From: Hector Martin <hector@marcansoft.com>
Date: Sat, 18 Dec 2010 19:57:21 +0000 (+0100)
Subject: Fix broken perspective transform matrix
X-Git-Url: https://gitweb.aptx.org/?a=commitdiff_plain;h=88424dd739b92608cdc754b884526d7ee649656a;p=openlase-old.git

Fix broken perspective transform matrix
---

diff --git a/examples/simple.c b/examples/simple.c
index 3cc7f3a..5776a14 100644
--- a/examples/simple.c
+++ b/examples/simple.c
@@ -63,8 +63,8 @@ int main (int argc, char *argv[])
 	while(1) {
 		olLoadIdentity3();
 		olLoadIdentity();
-		olPerspective(24, 1, 1, 100);
-		olTranslate3(0, 0, 4);
+		olPerspective(60, 1, 1, 100);
+		olTranslate3(0, 0, -3);
 
 		for(i=0; i<2; i++) {
 			olScale3(0.6, 0.6, 0.6);
diff --git a/libol/libol.c b/libol/libol.c
index 1eb389b..7144f91 100644
--- a/libol/libol.c
+++ b/libol/libol.c
@@ -1118,10 +1118,10 @@ void olSetAudioCallback(AudioCallbackFunc f)
 void olFrustum (float l, float r, float b, float t, float n, float f)
 {
 	float m[16] = {
-		(2*n)/(r-l),  0,            (r+l)/(r-l),     0,
-		0,            (2*n)/(t-b),  (t+b)/(t-b),     0,
-		0,            0,            -(f+n)/(f-n),    (-2*f*n)/(f-n),
-		0,            0,            -1,              0,
+		(2*n)/(r-l),  0,            0,               0,
+		0,            (2*n)/(t-b),  0,               0,
+		(r+l)/(r-l),  (t+b)/(t-b),  -(f+n)/(f-n),   -1,
+		0,            0,            (-2*f*n)/(f-n),  0,
 	};
 
 	olMultMatrix3(m);