init

projekt_linux/assets/shaders/lava_particle_fragment_shader.glsl

@@ -0,0 +1,56 @@
+#version 330 core
+
+in vec4 vColor;
+in vec2 vLocal;
+in vec4 vShape;
+in float vHeightFactor;
+out vec4 FragColor;
+
+float hash12(vec2 p) {
+    vec3 p3 = fract(vec3(p.xyx) * 0.1031);
+    p3 += dot(p3, p3.yzx + 33.33);
+    return fract((p3.x + p3.y) * p3.z);
+}
+
+void main() {
+    float c = cos(vShape.z);
+    float s = sin(vShape.z);
+    mat2 rot = mat2(c, -s, s, c);
+    vec2 p = rot * vLocal;
+    p /= max(vShape.xy, vec2(0.3));
+
+    float angle = atan(p.y, p.x);
+    float radius = length(p);
+    float wave = 1.0 + vShape.w * (0.45 * sin(3.0 * angle) + 0.35 * cos(5.0 * angle));
+    float envelope = radius / max(wave, 0.35);
+    if (envelope > 1.0) {
+        discard;
+    }
+
+    float shell = smoothstep(1.0, 0.06, envelope);
+    float core = smoothstep(0.66, 0.0, envelope);
+    float edge = smoothstep(0.98, 0.55, envelope) * (1.0 - core);
+
+    float noise1 = hash12(p * 6.0 + vec2(vShape.w * 13.7, vShape.z));
+    float noise2 = hash12(p * 11.0 + vec2(vShape.z * 0.3, vShape.w * 19.1));
+    float densityNoise = mix(noise1, noise2, 0.5);
+    float density = mix(0.70, 1.18, densityNoise);
+
+    vec3 lightDir = normalize(vec3(-0.35, 0.68, 0.64));
+    vec3 normal = normalize(vec3(p * 0.9, sqrt(max(0.0, 1.0 - clamp(envelope * envelope, 0.0, 1.0)))));
+    float diff = max(dot(normal, lightDir), 0.0);
+
+    float ashLift = mix(0.92, 1.10, vHeightFactor);
+    vec3 smokeLit = vColor.rgb * (0.52 + 0.30 * diff) * ashLift;
+    vec3 emberTint = vec3(0.95, 0.40, 0.08) * core * (1.0 - vHeightFactor) * 0.35;
+    vec3 rimCool = vec3(0.10, 0.11, 0.12) * edge * 0.30;
+
+    float alpha = vColor.a * shell * density;
+    alpha *= mix(1.05, 0.70, vHeightFactor);
+    alpha = clamp(alpha, 0.0, 1.0);
+    if (alpha < 0.01) {
+        discard;
+    }
+
+    FragColor = vec4(smokeLit + emberTint - rimCool, alpha);
+}

projekt_linux/assets/shaders/lava_particle_vertex_shader.glsl

@@ -0,0 +1,38 @@
+#version 330 core
+
+layout (location = 0) in vec2 aCorner;
+layout (location = 1) in vec3 aCenter;
+layout (location = 2) in vec3 aRight;
+layout (location = 3) in vec3 aUp;
+layout (location = 4) in float aHalfSize;
+layout (location = 5) in vec4 aColor;
+layout (location = 6) in vec4 aShape;
+
+out vec4 vColor;
+out vec2 vLocal;
+out vec4 vShape;
+out float vHeightFactor;
+
+uniform mat4 view;
+uniform mat4 projection;
+uniform float uTime;
+
+void main() {
+    float cornerTop = clamp((aCorner.y + 1.0) * 0.5, 0.0, 1.0);
+    float heightFactor = clamp(aCenter.y * 0.055, 0.0, 1.0);
+
+    float swayA = sin(uTime * 0.48 + aCenter.y * 0.16 + aShape.w * 13.0);
+    float swayB = cos(uTime * 0.37 + aCenter.x * 0.09 + aShape.w * 19.0);
+    float shear = (0.06 + 0.28 * heightFactor) * cornerTop;
+
+    vec3 dynamicOffset = aRight * (swayA * shear * aHalfSize) +
+                         aUp * (swayB * 0.08 * shear * aHalfSize);
+
+    vec3 worldPos = aCenter + aRight * (aCorner.x * aHalfSize) + aUp * (aCorner.y * aHalfSize) + dynamicOffset;
+    gl_Position = projection * view * vec4(worldPos, 1.0);
+
+    vColor = aColor;
+    vLocal = aCorner;
+    vShape = aShape;
+    vHeightFactor = heightFactor;
+}

