Page MenuHome
Differential D8091 Diff 26169 intern/cycles/kernel/svm/svm_sky.h

Changeset View

Standalone View

View Options

intern/cycles/kernel/svm/svm_sky.h

Show First 20 Lines • Show All 130 Lines • ▼ Show 20 Linesccl_device float3 sky_radiance_nishita(KernelGlobals *kg,
float3 dir, float3 dir,
float *nishita_data, float *nishita_data,
uint texture_id) uint texture_id)
{ {
/* definitions */ /* definitions */
float sun_elevation = nishita_data[6]; float sun_elevation = nishita_data[6];
float sun_rotation = nishita_data[7]; float sun_rotation = nishita_data[7];
float angular_diameter = nishita_data[8]; float angular_diameter = nishita_data[8];
float sun_intensity = nishita_data[9];
bool sun_disc = (angular_diameter > 0.0f); bool sun_disc = (angular_diameter > 0.0f);
float3 xyz; float3 xyz;
/* convert dir to spherical coordinates */ /* convert dir to spherical coordinates */
float2 direction = direction_to_spherical(dir); float2 direction = direction_to_spherical(dir);
/* render above the horizon */ /* render above the horizon */
if (dir.z >= 0.0f) { if (dir.z >= 0.0f) {
/* definitions */ /* definitions */
float3 sun_dir = geographical_to_direction(sun_elevation, sun_rotation + M_PI_2_F); float3 sun_dir = geographical_to_direction(sun_elevation, sun_rotation + M_PI_2_F);
float sun_dir_angle = acos(dot(dir, sun_dir)); float sun_dir_angle = acos(dot(dir, sun_dir));
float half_angular = angular_diameter / 2.0f; float half_angular = angular_diameter / 2.0f;
float dir_elevation = M_PI_2_F - direction.x; float dir_elevation = M_PI_2_F - direction.x;
/* if ray inside sun disc render it, otherwise render sky */ /* if ray inside sun disc render it, otherwise render sky */
if (sun_disc && sun_dir_angle < half_angular) { if (sun_disc && sun_dir_angle < half_angular) {
/* get 3 pixels data */ /* get 2 pixels data */
float3 pixel_bottom = make_float3(nishita_data[0], nishita_data[1], nishita_data[2]); float3 pixel_bottom = make_float3(nishita_data[0], nishita_data[1], nishita_data[2]);
float3 pixel_top = make_float3(nishita_data[3], nishita_data[4], nishita_data[5]); float3 pixel_top = make_float3(nishita_data[3], nishita_data[4], nishita_data[5]);
float y; float y;
/* sun interpolation */ /* sun interpolation */
if (sun_elevation - half_angular > 0.0f) { if (sun_elevation - half_angular > 0.0f) {
if (sun_elevation + half_angular > 0.0f) { if (sun_elevation + half_angular > 0.0f) {
y = ((dir_elevation - sun_elevation) / angular_diameter) + 0.5f; y = ((dir_elevation - sun_elevation) / angular_diameter) + 0.5f;
xyz = interp(pixel_bottom, pixel_top, y); xyz = interp(pixel_bottom, pixel_top, y) * sun_intensity;
} }
} }
else { else {
if (sun_elevation + half_angular > 0.0f) { if (sun_elevation + half_angular > 0.0f) {
y = dir_elevation / (sun_elevation + half_angular); y = dir_elevation / (sun_elevation + half_angular);
xyz = interp(pixel_bottom, pixel_top, y); xyz = interp(pixel_bottom, pixel_top, y) * sun_intensity;
} }
} }
/* limb darkening, coefficient is 0.6f */ /* limb darkening, coefficient is 0.6f */
float limb_darkening = (1.0f - float limb_darkening = (1.0f -
0.6f * (1.0f - sqrtf(1.0f - sqr(sun_dir_angle / half_angular)))); 0.6f * (1.0f - sqrtf(1.0f - sqr(sun_dir_angle / half_angular))));
xyz *= limb_darkening; xyz *= limb_darkening;
} }
/* sky */ /* sky */
else { else {
/* sky interpolation */ /* sky interpolation */
float x = (direction.y + M_PI_F + sun_rotation) / M_2PI_F; float x = (direction.y + M_PI_F + sun_rotation) / M_2PI_F;
float y = dir_elevation / M_PI_2_F; /* more pixels toward horizon compensation */
float y = powf((dir_elevation / M_PI_2_F), 0.5f);
lukasstockner97Unsubmitted
Done
Inline Actions
/* more pixels toward horizon compensation */
- float y = powf((dir_elevation / M_PI_2_F), 0.5f);
+ float y = safe_sqrtf(dir_elevation / M_PI_2_F);
if (x > 1.0f) {

Same here (safe_sqrtf outside of OSL).

lukasstockner97: Same here (safe_sqrtf outside of OSL).
if (x > 1.0f) { if (x > 1.0f) {
x -= 1.0f; x -= 1.0f;
} }
xyz = float4_to_float3(kernel_tex_image_interp(kg, texture_id, x, y)); xyz = float4_to_float3(kernel_tex_image_interp(kg, texture_id, x, y));
} }
} }
/* ground */ /* ground */
else { else {
▲ Show 20 Lines • Show All 106 Lines • ▼ Show 20 Lines else {
config_x, config_x,
config_y, config_y,
config_z); config_z);
} }
} }
/* Nishita */ /* Nishita */
else { else {
/* Define variables */ /* Define variables */
float nishita_data[9]; float nishita_data[10];
float4 data = read_node_float(kg, offset); float4 data = read_node_float(kg, offset);
nishita_data[0] = data.x; nishita_data[0] = data.x;
nishita_data[1] = data.y; nishita_data[1] = data.y;
nishita_data[2] = data.z; nishita_data[2] = data.z;
nishita_data[3] = data.w; nishita_data[3] = data.w;
data = read_node_float(kg, offset); data = read_node_float(kg, offset);
nishita_data[4] = data.x; nishita_data[4] = data.x;
nishita_data[5] = data.y; nishita_data[5] = data.y;
nishita_data[6] = data.z; nishita_data[6] = data.z;
nishita_data[7] = data.w; nishita_data[7] = data.w;
data = read_node_float(kg, offset); data = read_node_float(kg, offset);
nishita_data[8] = data.x; nishita_data[8] = data.x;
uint texture_id = __float_as_uint(data.y); nishita_data[9] = data.y;
uint texture_id = __float_as_uint(data.z);
/* Compute Sky */ /* Compute Sky */
f = sky_radiance_nishita(kg, dir, nishita_data, texture_id); f = sky_radiance_nishita(kg, dir, nishita_data, texture_id);
} }
stack_store_float3(stack, out_offset, f); stack_store_float3(stack, out_offset, f);
} }
CCL_NAMESPACE_END CCL_NAMESPACE_END