yay procedural sky!

client/main.cpp

@@ -133,7 +133,7 @@ class Game {
 
 public:
 	Game() {
-		InitWindow(1280, 720, "Multiplayer Terrain Game");
+		InitWindow(1280, 720, "Game");
 		SetTargetFPS(60);
 
 		// Initialize sky after window is created

client/shaders/sky.fs

@@ -0,0 +1,65 @@
+#version 330
+
+// Input vertex attributes (from vertex shader)
+in vec3 fragPosition;
+in vec2 fragTexCoord;
+in vec4 fragColor;
+in vec3 fragNormal;
+in vec3 worldPos;
+
+// Input uniform values
+uniform sampler2D texture0;
+uniform vec4 colDiffuse;
+
+// Custom uniforms for sky
+uniform vec3 horizonColor;
+uniform vec3 zenithColor;
+uniform vec3 sunDirection;
+uniform vec3 sunColor;
+uniform float sunIntensity;
+
+// Output fragment color
+out vec4 finalColor;
+
+void main()
+{
+    // Normalize the world position to get direction from center
+    vec3 direction = normalize(worldPos);
+    
+    // Calculate gradient based on Y component (height)
+    float gradientFactor = smoothstep(-0.5, 1.0, direction.y);
+    
+    // Interpolate between horizon and zenith colors
+    vec3 skyColor = mix(horizonColor, zenithColor, gradientFactor);
+    
+    // Calculate sun contribution
+    vec3 sunDir = normalize(sunDirection);
+    float sunDot = dot(direction, sunDir);
+    
+    // Sun rendering
+    vec3 color = skyColor;
+    
+    // Only render sun if it's above horizon and has intensity
+    if (sunDir.y > 0.0 && sunIntensity > 0.1) {
+        // Sun disc with soft edges
+        float sunSize = 0.99; // Smaller value = larger sun
+        float sunEdge = 0.98;
+        
+        if (sunDot > sunSize) {
+            // Bright sun core
+            color = mix(sunColor, vec3(1.0, 1.0, 0.95), 0.8);
+        } else if (sunDot > sunEdge) {
+            // Soft edge
+            float edge = smoothstep(sunEdge, sunSize, sunDot);
+            color = mix(skyColor, sunColor, edge);
+        }
+        
+        // Sun glow
+        if (sunDot > 0.85) {
+            float glow = pow(max(0.0, (sunDot - 0.85) / 0.15), 2.0) * sunIntensity;
+            color = mix(color, sunColor, glow * 0.5);
+        }
+    }
+    
+    finalColor = vec4(color, 1.0);
+}

client/shaders/sky.vs

@@ -0,0 +1,34 @@
+#version 330
+
+// Input vertex attributes
+in vec3 vertexPosition;
+in vec2 vertexTexCoord;
+in vec3 vertexNormal;
+in vec4 vertexColor;
+
+// Input uniform values
+uniform mat4 mvp;
+uniform mat4 matModel;
+uniform mat4 matNormal;
+
+// Output vertex attributes (to fragment shader)
+out vec3 fragPosition;
+out vec2 fragTexCoord;
+out vec4 fragColor;
+out vec3 fragNormal;
+out vec3 worldPos;
+
+void main()
+{
+    // Send vertex attributes to fragment shader
+    fragPosition = vec3(matModel * vec4(vertexPosition, 1.0));
+    fragTexCoord = vertexTexCoord;
+    fragColor = vertexColor;
+    fragNormal = normalize(vec3(matNormal * vec4(vertexNormal, 0.0)));
+    
+    // Store world position for sky calculations
+    worldPos = vertexPosition;
+    
+    // Calculate final vertex position
+    gl_Position = mvp * vec4(vertexPosition, 1.0);
+}

client/sky/Sky.cpp

@@ -2,6 +2,7 @@
 #include <rlgl.h>
 #include <cmath>
 #include <algorithm>
+#include <iostream>
 
 Sky::Sky() 
     : fogDensity(0.01f)
@@ -14,8 +15,28 @@ Sky::Sky()
     createSkyDome();
     updateColors();
     
-    // Try to load a custom shader if available
-    // For now we'll use basic rendering
+    // Try to load the sky shader
+    const char* vsPath = "shaders/sky.vs";
+    const char* fsPath = "shaders/sky.fs";
+    
+    if (FileExists(vsPath) && FileExists(fsPath)) {
+        skyShader = LoadShader(vsPath, fsPath);
+        
+        // Get shader uniform locations
+        horizonColorLoc = GetShaderLocation(skyShader, "horizonColor");
+        zenithColorLoc = GetShaderLocation(skyShader, "zenithColor");
+        sunDirectionLoc = GetShaderLocation(skyShader, "sunDirection");
+        sunColorLoc = GetShaderLocation(skyShader, "sunColor");
+        sunIntensityLoc = GetShaderLocation(skyShader, "sunIntensity");
+        
+        // Assign shader to sky model
+        skyModel.materials[0].shader = skyShader;
+        
+        shaderLoaded = true;
+        std::cout << "Sky shader loaded successfully\n";
+    } else {
+        std::cout << "Sky shader files not found, using fallback rendering\n";
+    }
 }
 
