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Support light size and soft shadows

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This commit is contained in:
Juan Linietsky 2020-04-09 15:11:15 -03:00
parent 26ecd924cc
commit 6a730ffeab
12 changed files with 520 additions and 54 deletions
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41
servers/rendering/rendering_server_scene.cpp
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@ -1499,7 +1499,9 @@ bool RenderingServerScene::_light_instance_update_shadow(Instance *p_instance, c
if (j == 0 || d_z > z_max)
z_max = d_z;
}
real_t radius = 0;
real_t soft_shadow_expand = 0;
Vector3 center;
{
@ -1528,12 +1530,30 @@ bool RenderingServerScene::_light_instance_update_shadow(Instance *p_instance, c
bias_scale = radius / first_radius;
}
x_max_cam = x_vec.dot(center) + radius;
x_min_cam = x_vec.dot(center) - radius;
y_max_cam = y_vec.dot(center) + radius;
y_min_cam = y_vec.dot(center) - radius;
z_min_cam = z_vec.dot(center) - radius;
{
float soft_shadow_angle = RSG::storage->light_get_param(p_instance->base, RS::LIGHT_PARAM_SIZE);
if (soft_shadow_angle > 0.0 && pancake_size > 0.0) {
float z_range = (z_vec.dot(center) + radius + pancake_size) - z_min_cam;
soft_shadow_expand = Math::tan(Math::deg2rad(soft_shadow_angle)) * z_range;
x_max += soft_shadow_expand;
y_max += soft_shadow_expand;
x_min -= soft_shadow_expand;
y_min -= soft_shadow_expand;
}
}
x_max_cam = x_vec.dot(center) + radius + soft_shadow_expand;
x_min_cam = x_vec.dot(center) - radius - soft_shadow_expand;
y_max_cam = y_vec.dot(center) + radius + soft_shadow_expand;
y_min_cam = y_vec.dot(center) - radius - soft_shadow_expand;
if (depth_range_mode == RS::LIGHT_DIRECTIONAL_SHADOW_DEPTH_RANGE_STABLE) {
//this trick here is what stabilizes the shadow (make potential jaggies to not move)
//at the cost of some wasted resolution. Still the quality increase is very well worth it
@ -1588,8 +1608,9 @@ bool RenderingServerScene::_light_instance_update_shadow(Instance *p_instance, c
}
}
if (cull_max > z_max)
if (cull_max > z_max) {
z_max = cull_max;
}
if (pancake_size > 0) {
z_max = z_vec.dot(center) + radius + pancake_size;
@ -1677,11 +1698,19 @@ bool RenderingServerScene::_light_instance_update_shadow(Instance *p_instance, c
ortho_camera.set_orthogonal(-half_x, half_x, -half_y, half_y, 0, (z_max - z_min_cam));
Vector2 uv_scale(1.0 / (x_max_cam - x_min_cam), 1.0 / (y_max_cam - y_min_cam));
Transform ortho_transform;
ortho_transform.basis = transform.basis;
ortho_transform.origin = x_vec * (x_min_cam + half_x) + y_vec * (y_min_cam + half_y) + z_vec * z_max;
RSG::scene_render->light_instance_set_shadow_transform(light->instance, ortho_camera, ortho_transform, z_max - z_min_cam, distances[i + 1], i, radius * 2.0 / texture_size, bias_scale * aspect_bias_scale * min_distance_bias_scale);
{
Vector3 max_in_view = p_cam_transform.affine_inverse().xform(z_vec * cull_max);
Vector3 dir_in_view = p_cam_transform.xform_inv(z_vec).normalized();
cull_max = dir_in_view.dot(max_in_view);
}
RSG::scene_render->light_instance_set_shadow_transform(light->instance, ortho_camera, ortho_transform, z_max - z_min_cam, distances[i + 1], i, radius * 2.0 / texture_size, bias_scale * aspect_bias_scale * min_distance_bias_scale, z_max, uv_scale);
}
RSG::scene_render->render_shadow(light->instance, p_shadow_atlas, i, (RasterizerScene::InstanceBase **)instance_shadow_cull_result, cull_count);