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Show First 20 Lines • Show All 880 Lines • ▼ Show 20 Lines	ccl_device_inline float2 map_to_tube(const float3 co)
else {		else {
u = v = 0.0f;		u = v = 0.0f;
}		}
return make_float2(u, v);		return make_float2(u, v);
}		}

ccl_device_inline float2 map_to_sphere(const float3 co)		ccl_device_inline float2 map_to_sphere(const float3 co)
{		{
float l = len(co);		float l = dot(co, co);
float u, v;		float u, v;
if (l > 0.0f) {		if (l > 0.0f) {
if (UNLIKELY(co.x == 0.0f && co.y == 0.0f)) {		if (UNLIKELY(co.x == 0.0f && co.y == 0.0f)) {
u = 0.0f; /* Otherwise domain error. */		u = 0.0f; /* Otherwise domain error. */
}		}
else {		else {
u = (1.0f - atan2f(co.x, co.y) / M_PI_F) / 2.0f;		u = (0.5f - atan2f(co.x, co.y) * M_1_2PI_F);
}		}
v = 1.0f - safe_acosf(co.z / l) / M_PI_F;		v = 1.0f - safe_acosf(co.z / sqrtf(l)) * M_1_PI_F;
}		}
else {		else {
u = v = 0.0f;		u = v = 0.0f;
}		}
return make_float2(u, v);		return make_float2(u, v);
}		}

/* Compares two floats.		/* Compares two floats.
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