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Moved culling, updated lights and shadows into a prepare function so it is only called once for stereo rendering

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This commit is contained in:
Bastiaan Olij 2018-06-11 21:51:30 +10:00
parent e5b876e92a
commit 3fc9b5d93f
2 changed files with 91 additions and 13 deletions
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99
servers/visual/visual_server_scene.cpp
View file

@ -1674,7 +1674,8 @@ void VisualServerScene::render_camera(RID p_camera, RID p_scenario, Size2 p_view
} break;
}
_render_scene(camera->transform, camera_matrix, ortho, camera->env, camera->visible_layers, p_scenario, p_shadow_atlas, RID(), -1);
_prepare_scene(camera->transform, camera_matrix, ortho, camera->env, camera->visible_layers, p_scenario, p_shadow_atlas, RID());
_render_scene(camera->transform, camera_matrix, ortho, camera->env, p_scenario, p_shadow_atlas, RID(), -1);
}
void VisualServerScene::render_camera(Ref<ARVRInterface> &p_interface, ARVRInterface::Eyes p_eye, RID p_camera, RID p_scenario, Size2 p_viewport_size, RID p_shadow_atlas) {
@ -1684,7 +1685,6 @@ void VisualServerScene::render_camera(Ref<ARVRInterface> &p_interface, ARVRInter
ERR_FAIL_COND(!camera);
/* SETUP CAMERA, we are ignoring type and FOV here */
bool ortho = false;
float aspect = p_viewport_size.width / (float)p_viewport_size.height;
CameraMatrix camera_matrix = p_interface->get_projection_for_eye(p_eye, aspect, camera->znear, camera->zfar);
@ -1693,10 +1693,79 @@ void VisualServerScene::render_camera(Ref<ARVRInterface> &p_interface, ARVRInter
Transform world_origin = ARVRServer::get_singleton()->get_world_origin();
Transform cam_transform = p_interface->get_transform_for_eye(p_eye, world_origin);
_render_scene(cam_transform, camera_matrix, ortho, camera->env, camera->visible_layers, p_scenario, p_shadow_atlas, RID(), -1);
// For stereo render we only prepare for our left eye and then reuse the outcome for our right eye
if (p_eye == ARVRInterface::EYE_LEFT) {
///@TODO possibly move responsibility for this into our ARVRServer or ARVRInterface?
// Center our transform, we assume basis is equal.
Transform mono_transform = cam_transform;
Transform right_transform = p_interface->get_transform_for_eye(ARVRInterface::EYE_RIGHT, world_origin);
mono_transform.origin += right_transform.origin;
mono_transform.origin *= 0.5;
// We need to combine our projection frustums for culling.
// Ideally we should use our clipping planes for this and combine them,
// however our shadow map logic uses our projection matrix.
// Note: as our left and right frustums should be mirrored, we don't need our right projection matrix.
// - get some base values we need
float eye_dist = (mono_transform.origin - cam_transform.origin).length();
float z_near = camera_matrix.get_z_near(); // get our near plane
float z_far = camera_matrix.get_z_far(); // get our far plane
float width = (2.0 * z_near) / camera_matrix.matrix[0][0];
float x_shift = width * camera_matrix.matrix[2][0];
float height = (2.0 * z_near) / camera_matrix.matrix[1][1];
float y_shift = width * camera_matrix.matrix[2][1];
// printf("Eye_dist = %f, Near = %f, Far = %f, Width = %f, Shift = %f\n", eye_dist, z_near, z_far, width, x_shift);
// - calculate our near plane size (horizontal only, right_near is mirrored)
float left_near = -eye_dist - ((width - x_shift) * 0.5);
// - calculate our far plane size (horizontal only, right_far is mirrored)
float left_far = -eye_dist - (z_far * (width - x_shift) * 0.5 / z_near);
float left_far_right_eye = eye_dist - (z_far * (width + x_shift) * 0.5 / z_near);
if (left_far > left_far_right_eye) {
// on displays smaller then double our iod, the right eye far frustrum can overtake the left eyes.
