_viewMatrix[2][1] * worldVec.z +
m_viewMatrix[3][1] * worldVec.w;
viewVec.z = m_viewMatrix[0][2] * worldVec.x + m_viewMatrix[1][2] * worldVec.y + m_viewMatrix[2][2] * worldVec.z +
m_viewMatrix[3][2] * worldVec.w;
viewVec.w = m_viewMatrix[0][3] * worldVec.x + m_viewMatrix[1][3] * worldVec.y + m_viewMatrix[2][3] * worldVec.z +
m_viewMatrix[3][3] * worldVec.w;
screen->x = viewVec.x * m_projectionMatrix[0][0] + viewVec.y * m_projectionMatrix[1][0] +
viewVec.z * m_projectionMatrix[2][0] + viewVec.w * m_projectionMatrix[3][0];
screen->y = viewVec.x * m_projectionMatrix[0][1] + viewVec.y * m_projectionMatrix[1][1] +
viewVec.z * m_projectionMatrix[2][1] + viewVec.w * m_projectionMatrix[3][1];
screen->z = viewVec.x * m_projectionMatrix[0][2] + viewVec.y * m_projectionMatrix[1][2] +
viewVec.z * m_projectionMatrix[2][2] + viewVec.w * m_projectionMatrix[3][2];
screen->w = viewVec.x * m_projectionMatrix[0][3] + viewVec.y * m_projectionMatrix[1][3] +
viewVec.z * m_projectionMatrix[2][3] + viewVec.w * m_projectionMatrix[3][3];
float invW = 1.0f / screen->w;
float ndcX = screen->x * invW;
float ndcY = screen->y * invW;
screen->x = (ndcX * 0.5f + 0.5f) * m_width;
screen->y = (1.0f - (ndcY * 0.5f + 0.5f)) * m_height;
// Undo perspective divice
screen->x *= screen->z;
screen->y *= screen->w;
return DD_OK;
}

2
miniwin/src/internal/d3drmviewport_impl.h
View File

@ -41,6 +41,8 @@ struct Direct3DRMViewportImpl : public Direct3DRMObjectBaseImpl<IDirect3DRMViewp
D3DCOLOR m_backgroundColor = 0xFF000000;
DWORD m_width;
DWORD m_height;
D3DRMMATRIX4D m_viewMatrix;
D3DRMMATRIX4D m_projectionMatrix;
IDirect3DRMFrame* m_rootFrame = nullptr;
IDirect3DRMFrame* m_camera = nullptr;
D3DVALUE m_front = 1.f;