void LightsourceSimplePass::find_lights(const GraphicContextPtr &gc, SceneImpl *scene)
{
lights.clear();
Size viewport_size = inout.viewport.size();
Mat4f eye_to_projection = Mat4f::perspective(inout.field_of_view, viewport_size.width/(float)viewport_size.height, 0.1f, 1.e10f, handed_left, gc->clip_z_range());
Mat4f eye_to_cull_projection = Mat4f::perspective(inout.field_of_view, viewport_size.width/(float)viewport_size.height, 0.1f, 150.0f, handed_left, clip_negative_positive_w);
FrustumPlanes frustum(eye_to_cull_projection * inout.world_to_eye);
scene->foreach_light(frustum, [&](SceneLightImpl *light)
{
if ((light->type() == SceneLight::type_omni || light->type() == SceneLight::type_spot) && light->light_caster() && lights.size() < max_lights - 1)
{
lights.push_back(light);
}
});
}
void LightsourceSimplePass::upload(const GraphicContextPtr &gc, SceneImpl *scene)
{
ScopeTimeFunction();
Size viewport_size = inout.viewport.size();
Mat4f eye_to_projection = Mat4f::perspective(inout.field_of_view, viewport_size.width/(float)viewport_size.height, 0.1f, 1.e4f, handed_left, gc->clip_z_range());
float aspect = inout.viewport.width()/(float)inout.viewport.height();
float field_of_view_y_degrees = inout.field_of_view;
float field_of_view_y_rad = (float)(field_of_view_y_degrees * PI / 180.0);
float f = 1.0f / tan(field_of_view_y_rad * 0.5f);
float rcp_f = 1.0f / f;
float rcp_f_div_aspect = 1.0f / (f / aspect);
Vec2f two_rcp_viewport_size(2.0f / inout.viewport.width(), 2.0f / inout.viewport.height());
Uniforms cpu_uniforms;
cpu_uniforms.eye_to_projection = eye_to_projection;
cpu_uniforms.object_to_eye = Quaternionf::inverse(scene->camera()->orientation()).to_matrix();
cpu_uniforms.rcp_f = rcp_f;
cpu_uniforms.rcp_f_div_aspect = rcp_f_div_aspect;
cpu_uniforms.two_rcp_viewport_size = two_rcp_viewport_size;
uniforms.upload_data(gc, &cpu_uniforms, 1);
int num_lights = lights.size();
Mat4f normal_world_to_eye = Mat4f(Mat3f(inout.world_to_eye)); // This assumes uniform scale
Mat4f eye_to_world = Mat4f::inverse(inout.world_to_eye);
Vec4f *instance_data = light_instance_transfer->data<Vec4f>();
for (int i = 0; i < num_lights; i++)
{
float radius = lights[i]->attenuation_end();
if (lights[i]->rectangle_shape())
radius *= 1.414213562373f;
float attenuation_delta = lights[i]->attenuation_end() - lights[i]->attenuation_start();
if (attenuation_delta == 0.0f)
attenuation_delta = 1e-6f;
float sqr_radius = radius * radius;
#ifdef USE_QUADRATIC_ATTENUATION
float sqr_attenuation_start = lights[i]->attenuation_start * lights[i]->attenuation_start;
float sqr_attenuation_delta = attenuation_delta * attenuation_delta;
#else
float attenuation_start = lights[i]->attenuation_start();
#endif
float sqr_falloff_begin = 0.0f;
float light_type = 0.0f;
if (lights[i]->type() == SceneLight::type_spot)
{
light_type = lights[i]->rectangle_shape() ? 2.0f : 1.0f;
float falloff_begin = lights[i]->hotspot() / lights[i]->falloff();
sqr_falloff_begin = falloff_begin * falloff_begin;
}
Vec3f position_in_eye = Vec3f(inout.world_to_eye * Vec4f(lights[i]->position(), 1.0f));
Mat4f eye_to_shadow_projection = lights[i]->vsm_data->world_to_shadow_projection * eye_to_world;
int shadow_map_index = lights[i]->vsm_data->shadow_map.get_index();
instance_data[i * vectors_per_light + 0] = Vec4f(position_in_eye, (float)shadow_map_index);
instance_data[i * vectors_per_light + 1] = Vec4f(lights[i]->color(), lights[i]->ambient_illumination());
#ifdef USE_QUADRATIC_ATTENUATION
instance_data[i * vectors_per_light + 2] = Vec4f(sqr_radius, sqr_attenuation_start, 1.0f / sqr_attenuation_delta, sqr_falloff_begin);
#else
instance_data[i * vectors_per_light + 2] = Vec4f(sqr_radius, attenuation_start, 1.0f / attenuation_delta, sqr_falloff_begin);
#endif
instance_data[i * vectors_per_light + 3] = Vec4f(eye_to_shadow_projection[0], eye_to_shadow_projection[4], eye_to_shadow_projection[8], light_type);
instance_data[i * vectors_per_light + 4] = Vec4f(eye_to_shadow_projection[1], eye_to_shadow_projection[5], eye_to_shadow_projection[9], 0.0f);
instance_data[i * vectors_per_light + 5] = Vec4f(eye_to_shadow_projection[2], eye_to_shadow_projection[6], eye_to_shadow_projection[10], 0.0f);
}
instance_data[num_lights * vectors_per_light + 0] = Vec4f(0.0f);
instance_data[num_lights * vectors_per_light + 1] = Vec4f(0.0f);
instance_data[num_lights * vectors_per_light + 2] = Vec4f(0.0f);
instance_data[num_lights * vectors_per_light + 3] = Vec4f(0.0f);
instance_data[num_lights * vectors_per_light + 4] = Vec4f(0.0f);
instance_data[num_lights * vectors_per_light + 5] = Vec4f(0.0f);
light_instance_texture->set_image(gc, light_instance_transfer);
}
void LightsourcePass::find_lights(const GraphicContextPtr &gc, SceneImpl *scene)
{
lights.clear();
Size viewport_size = inout.viewport.size();
Mat4f eye_to_projection = Mat4f::perspective(inout.field_of_view, viewport_size.width/(float)viewport_size.height, 0.1f, 1.e10f, handed_left, gc->clip_z_range());
Mat4f eye_to_cull_projection = Mat4f::perspective(inout.field_of_view, viewport_size.width/(float)viewport_size.height, 0.1f, 150.0f, handed_left, clip_negative_positive_w);
FrustumPlanes frustum(eye_to_cull_projection * inout.world_to_eye);
scene->foreach_light(frustum, [&](SceneLightImpl *light)
{
if ((light->type() == SceneLight::type_omni || light->type() == SceneLight::type_spot) && light->light_caster() && lights.size() < max_lights - 1)
{
#ifdef TEST_LIGHT_DISTANCE
float dist = (world_to_eye * Vec4f(light->position, 1.0f)).length3() - light->attenuation_end;
if (dist < 30.0f)
lights.push_back(light);
#else
lights.push_back(light);
#endif
}
});
}