From 2a1557aa2b4d406c92703f60f2d34283fed5fcfb Mon Sep 17 00:00:00 2001
From: talha <talha@talhaamir.xyz>
Date: Wed, 13 Mar 2024 22:54:43 +0500
Subject: Did some work on materials, refactored a few things

---
 source/shaders/light_source.fs.glsl  |  5 ++++
 source/shaders/light_source.vs.glsl  | 10 ++++++++
 source/shaders/light_subject.fs.glsl | 46 ++++++++++++++++++++++++++++++++++++
 source/shaders/light_subject.vs.glsl | 18 ++++++++++++++
 4 files changed, 79 insertions(+)
 create mode 100644 source/shaders/light_source.fs.glsl
 create mode 100644 source/shaders/light_source.vs.glsl
 create mode 100644 source/shaders/light_subject.fs.glsl
 create mode 100644 source/shaders/light_subject.vs.glsl

(limited to 'source/shaders')

diff --git a/source/shaders/light_source.fs.glsl b/source/shaders/light_source.fs.glsl
new file mode 100644
index 0000000..9e834cb
--- /dev/null
+++ b/source/shaders/light_source.fs.glsl
@@ -0,0 +1,5 @@
+#version 330 core
+out vec4 FragColor;
+void main() {
+    FragColor = vec4(1.0);
+}
diff --git a/source/shaders/light_source.vs.glsl b/source/shaders/light_source.vs.glsl
new file mode 100644
index 0000000..bf372d5
--- /dev/null
+++ b/source/shaders/light_source.vs.glsl
@@ -0,0 +1,10 @@
+#version 330 core
+layout(location = 0) in vec3 position;
+
+uniform mat4 Model;
+uniform mat4 View;
+uniform mat4 Projection;
+
+void main() {
+    gl_Position = Projection * View * Model * vec4(position.x, position.y, position.z, 1.0);
+}
diff --git a/source/shaders/light_subject.fs.glsl b/source/shaders/light_subject.fs.glsl
new file mode 100644
index 0000000..54bf700
--- /dev/null
+++ b/source/shaders/light_subject.fs.glsl
@@ -0,0 +1,46 @@
+#version 330 core
+struct Material {
+  vec3 ambient;
+  vec3 diffuse;
+  vec3 specular;
+  float shininess;
+};
+
+struct Light {
+  vec3 ambient;
+  vec3 diffuse;
+  vec3 specular;
+
+  vec3 position;
+};
+
+in vec3 fragNormal;
+in vec3 worldPosition;
+
+uniform Material  material;
+uniform Light     light;
+uniform vec3			cameraPosition;
+uniform vec3      lightColor;
+uniform sampler2D smilingTexture;
+uniform sampler2D containerTexture;
+
+out vec4 FragColor;
+
+void main() {
+		 vec3 ambientLight = light.ambient * material.ambient;
+
+//	 @note: Diffuse calculations
+     vec3 lightDir = normalize(light.position - worldPosition);
+     float diffuseStrength = max(dot(lightDir, fragNormal), 0.0);
+     vec3 diffuseLight = light.diffuse * (diffuseStrength * material.diffuse);
+
+//	 @note: Specular calculations
+		 vec3  viewDir		      = normalize(cameraPosition - worldPosition);
+		 vec3  reflectDir				= reflect(-lightDir, fragNormal);
+		 float specularity			= max(dot(viewDir, reflectDir), 0.0);
+		 float shinePower				= pow(specularity, material.shininess);
+		 vec3  specularLight		= light.specular * (shinePower * material.specular);
+
+     vec3 color = ambientLight + diffuseLight + specularLight;
+     FragColor = vec4(color, 1.0);
+}
diff --git a/source/shaders/light_subject.vs.glsl b/source/shaders/light_subject.vs.glsl
new file mode 100644
index 0000000..327e896
--- /dev/null
+++ b/source/shaders/light_subject.vs.glsl
@@ -0,0 +1,18 @@
+#version 330 core
+
+layout(location = 0) in vec3 position;
+layout(location = 1) in vec3 normal;
+
+uniform mat4 Model;
+uniform mat4 View;
+uniform mat4 Projection;
+
+out vec3 fragNormal;
+out vec3 worldPosition;
+
+void main() {
+    gl_Position = Projection * View * Model * vec4(position, 1.0);
+    worldPosition = vec3(Model * vec4(position, 1.0));
+    fragNormal = mat3(transpose(inverse(Model))) * normal;
+		fragNormal = normalize(normal);
+}
-- 
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