From 5fdfe7c90f2f352c77a214cda7b3f9a3c4b79571 Mon Sep 17 00:00:00 2001
From: Petr <60181770+xdanca01@users.noreply.github.com>
Date: Fri, 14 Jun 2024 14:27:31 +0200
Subject: [PATCH] Update SZP08_modelovani_a_projekce.ad
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Nejdříve se musí provést depth mapping a až teprve můžeme provést perspective division. Je to napsáno i v citaci: http://learnwebgl.brown37.net/08_projections/projections_perspective.html


    Translate the apex of the frustum to the origin. (Yellow matrix)
    Scale the depth values (z) into a normalized range (-1,+1) (and setup for division by (-z)). (Purple matrix)
    Perform the perspective calculation. (Gray matrix)
    Scale the 2D (x’,y’) values in the viewing window to a 2-by-2 unit square; (-1,-1) to (+1,+1). (Cyan matrix)
---
 szmgr/SZP08_modelovani_a_projekce.ad | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/szmgr/SZP08_modelovani_a_projekce.ad b/szmgr/SZP08_modelovani_a_projekce.ad
index 5f100ce..5f13a25 100644
--- a/szmgr/SZP08_modelovani_a_projekce.ad
+++ b/szmgr/SZP08_modelovani_a_projekce.ad
@@ -292,7 +292,7 @@ Výsledná matice je:
 
 [stem]
 ++++
-P_\text{persp} =  M_\text{depth} \cdot S \cdot D \cdot T =
+P_\text{persp} =  S \cdot D \cdot M_\text{depth} \cdot T =
 
 \begin{bmatrix}
     \textcolor{green}{\frac{2 \cdot \text{near}}{\text{right} - \text{left}}}