 Sky::~Sky() {
@@ -26,17 +47,11 @@ Sky::~Sky() {
 }
 
 void Sky::createSkyDome() {
-    // Create a large inverted sphere for the sky dome
-    // The sphere is inverted so we see the inside surface
-    skyDome = GenMeshSphere(1000.0f, 32, 32);
+    // Create a large sphere for the sky dome
+    skyDome = GenMeshSphere(500.0f, 16, 16);
     
-    // Invert the mesh normals to render the inside
-    for (int i = 0; i < skyDome.vertexCount * 3; i++) {
-        skyDome.normals[i] *= -1.0f;
-    }
-    
-    // Update mesh in GPU
-    UploadMesh(&skyDome, false);
+    // Don't invert normals - let's use backface culling instead
+    // Just upload the mesh as-is
     skyModel = LoadModelFromMesh(skyDome);
 }
 
@@ -162,38 +177,58 @@ void Sky::renderSkybox(const Camera3D& camera) {
     // Disable depth write but keep depth test for proper rendering order
     rlDisableDepthMask();
     
+    // Disable backface culling so we can see the inside of the sphere
+    rlDisableBackfaceCulling();
+    
     // Position skybox at camera position so it moves with the camera
     // This ensures the skybox is always centered on the viewer
     rlTranslatef(camera.position.x, camera.position.y, camera.position.z);
     
-    // Draw the sky dome with gradient color
-    // We'll use vertex colors or a simple colored material
-    Color topColor = zenithColor;
-    Color bottomColor = horizonColor;
+    if (shaderLoaded) {
+        // First make sure sun position is updated
+        sun.updatePosition(timeOfDay);
         
-    // For now, draw with a blended color
-    Color skyColor = interpolateColor(bottomColor, topColor, 0.5f);
-    DrawModel(skyModel, {0, 0, 0}, 1.0f, skyColor);
+        // Update shader uniforms
+        Vector3 horizonColorVec = {
+            horizonColor.r / 255.0f,
+            horizonColor.g / 255.0f,
+            horizonColor.b / 255.0f
+        };
+        Vector3 zenithColorVec = {
+            zenithColor.r / 255.0f,
+            zenithColor.g / 255.0f,
+            zenithColor.b / 255.0f
+        };
+        Vector3 sunColorVec = {
+            sun.color.r / 255.0f,
+            sun.color.g / 255.0f,
+            sun.color.b / 255.0f
+        };
         
-    // Draw sun as a sphere on the skybox
-    if (sun.intensity > 0.2f && sun.position.y > 0) {
-        // Calculate sun direction from camera
-        Vector3 sunDir = Vector3Normalize(sun.position);
-        Vector3 sunPosOnSphere = Vector3Scale(sunDir, 900.0f); // Just inside the skybox
+        // Normalize sun direction (make sure it's valid)
+        Vector3 sunDir = {0, 1, 0}; // Default up if sun position is invalid
+        if (Vector3Length(sun.position) > 0.001f) {
+            sunDir = Vector3Normalize(sun.position);
+        }
         
-        // Draw sun as a sphere
-        DrawSphere(sunPosOnSphere, 50.0f, sun.color);
 
-        // Draw sun glow layers
-        Color glowColor = sun.color;
-        glowColor.a = 80;
-        DrawSphere(sunPosOnSphere, 70.0f, glowColor);
+        // Set shader uniforms
+        SetShaderValue(skyShader, horizonColorLoc, &horizonColorVec, SHADER_UNIFORM_VEC3);
+        SetShaderValue(skyShader, zenithColorLoc, &zenithColorVec, SHADER_UNIFORM_VEC3);
+        SetShaderValue(skyShader, sunDirectionLoc, &sunDir, SHADER_UNIFORM_VEC3);
+        SetShaderValue(skyShader, sunColorLoc, &sunColorVec, SHADER_UNIFORM_VEC3);
+        SetShaderValue(skyShader, sunIntensityLoc, &sun.intensity, SHADER_UNIFORM_FLOAT);
         
-        glowColor.a = 40;
-        DrawSphere(sunPosOnSphere, 90.0f, glowColor);
+        // Draw the sky dome with shader
+        DrawModel(skyModel, {0, 0, 0}, 1.0f, WHITE);
+    } else {
+        // Fallback: Draw without shader
+        Color skyColor = interpolateColor(horizonColor, zenithColor, 0.5f);
+        DrawModel(skyModel, {0, 0, 0}, 1.0f, skyColor);
     }
     
     // Restore depth state
+    rlEnableBackfaceCulling();
     rlEnableDepthMask();
     rlPopMatrix();
 }

client/sky/Sky.hpp

@@ -2,7 +2,6 @@
 
 #include <raylib.h>
 #include <raymath.h>
-#include <vector>
 
 class Sky {
 private:
@@ -29,6 +28,13 @@ private:
     Model skyModel;
     bool shaderLoaded;
 
+    // Shader locations
+    int horizonColorLoc;
+    int zenithColorLoc;
+    int sunDirectionLoc;
+    int sunColorLoc;
+    int sunIntensityLoc;
+
 public:
     Sky();
     ~Sky();