projekt_linux/assets/shaders/ocean_fragment_shader.glsl

@@ -0,0 +1,54 @@
+#version 330 core
+// Fragment Shader for Ocean Rendering with Texture Normals
+
+in vec3 NormalInterp; // **IN variable declaration - crucial!**
+
+// Input from Vertex Shader
+in vec2 TexCoord;
+in vec3 FragPosWorld;
+in vec3 NormalWorld;
+
+// Output fragment color
+out vec4 FragColor;
+
+// Uniforms (textures, lighting parameters, camera position)
+uniform sampler2D oceanTexture;    // Sampler for ocean color texture
+uniform sampler2D normalMap;       // Sampler for normal map texture
+uniform vec3 lightDir;          // Directional light direction (world space)
+uniform vec3 lightColor;        // Light color
+uniform vec3 viewPosWorld;      // Camera position in world space
+
+void main() {
+    // 1. Sample textures
+    vec3 albedoColor = texture(oceanTexture, TexCoord).rgb; // Sample ocean color texture
+    //vec3 normalMapSample = texture(normalMap, TexCoord).rgb; // Sample normal map
+
+    // 2. Unpack and transform normal from normal map (Tangent Space to World Space - Simplified)
+    //vec3 normalMapNormal = normalize(normalMapSample * 2.0 - 1.0); // Unpack from [0, 1] to [-1, 1] and normalize
+    vec3 normalWorld = normalize(NormalInterp); // Get interpolated geometric normal from vertex shader
+
+    // **Basic Tangent Space Normal Mapping Approximation:**
+    // For truly correct tangent-space normal mapping, you'd need to construct a proper TBN matrix.
+    vec3 finalNormal = normalize(normalWorld ); // **Blend/Perturb geometric normal with texture normal**
+
+
+    // 3. Lighting calculations (Blinn-Phong example)
+    vec3 lightDirNorm = normalize(lightDir);
+    vec3 viewDirNorm = normalize(viewPosWorld - FragPosWorld);
+    vec3 reflectDir = reflect(-lightDirNorm, finalNormal);
+
+    // Diffuse component
+    float diff = max(dot(finalNormal, lightDirNorm), 0.0);
+    vec3 diffuse = diff * lightColor * albedoColor;
+
+    // Specular component (Blinn-Phong)
+    float spec = pow(max(dot(viewDirNorm, reflectDir), 0.0), 32.0);
+    vec3 specular = spec * lightColor * vec3(0.8); // Example specular color
+
+    // Ambient component
+    vec3 ambient = 0.3 * lightColor * albedoColor; // Example ambient
+
+    // 4. Combine lighting components for final color
+    vec3 finalColor = ambient + diffuse + specular;
+    FragColor = vec4(finalColor, 1.0); // Output final fragment color
+}

projekt_linux/assets/shaders/ocean_vertex_shader.glsl

@@ -0,0 +1,34 @@
+#version 330 core
+// Vertex Shader for Ocean Rendering
+
+// Input vertex attributes (from VBOs)
+layout (location = 0) in vec3 aPos;      // Vertex position (from Ocean::vertices VBO)
+layout (location = 1) in vec3 aNormal;   // Vertex normal (from Ocean::normals VBO)
+layout (location = 2) in vec2 aTexCoord; // Texture coordinates (from Ocean::texCoords VBO)
+
+// Output to Fragment Shader
+out vec2 TexCoord;
+out vec3 FragPosWorld;     // Fragment position in world space
+out vec3 NormalWorld;      // Normal vector in world space
+
+out vec3 NormalInterp; // **OUT variable declaration - crucial!**
+
+// Uniforms (matrices, light parameters, etc.)
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+uniform mat3 normalMatrix; // Normal matrix for correct normal transformation
+
+void main() {
+    // 1. Transform vertex position to clip space
+    gl_Position = projection * view  * vec4(aPos, 1.0);
+
+    // 2. Pass texture coordinates to fragment shader
+    TexCoord = aTexCoord;
+
+    // 3. Calculate fragment position in world space
+    FragPosWorld = vec3(model * vec4(aPos, 1.0));
+
+    // 4. Transform normal vector to world space using the Normal Matrix
+    NormalWorld = normalize(normalMatrix * aNormal);
+}

