From 52742badf8b28dd956e3b0a2a6d6e9b41c223367 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sun, 20 Nov 2022 11:59:00 +0000
Subject: Don't render zero directional light

---
 ui/sceneRenderer.cpp | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

(limited to 'ui')

diff --git a/ui/sceneRenderer.cpp b/ui/sceneRenderer.cpp
index c3cff7a..2202906 100644
--- a/ui/sceneRenderer.cpp
+++ b/ui/sceneRenderer.cpp
@@ -107,11 +107,13 @@ SceneRenderer::setAmbientLight(const glm::vec3 & colour) const
 void
 SceneRenderer::setDirectionalLight(const glm::vec3 & colour, const glm::vec3 & direction) const
 {
-	dirLight.use();
-	dirLight.setDirectionalLight(colour, direction);
-	glBindVertexArray(displayVAO);
-	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
-	glBindVertexArray(0);
+	if (colour.r > 0 || colour.g > 0 || colour.b > 0) {
+		dirLight.use();
+		dirLight.setDirectionalLight(colour, direction);
+		glBindVertexArray(displayVAO);
+		glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+		glBindVertexArray(0);
+	}
 }
 
 SceneRenderer::DirectionalLightProgram::DirectionalLightProgram() :
-- 
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