CLI Reference

Complete command-line options.

Usage

ray_tracer [options] -o <output_file>

General Options

Option	Default	Description
-o, --output <file>	output.ppm	Output file path
-w, --width <n>	800	Image width
-h, --height <n>	600	Image height
--scene <name>	demo	Preset scene name
-v, --verbose	off	Show detailed output

Render Mode

Option	Description
-p, --path-trace	Enable path tracing mode
-s, --samples <n>	Samples per pixel (path tracing)

Preset Scenes

Name	Description	Spheres
demo	Demo scene	10
cornell	Cornell Box	6
random	Random spheres	100

Examples

# Default Phong shading
ray_tracer -o phong.ppm

# 4K resolution
ray_tracer -w 3840 -h 2160 -o 4k.ppm

# Path tracing 128 samples
ray_tracer --scene cornell -p -s 128 -o cornell-128.ppm

# High quality path tracing
ray_tracer --scene cornell -p -s 512 -w 1920 -h 1080 -o high-quality.ppm

Performance Tuning

# With BVH acceleration (default)
ray_tracer --scene random -o fast.ppm

# Without BVH (for comparison testing)
ray_tracer --scene demo --no-bvh -o slow.ppm