diff options
Diffstat (limited to 'scene/3d/light_3d.cpp')
| -rw-r--r-- | scene/3d/light_3d.cpp | 83 |
1 files changed, 80 insertions, 3 deletions
diff --git a/scene/3d/light_3d.cpp b/scene/3d/light_3d.cpp index 66f4fa2bcc..e51f06e083 100644 --- a/scene/3d/light_3d.cpp +++ b/scene/3d/light_3d.cpp @@ -28,6 +28,8 @@ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ +#include "core/config/project_settings.h" + #include "light_3d.h" void Light3D::set_param(Param p_param, real_t p_value) { @@ -122,7 +124,14 @@ uint32_t Light3D::get_cull_mask() const { void Light3D::set_color(const Color &p_color) { color = p_color; - RS::get_singleton()->light_set_color(light, p_color); + + if (GLOBAL_GET("rendering/lights_and_shadows/use_physical_light_units")) { + Color combined = color.srgb_to_linear(); + combined *= correlated_color.srgb_to_linear(); + RS::get_singleton()->light_set_color(light, combined.linear_to_srgb()); + } else { + RS::get_singleton()->light_set_color(light, color); + } // The gizmo color depends on the light color, so update it. update_gizmos(); } @@ -181,6 +190,56 @@ void Light3D::owner_changed_notify() { _update_visibility(); } +// Temperature expressed in Kelvins. Valid range 1000 - 15000 +// First converts to CIE 1960 then to sRGB +// As explained in the Filament documentation: https://google.github.io/filament/Filament.md.html#lighting/directlighting/lightsparameterization +Color _color_from_temperature(float p_temperature) { + float T2 = p_temperature * p_temperature; + float u = (0.860117757f + 1.54118254e-4f * p_temperature + 1.28641212e-7f * T2) / + (1.0f + 8.42420235e-4f * p_temperature + 7.08145163e-7f * T2); + float v = (0.317398726f + 4.22806245e-5f * p_temperature + 4.20481691e-8f * T2) / + (1.0f - 2.89741816e-5f * p_temperature + 1.61456053e-7f * T2); + + // Convert to xyY space. + float d = 1.0f / (2.0f * u - 8.0f * v + 4.0f); + float x = 3.0f * u * d; + float y = 2.0f * v * d; + + // Convert to XYZ space + const float a = 1.0 / MAX(y, 1e-5f); + Vector3 xyz = Vector3(x * a, 1.0, (1.0f - x - y) * a); + + // Convert from XYZ to sRGB(linear) + Vector3 linear = Vector3(3.2404542f * xyz.x - 1.5371385f * xyz.y - 0.4985314f * xyz.z, + -0.9692660f * xyz.x + 1.8760108f * xyz.y + 0.0415560f * xyz.z, + 0.0556434f * xyz.x - 0.2040259f * xyz.y + 1.0572252f * xyz.z); + linear /= MAX(1e-5f, linear[linear.max_axis_index()]); + // Normalize, clamp, and convert to sRGB. + return Color(linear.x, linear.y, linear.z).clamp().linear_to_srgb(); +} + +void Light3D::set_temperature(const float p_temperature) { + temperature = p_temperature; + if (!GLOBAL_GET("rendering/lights_and_shadows/use_physical_light_units")) { + return; + } + correlated_color = _color_from_temperature(temperature); + + Color combined = color.srgb_to_linear() * correlated_color.srgb_to_linear(); + + RS::get_singleton()->light_set_color(light, combined.linear_to_srgb()); + // The gizmo color depends on the light color, so update it. + update_gizmos(); +} + +Color Light3D::get_correlated_color() const { + return correlated_color; +} + +float Light3D::get_temperature() const { + return temperature; +} + void Light3D::_update_visibility() { if (!is_inside_tree()) { return; @@ -228,8 +287,14 @@ void Light3D::_validate_property(PropertyInfo &p_property) const { p_property.usage = PROPERTY_USAGE_NO_EDITOR; } - if (get_light_type() != RS::LIGHT_DIRECTIONAL && p_property.name == "light_angular_distance") { - // Angular distance is only used in DirectionalLight3D. + if (get_light_type() != RS::LIGHT_DIRECTIONAL && (p_property.name == "light_angular_distance" || p_property.name == "light_intensity_lux")) { + // Angular distance and Light Intensity Lux are only used in DirectionalLight3D. + p_property.usage = PROPERTY_USAGE_NONE; + } else if (get_light_type() == RS::LIGHT_DIRECTIONAL && p_property.name == "light_intensity_lumens") { + p_property.usage = PROPERTY_USAGE_NONE; + } + + if (!GLOBAL_GET("rendering/lights_and_shadows/use_physical_light_units") && (p_property.name == "light_intensity_lumens" || p_property.name == "light_intensity_lux" || p_property.name == "light_temperature")) { p_property.usage = PROPERTY_USAGE_NONE; } @@ -278,7 +343,14 @@ void Light3D::_bind_methods() { ClassDB::bind_method(D_METHOD("set_projector", "projector"), &Light3D::set_projector); ClassDB::bind_method(D_METHOD("get_projector"), &Light3D::get_projector); + ClassDB::bind_method(D_METHOD("set_temperature", "temperature"), &Light3D::set_temperature); + ClassDB::bind_method(D_METHOD("get_temperature"), &Light3D::get_temperature); + ClassDB::bind_method(D_METHOD("get_correlated_color"), &Light3D::get_correlated_color); + ADD_GROUP("Light", "light_"); + ADD_PROPERTYI(PropertyInfo(Variant::FLOAT, "light_intensity_lumens", PROPERTY_HINT_RANGE, "0,100000.0,0.01,or_greater,suffix:lm"), "set_param", "get_param", PARAM_INTENSITY); + ADD_PROPERTYI(PropertyInfo(Variant::FLOAT, "light_intensity_lux", PROPERTY_HINT_RANGE, "0,150000.0,0.01,or_greater,suffix:lx"), "set_param", "get_param", PARAM_INTENSITY); + ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "light_temperature", PROPERTY_HINT_RANGE, "1000,15000.0,1.0,suffix:k"), "set_temperature", "get_temperature"); ADD_PROPERTY(PropertyInfo(Variant::COLOR, "light_color", PROPERTY_HINT_COLOR_NO_ALPHA), "set_color", "get_color"); ADD_PROPERTYI(PropertyInfo(Variant::FLOAT, "light_energy", PROPERTY_HINT_RANGE, "0,16,0.001,or_greater"), "set_param", "get_param", PARAM_ENERGY); ADD_PROPERTYI(PropertyInfo(Variant::FLOAT, "light_indirect_energy", PROPERTY_HINT_RANGE, "0,16,0.001,or_greater"), "set_param", "get_param", PARAM_INDIRECT_ENERGY); @@ -331,6 +403,7 @@ void Light3D::_bind_methods() { BIND_ENUM_CONSTANT(PARAM_SHADOW_OPACITY); BIND_ENUM_CONSTANT(PARAM_SHADOW_BLUR); BIND_ENUM_CONSTANT(PARAM_TRANSMITTANCE_BIAS); + BIND_ENUM_CONSTANT(PARAM_INTENSITY); BIND_ENUM_CONSTANT(PARAM_MAX); BIND_ENUM_CONSTANT(BAKE_DISABLED); @@ -382,6 +455,9 @@ Light3D::Light3D(RenderingServer::LightType p_type) { set_param(PARAM_SHADOW_NORMAL_BIAS, 1.0); set_param(PARAM_TRANSMITTANCE_BIAS, 0.05); set_param(PARAM_SHADOW_FADE_START, 1); + // For OmniLight3D and SpotLight3D, specified in Lumens. + set_param(PARAM_INTENSITY, 1000.0); + set_temperature(6500.0); // Nearly white. set_disable_scale(true); } @@ -487,6 +563,7 @@ DirectionalLight3D::DirectionalLight3D() : set_param(PARAM_SHADOW_FADE_START, 0.8); // Increase the default shadow bias to better suit most scenes. set_param(PARAM_SHADOW_BIAS, 0.1); + set_param(PARAM_INTENSITY, 100000.0); // Specified in Lux, approximate mid-day sun. set_shadow_mode(SHADOW_PARALLEL_4_SPLITS); blend_splits = false; set_sky_mode(SKY_MODE_LIGHT_AND_SKY); |