trivial.cl

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#include "utils.cl"
#include "types.cl"
#include "sdf.cl"
 
#ifndef BENCHMARK
 
#define CAMERA_POSITIONS_LENGTH 1
#define CAMERA_POSITIONS_ARRAY { (float4)(15, -5, 0, 0) }
#define CAMERA_FACING_DIRECTIONS_LENGTH 1
#define CAMERA_FACING_DIRECTIONS_ARRAY { (float4)(normalise((float3)(1, 0, 0)), 0.0f) }
 
#define DO_SOFT_SHADOWS true
 
#endif
 
// Debug
#define DO_RENDER_SURFACE_NORMALS true
#define DO_RENDER_MARCHING_ITERATIONS false
#define DISPLAY_BOUNDING_VOLUME false
 
#define SCENE_BACKGROUND_COLOUR (float3)(0.1f, 0.1f, 0.1f)
 
#define SURFACE_INTERSECTION_EPSILON 0.00001f
#define MAXIMUM_MARCH_STEPS 300
#define MAXIMUM_MARCH_DISTANCE 100
#define SURFACE_SHADOW_FALLOFF 5.0f
 
Light getLight(float time)
{
    float t = fmod(time * 0.75f, 2.0f * PI);
 
    Light light;
    light.ambient = (float3)(0.1f, 0.1f, 0.1f);
    light.diffuse = (float3)(0.6f, 0.6f, 0.6f);
    light.specular = (float3)(1.0f, 1.0f, 1.0f);
    light.position = (float3)(25 * cos(t), -25, 25 * sin(t));
 
    return light;
}
 
Material SDF(float3 position, float time, float * distance)
{
    float offset = -sin(time * 0.5f) * 1.5f;
    float dist_sphere = sphereSDF(position, (float3)(0.0f, offset - 5.0f, 0.0f), 1.0f);
    float dist_plane = f_abs(position.y);
 
    Material material;
 
    if (dist_sphere < dist_plane)
    {
        *distance = dist_sphere;
 
        material.ambient = (float3)(0.9f, 0.9f, 0.9f);
        material.diffuse = material.ambient;
        material.specular = (float3)(0.5f, 0.5f, 0.5f);
        material.shininess = 25.0f;
    }
    else
    {
        *distance = dist_plane;
 
        material.ambient = (float3)(0.92f, 0.30f, 0.16f);
        material.diffuse = material.ambient;
        material.specular = (float3)(0.0f, 0.0f, 0.0f);
        material.shininess = 100.0f;
    }
 
    return material;
}
 
Material getMaterial(float3 position, float time)
{
    float distance;
    return SDF(position, time, &distance);
}
 
float DE(float3 position, float time)
{
    float distance;
    SDF(position, time, &distance);
    return distance;
}
 
#include "main.cl"