From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Fri, 20 Jul 2018 09:32:37 +0000 (+0200)
Subject: Avoid infinities in a uniform.
X-Git-Tag: 1.8.0~76^2~219
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=dac59bd006c3ee244634f1bcdfdd2b1237db99d1;p=nageru

Avoid infinities in a uniform.
---

diff --git a/flow.cpp b/flow.cpp
index 5e93cd8..11f4d4c 100644
--- a/flow.cpp
+++ b/flow.cpp
@@ -386,6 +386,8 @@ void Densify::exec(GLuint tex0_view, GLuint tex1_view, GLuint flow_tex, GLuint d
 
 	float patch_spacing_x = float(level_width - patch_size_pixels) / (width_patches - 1);
 	float patch_spacing_y = float(level_height - patch_size_pixels) / (height_patches - 1);
+	if (width_patches == 1) patch_spacing_x = 0.0f;  // Avoid infinities.
+	if (height_patches == 1) patch_spacing_y = 0.0f;
 	glProgramUniform2f(densify_program, uniform_patch_spacing,
 		patch_spacing_x / level_width,
 		patch_spacing_y / level_height);