left_far = left_far_right_eye;
}
// - figure out required z-shift
float slope = (left_far - left_near) / (z_far - z_near);
float z_shift = (left_near / slope) - z_near;
// - figure out new vertical near plane size (this will be slightly oversized thanks to our z-shift)
float top_near = (height + y_shift) * 0.5;
top_near += y_shift * z_shift;
float bottom_near = -(height - y_shift) * 0.5;
bottom_near -= y_shift * z_shift;
// printf("Left_near = %f, Left_far = %f, Top_near = %f, Bottom_near = %f, Z_shift = %f\n", left_near, left_far, top_near, bottom_near, z_shift);
// - generate our frustum
CameraMatrix combined_matrix;
combined_matrix.set_frustum(left_near, -left_near, bottom_near, top_near, z_near + z_shift, z_far + z_shift);
// and finally move our camera back
Transform apply_z_shift;
apply_z_shift.origin = Vector3(0.0, 0.0, z_shift); // z negative is forward so this moves it backwards
mono_transform *= apply_z_shift;
// now prepare our scene with our adjusted transform projection matrix
_prepare_scene(mono_transform, combined_matrix, false, camera->env, camera->visible_layers, p_scenario, p_shadow_atlas, RID());
} else if (p_eye == ARVRInterface::EYE_MONO) {
// For mono render, prepare as per usual
_prepare_scene(cam_transform, camera_matrix, false, camera->env, camera->visible_layers, p_scenario, p_shadow_atlas, RID());
}
// And render our scene...
_render_scene(cam_transform, camera_matrix, false, camera->env, p_scenario, p_shadow_atlas, RID(), -1);
};
void VisualServerScene::_render_scene(const Transform p_cam_transform, const CameraMatrix &p_cam_projection, bool p_cam_orthogonal, RID p_force_environment, uint32_t p_visible_layers, RID p_scenario, RID p_shadow_atlas, RID p_reflection_probe, int p_reflection_probe_pass) {
void VisualServerScene::_prepare_scene(const Transform p_cam_transform, const CameraMatrix &p_cam_projection, bool p_cam_orthogonal, RID p_force_environment, uint32_t p_visible_layers, RID p_scenario, RID p_shadow_atlas, RID p_reflection_probe) {
// Note, in stereo rendering:
// - p_cam_transform will be a transform in the middle of our two eyes
// - p_cam_projection is a wider frustrum that encompasses both eyes
Scenario *scenario = scenario_owner.getornull(p_scenario);
@ -1713,7 +1782,7 @@ void VisualServerScene::_render_scene(const Transform p_cam_transform, const Cam
float z_far = p_cam_projection.get_z_far();
/* STEP 2 - CULL */
int cull_count = scenario->octree.cull_convex(planes, instance_cull_result, MAX_INSTANCE_CULL);
instance_cull_count = scenario->octree.cull_convex(planes, instance_cull_result, MAX_INSTANCE_CULL);
light_cull_count = 0;
reflection_probe_cull_count = 0;
@ -1731,7 +1800,7 @@ void VisualServerScene::_render_scene(const Transform p_cam_transform, const Cam
/* STEP 4 - REMOVE FURTHER CULLED OBJECTS, ADD LIGHTS */
for (int i = 0; i < cull_count; i++) {
for (int i = 0; i < instance_cull_count; i++) {
Instance *ins = instance_cull_result[i];
@ -1857,8 +1926,8 @@ void VisualServerScene::_render_scene(const Transform p_cam_transform, const Cam
if (!keep) {
// remove, no reason to keep
cull_count--;
SWAP(instance_cull_result[i], instance_cull_result[cull_count]);
instance_cull_count--;
SWAP(instance_cull_result[i], instance_cull_result[instance_cull_count]);
i--;
ins->last_render_pass = 0; // make invalid
} else {
@ -1870,7 +1939,7 @@ void VisualServerScene::_render_scene(const Transform p_cam_transform, const Cam
/* STEP 5 - PROCESS LIGHTS */
RID *directional_light_ptr = &light_instance_cull_result[light_cull_count];
int directional_light_count = 0;
directional_light_count = 0;
// directional lights
{
@ -2007,6 +2076,11 @@ void VisualServerScene::_render_scene(const Transform p_cam_transform, const Cam
}
}
}
}
