client side path tracing

STATUS: READY (CLICK EXECUTE)
SAMPLES: 0

// --- RENDER ENGINE MODE ---
// 0 = Pure Ray Tracing (Sharp, instant, zero noise)
// 1 = Path Tracing (Photorealistic, soft global illumination)
#define RENDER_MODE 1

// --- ADJUSTABLE HINGE CONFIGURATION ---
// Change this value (in degrees) to swing open the door dynamically!
const float DOOR_ROTATION = 45.0;

// --- MATERIAL CODES ---
#define MAT_DIFFUSE    0
#define MAT_METAL      1
#define MAT_GLASS      2

// --- the envoirment ---
#define USE_CUSTOM_SKYBOX 1
const vec3 SKYBOX_COLOR = vec3(0.02, 0.03, 0.06);

// --- COLOR PALETTE PRESETS ---
const vec3 C_GOLD       = vec3(1.00, 0.78, 0.34);
const vec3 C_CHROME     = vec3(0.95, 0.95, 0.95);
const vec3 C_GLASS      = vec3(0.98, 1.00, 0.99);
const vec3 C_WOOD       = vec3(0.42, 0.26, 0.15);
const vec3 C_WALL       = vec3(0.85, 0.85, 0.82);

// --- PREFAB GEOMETRY FUNCTIONS!!!!!!!! ---
float sdSphere(vec3 p, vec3 center, float r) { return length(p - center) - r; }
float sdBox(vec3 p, vec3 center, vec3 b) { vec3 q = abs(p - center) - b; return length(max(q,0.0)) + min(max(q.x,max(q.y,q.z)),0.0); }

// Rotation helper function for the door hinge
vec3 rotateY(vec3 p, vec3 pivot, float angleDegrees) {
    float rad = radians(angleDegrees);
    float c = cos(rad); float s = sin(rad);
    vec3 local = p - pivot;
    return vec3(local.x * c - local.z * s, local.y, local.x * s + local.z * c) + pivot;
}

// --- Architectural Chamber Scene Graph ---
void mapScene(vec3 p, inout float minDist, inout Material hitMat) {
    
    // PREFAB 1: Architectural Matte Floor
    float dFloor = p.y - (-1.0);
    if(dFloor < minDist) {
        minDist = dFloor;
        float chk = mod(floor(p.x * 2.0) + floor(p.z * 2.0), 2.0);
        vec3 col = mix(vec3(0.15), vec3(0.75), chk);
        hitMat = Material(vec3(0.0), col, 0.35, MAT_DIFFUSE, 1.0);
    }
    
    // PREFAB 2: Back Accent Wall with Structural Archway Hole
    float dWall = sdBox(p, vec3(0.0, 1.5, 4.5), vec3(3.0, 2.5, 0.1));
    float dDoorCutout = sdBox(p, vec3(-0.8, 0.2, 4.5), vec3(0.6, 1.2, 0.5));
    float dWallWithArch = max(dWall, -dDoorCutout); // Construct hole subtraction
    if(dWallWithArch < minDist) {
        minDist = dWallWithArch;
        hitMat = Material(vec3(0.0), C_WALL, 0.5, MAT_DIFFUSE, 1.0);
    }

// PREFAB 3: HINGED DOOR (Rotates smoothly around its left edge coordinate)
    vec3 hingePivot = vec3(-1.4, 0.2, 4.5); 
    vec3 rotatedDoorPos = rotateY(p, hingePivot, -DOOR_ROTATION);
    float dDoor = sdBox(rotatedDoorPos, vec3(-0.8, 0.2, 4.5), vec3(0.58, 1.15, 0.04));
    if(dDoor < minDist) {
        minDist = dDoor;
        hitMat = Material(vec3(0.0), C_WOOD, 0.45, MAT_DIFFUSE, 1.0);
    }
    
    // PREFAB 4: Metallic Hinge Knob
    float dKnob = sdSphere(rotatedDoorPos, vec3(-0.35, 0.2, 4.56), 0.05);
    if(dKnob < minDist) {
        minDist = dKnob;
        hitMat = Material(vec3(0.0), C_GOLD, 0.05, MAT_METAL, 1.0);
    }

// PREFAB 5: Polished Chrome Foreground Art Piece
    float dArt = sdSphere(p, vec3(1.1, -0.4, 3.0), 0.6);
    if(dArt < minDist) {
        minDist = dArt;
        hitMat = Material(vec3(0.0), C_CHROME, 0.01, MAT_METAL, 1.0);
    }

// PREFAB 6: Decorative Heavy Crystal Glass Sphere
    float dGlass = sdSphere(p, vec3(0.0, -0.6, 2.2), 0.4);
    if(dGlass < minDist) {
        minDist = dGlass;
        hitMat = Material(vec3(0.0), C_GLASS, 0.0, MAT_GLASS, 1.6);
    }

// PREFAB 7: Studio Ceiling Softbox
    float dLight = sdBox(p, vec3(0.0, 4.5, 3.0), vec3(2.0, 0.1, 2.0));
    if(dLight < minDist) {
        minDist = dLight;
        hitMat = Material(vec3(14.0, 11.5, 9.0), vec3(0.0), 1.0, MAT_DIFFUSE, 1.0);
    }
}