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Diffstat (limited to 'docs/tomes/05-render.md')
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diff --git a/docs/tomes/05-render.md b/docs/tomes/05-render.md index cf51b41..18796b9 100644 --- a/docs/tomes/05-render.md +++ b/docs/tomes/05-render.md @@ -1258,6 +1258,27 @@ and `ICamera::GetTransformMatrix`, plus frustum/clip methods. These names prove that a transform-matrix interface exists, but give neither method slots nor a matrix convention; they must not be treated as a usable renderer ABI yet. +### Buffering-camera projection path from static Terrain analysis + +A further headless-IDA review of the same GOG `Terrain.dll` identifies a +concrete `CBufferingCamera` implementation path without requiring a live game +process. Its method at RVA `0x4D740` copies exactly 64 bytes (16 dwords) into +the component at offset `+0x10`. Its frame-preparation method at RVA `0x4D9C0` +queries a viewport rectangle through a virtual method at `+0x3C`, derives its +width, height, centre and an aspect ratio from that rectangle, and obtains +projection data through the camera interface. Projection type `0` uses a +component float at offset `+0x234` as an angle passed to `tan(angle / 2)`; +projection type `2` obtains a five-float block through a virtual method at +`+0x70`. Any other non-zero type raises `Not supported projection type`. + +This is sufficient to prove that original viewport and projection state are +live camera inputs, rather than a fixed diagnostic projection. It does **not** +yet prove matrix row/column convention, angle units, near/far field mapping, +handedness, or the initial mission camera object. In particular, the exported +string-labelled `ICamera::SetTransformMatrix` (RVA `0x4F830`) and +`ICamera::GetTransformMatrix` (RVA `0x4F850`) are both obsolete-call stubs, so +they are not a usable method ABI. + `Land.msh` использует отдельный geometry-only bridge: validated `TerrainFace28` сохраняет source triangle order, а его positions и packed UV0 попадают в тот же static vertex/index upload path. Для текущего диагностического viewer XY bounds |