void VisualServerScene::_render_scene(const Transform p_cam_transform, const CameraMatrix &p_cam_projection, bool p_cam_orthogonal, RID p_force_environment, RID p_scenario, RID p_shadow_atlas, RID p_reflection_probe, int p_reflection_probe_pass) {
Scenario *scenario = scenario_owner.getornull(p_scenario);
/* ENVIRONMENT */
@ -2018,9 +2092,9 @@ void VisualServerScene::_render_scene(const Transform p_cam_transform, const Cam
else
environment = scenario->fallback_environment;
/* STEP 6 - PROCESS GEOMETRY AND DRAW SCENE*/
/* PROCESS GEOMETRY AND DRAW SCENE */
VSG::scene_render->render_scene(p_cam_transform, p_cam_projection, p_cam_orthogonal, (RasterizerScene::InstanceBase **)instance_cull_result, cull_count, light_instance_cull_result, light_cull_count + directional_light_count, reflection_probe_instance_cull_result, reflection_probe_cull_count, environment, p_shadow_atlas, scenario->reflection_atlas, p_reflection_probe, p_reflection_probe_pass);
VSG::scene_render->render_scene(p_cam_transform, p_cam_projection, p_cam_orthogonal, (RasterizerScene::InstanceBase **)instance_cull_result, instance_cull_count, light_instance_cull_result, light_cull_count + directional_light_count, reflection_probe_instance_cull_result, reflection_probe_cull_count, environment, p_shadow_atlas, scenario->reflection_atlas, p_reflection_probe, p_reflection_probe_pass);
}
void VisualServerScene::render_empty_scene(RID p_scenario, RID p_shadow_atlas) {
@ -2093,7 +2167,8 @@ bool VisualServerScene::_render_reflection_probe_step(Instance *p_instance, int
shadow_atlas = scenario->reflection_probe_shadow_atlas;
}
_render_scene(xform, cm, false, RID(), VSG::storage->reflection_probe_get_cull_mask(p_instance->base), p_instance->scenario->self, shadow_atlas, reflection_probe->instance, p_step);
_prepare_scene(xform, cm, false, RID(), VSG::storage->reflection_probe_get_cull_mask(p_instance->base), p_instance->scenario->self, shadow_atlas, reflection_probe->instance);
_render_scene(xform, cm, false, RID(), p_instance->scenario->self, shadow_atlas, reflection_probe->instance, p_step);
} else {
//do roughness postprocess step until it believes it's done

5
servers/visual/visual_server_scene.h
View file

@ -434,11 +434,13 @@ public:
}
};
int instance_cull_count;
Instance *instance_cull_result[MAX_INSTANCE_CULL];
Instance *instance_shadow_cull_result[MAX_INSTANCE_CULL]; //used for generating shadowmaps
Instance *light_cull_result[MAX_LIGHTS_CULLED];
RID light_instance_cull_result[MAX_LIGHTS_CULLED];
int light_cull_count;
int directional_light_count;
RID reflection_probe_instance_cull_result[MAX_REFLECTION_PROBES_CULLED];
int reflection_probe_cull_count;
@ -483,7 +485,8 @@ public:
_FORCE_INLINE_ void _light_instance_update_shadow(Instance *p_instance, const Transform p_cam_transform, const CameraMatrix &p_cam_projection, bool p_cam_orthogonal, RID p_shadow_atlas, Scenario *p_scenario);
void _render_scene(const Transform p_cam_transform, const CameraMatrix &p_cam_projection, bool p_cam_orthogonal, RID p_force_environment, uint32_t p_visible_layers, RID p_scenario, RID p_shadow_atlas, RID p_reflection_probe, int p_reflection_probe_pass);
void _prepare_scene(const Transform p_cam_transform, const CameraMatrix &p_cam_projection, bool p_cam_orthogonal, RID p_force_environment, uint32_t p_visible_layers, RID p_scenario, RID p_shadow_atlas, RID p_reflection_probe);
void _render_scene(const Transform p_cam_transform, const CameraMatrix &p_cam_projection, bool p_cam_orthogonal, RID p_force_environment, RID p_scenario, RID p_shadow_atlas, RID p_reflection_probe, int p_reflection_probe_pass);
void render_empty_scene(RID p_scenario, RID p_shadow_atlas);
void render_camera(RID p_camera, RID p_scenario, Size2 p_viewport_size, RID p_shadow_atlas);