From 8ae83ad7cd0645b9a280c1954a41cbe1084a959f Mon Sep 17 00:00:00 2001
From: Amy Retzerau <amy.retzerau@gmail.com>
Date: Wed, 27 Aug 2025 16:55:51 +0200
Subject: [PATCH] feat: aspect ration correction

---
 main.cpp | 9 ++++++---
 sdf.fs   | 5 ++++-
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/main.cpp b/main.cpp
index 499a577..4a4b430 100644
--- a/main.cpp
+++ b/main.cpp
@@ -15,6 +15,7 @@ const char *fragmentShaderSource =
 {
     glViewport(0, 0, wdth, height);
 }*/
+float aspect = 1.0;
 
 void processInput(GLFWwindow *window) {
     if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
@@ -70,6 +71,7 @@ unsigned int compShader() {
 
 void framebuffer_size_callback(GLFWwindow *window, int width, int height) {
     glViewport(0, 0, width, height);
+    aspect = float(width) / height;
 }
 
 int main(int argc, char **argv) {
@@ -98,7 +100,7 @@ int main(int argc, char **argv) {
 
     glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
 
-    unsigned int shaderProgramm = compShader();
+    unsigned int shaderProgram = compShader();
 
     FullScreenQuad fsq{};
 
@@ -109,8 +111,9 @@ int main(int argc, char **argv) {
         glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
         glClear(GL_COLOR_BUFFER_BIT);
 
-        glUseProgram(shaderProgramm);
-
+        glUseProgram(shaderProgram);
+        int aspectLocation = glGetUniformLocation(shaderProgram, "aspect");
+        glUniform1f(aspectLocation, aspect);
         glBindVertexArray(fsq.getVAO());
         glDrawArrays(GL_TRIANGLES, 0, 6);
 
diff --git a/sdf.fs b/sdf.fs
index f15ca98..6d707df 100644
--- a/sdf.fs
+++ b/sdf.fs
@@ -4,6 +4,8 @@ R"###(
 out vec4 FragColor;
 in vec2 texCoords;
 
+uniform float aspect;
+
 vec3 center = vec3(0.0,0.0,20.0);
 float radius = 5.0;
 
@@ -89,6 +91,7 @@ vec3 calcNormal(Ray ray){
 void main()
 {
     vec3 dir = vec3((texCoords - 0.5)*2,1.0);
+    dir.x *= aspect;
     vec3 pos = dir;
     Ray ray = Ray(normalize(dir),pos,.0,.0,vec3(.0));
 
@@ -97,7 +100,7 @@ void main()
     vec3 normal = calcNormal(ray);
 
     vec3 lighDir = normalize(vec3(.5,-1.0,0.5));
-    float light = (- min(dot(normal,lighDir),0.0))*0.7+0.3;
+    float light = (- min(dot(normal,lighDir),0.0))*0.85+0.3;
 
     Ray shRay = Ray(lighDir * (-1.0), ray.pos + 0.5*normal , .0,.0, vec3(.0));
     shRay = march(shRay);