projekt_linux/assets/shaders/terrain_fragment_shader.glsl

@@ -0,0 +1,61 @@
+#version 330 core
+// Fragment Shader for Terrain Rendering
+
+in vec2 TexCoord;
+in vec3 FragPosWorld;
+in vec3 NormalWorld;
+
+out vec4 FragColor;
+
+uniform sampler2D terrainTexture; // Sampler for terrain color texture (no normal map for now)
+uniform sampler2D heightMapTexture; // **New: Sampler for heightmap texture**
+
+uniform vec3 lightDir;
+uniform vec3 lightColor;
+uniform vec3 viewPosWorld;
+uniform vec3 volcanoCenterWorld;
+uniform float volcanoRadius;
+uniform float volcanoHeat;
+
+void main() {
+    // 1. Sample textures
+    vec3 albedoColor = texture(terrainTexture, TexCoord * 8.0).rgb;
+    float heightValue = texture(heightMapTexture, TexCoord).r;
+
+    // 2. Lighting calculations (Blinn-Phong - similar to ocean shader)
+    vec3 normal = normalize(NormalWorld); // Use geometric normal for terrain
+    vec3 lightDirNorm = normalize(lightDir);
+    vec3 viewDirNorm = normalize(viewPosWorld - FragPosWorld);
+    vec3 reflectDir = reflect(-lightDirNorm, normal);
+
+    // Diffuse component
+    float diff = max(dot(normal, lightDirNorm), 0.0);
+    vec3 diffuse = diff * lightColor * albedoColor;
+
+    // Specular component
+    float spec = pow(max(dot(viewDirNorm, reflectDir), 0.0), 16.0); // Adjust shininess (exponent)
+    vec3 specular = spec * lightColor * vec3(0.3); // Example specular color - less shiny than ocean
+
+    // Ambient component
+    vec3 ambient = 0.2 * lightColor * albedoColor;
+
+    vec3 lowColor = vec3(0.78, 0.73, 0.64);
+    vec3 highColor = vec3(0.42, 0.36, 0.30);
+    vec3 heightTint = mix(lowColor, highColor, heightValue);
+
+
+    // 4. Combine lighting components for final color
+    vec3 litTerrain = (ambient + diffuse + specular) * albedoColor * heightTint;
+
+    float distToVolcano = length(FragPosWorld.xz - volcanoCenterWorld.xz);
+    float heightFromVolcanoBase = max(FragPosWorld.y - volcanoCenterWorld.y, 0.0);
+    float coneHeightMask = smoothstep(1.5, 8.0, heightFromVolcanoBase);
+    float lavaMask = 1.0 - smoothstep(volcanoRadius * 0.15, volcanoRadius, distToVolcano);
+    lavaMask = pow(clamp(lavaMask, 0.0, 1.0), 2.4);
+    lavaMask *= coneHeightMask;
+    lavaMask *= clamp(volcanoHeat, 0.0, 1.0);
+
+    vec3 lavaColor = mix(vec3(0.95, 0.18, 0.03), vec3(1.0, 0.75, 0.2), heightValue);
+    vec3 finalColor = mix(litTerrain, litTerrain * 0.78 + lavaColor * 0.72, lavaMask);
+    FragColor = vec4(finalColor, 1.0);
+}

projekt_linux/assets/shaders/terrain_vertex_shader.glsl

@@ -0,0 +1,22 @@
+#version 330 core
+// Vertex Shader for Terrain Rendering
+
+layout (location = 0) in vec3 aPos;      // Vertex position
+layout (location = 1) in vec3 aNormal;   // Vertex normal
+layout (location = 2) in vec2 aTexCoord; // Texture coordinates
+
+out vec2 TexCoord;
+out vec3 FragPosWorld;
+out vec3 NormalWorld;
+
+uniform mat4 model;
+uniform mat4 view;
+uniform mat4 projection;
+uniform mat3 normalMatrix;
+
+void main() {
+    gl_Position = projection * view  * vec4(aPos, 1.0);
+    TexCoord = aTexCoord;
+    FragPosWorld = vec3(model * vec4(aPos, 1.0));
+    NormalWorld = normalize(normalMatrix * aNormal);
+}