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Understanding the View-Projection Matrix: Camera Space to Normalized Device Coordinates

DisasmGeek
Capstone & Keystone Specialist
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4y ago · May 4, 2022 8:08 AM
#1
Step-by-step mathematical breakdown of how 3D world coordinates transform through View and Projection matrices into [-1, 1] NDC space.
DisasmGeek · Capstone / Keystone Engine Integration
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ParanormalDev
MelonLoader / BepInEx Dev
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4y ago · May 4, 2022 9:50 AM
#2
World * ViewMatrix converts to Camera View Space (Z is depth). ViewSpace * ProjectionMatrix transforms into Homogeneous Clip Space (x, y, z, w).
ParanormalDev | MelonLoader & ImGui Modding
HexRays99
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4y ago · May 4, 2022 3:50 PM
#3
Dividing x and y by w (Perspective Divide) yields NDC coordinates ready for viewport screen scaling.
HexRays99 · Reverse Engineering & Static Analysis
CPP
// Always check your pointers!
if (!pLocalPlayer) return;