From fad942eb5e394a0dd41ce836b127d4c0ae831665 Mon Sep 17 00:00:00 2001
From: thecreatorgrey <graybear150@gmail.com>
Date: Wed, 24 Jul 2024 17:24:47 -0400
Subject: [PATCH] Added camera noise shader

---
 .../screenspace_shaders/camera_noise.py       | 50 +++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 ursina/shaders/screenspace_shaders/camera_noise.py

diff --git a/ursina/shaders/screenspace_shaders/camera_noise.py b/ursina/shaders/screenspace_shaders/camera_noise.py
new file mode 100644
index 00000000..0cd943ed
--- /dev/null
+++ b/ursina/shaders/screenspace_shaders/camera_noise.py
@@ -0,0 +1,50 @@
+from ursina import Shader
+
+
+camera_noise_shader = Shader(
+fragment='''
+#version 430
+
+uniform sampler2D tex;
+uniform float noise_offset = 1;
+uniform float strength = 1;
+in vec2 uv;
+out vec4 color;
+
+void main() {
+    vec3 rgb = texture(tex, uv).rgb;
+
+    float noise = fract(sin(dot(uv+noise_offset, vec2(12.9898, 78.233))) * 43758.5453);
+    noise -= .5;
+    noise *= strength;
+
+    rgb += noise;
+
+    color = vec4(rgb.r, rgb.g, rgb.b, 1.0);
+}
+
+''',
+geometry='',
+default_input={
+    'noise_offset':1,
+    'strength':.2
+})
+
+
+
+if __name__ == '__main__':
+    from ursina import *
+    app = Ursina()
+
+    e = Entity(model='sphere', color=color.orange)
+    e = Entity(model='cube', y=-1)
+    camera.shader = camera_noise_shader
+    EditorCamera()
+
+    #camera.set_shader_input("strength", .2) 
+
+    def update():
+        # Since there isn't really a way to generate pseudorandom numbers in GLSL by themselves, this needs to be put here, otherwise the noise will be static.
+        camera.set_shader_input("noise_offset", random.randint(0, 100)/100)
+
+    app.run()