Code simplifications found by cppcheck

They are based on:
- Boolean arithmetic simplifications
- setting variables that are not accessed
- constant variables

editor/animation_bezier_editor.cpp

@@ -944,9 +944,7 @@ void AnimationBezierTrackEdit::gui_input(const Ref<InputEvent> &p_event) {
 				Vector2 popup_pos = get_screen_position() + mb->get_position();
 
 				menu->clear();
-				if (!locked_tracks.has(selected_track) || locked_tracks.has(selected_track)) {
-					menu->add_icon_item(bezier_icon, TTR("Insert Key Here"), MENU_KEY_INSERT);
-				}
+				menu->add_icon_item(bezier_icon, TTR("Insert Key Here"), MENU_KEY_INSERT);
 				if (selection.size()) {
 					menu->add_separator();
 					menu->add_icon_item(get_theme_icon(SNAME("Duplicate"), SNAME("EditorIcons")), TTR("Duplicate Selected Key(s)"), MENU_KEY_DUPLICATE);

editor/import/audio_stream_import_settings.cpp

@@ -288,17 +288,15 @@ void AudioStreamImportSettings::_draw_indicator() {
 		float preview_len = zoom_bar->get_page();
 		float beat_size = 60 / float(stream->get_bpm());
 		int prev_beat = 0;
-		int last_text_end_x = 0;
 		for (int i = 0; i < rect.size.width; i++) {
 			float ofs = preview_offset + i * preview_len / rect.size.width;
 			int beat = int(ofs / beat_size);
 			if (beat != prev_beat) {
 				String text = itos(beat);
 				int text_w = beat_font->get_string_size(text).width;
-				if (i - text_w / 2 > last_text_end_x + 2 * EDSCALE && beat == _hovering_beat) {
+				if (i - text_w / 2 > 2 * EDSCALE && beat == _hovering_beat) {
 					int x_ofs = i - text_w / 2;
 					_indicator->draw_string(beat_font, Point2(x_ofs, 2 * EDSCALE + beat_font->get_ascent(main_size)), text, HORIZONTAL_ALIGNMENT_LEFT, rect.size.width - x_ofs, Font::DEFAULT_FONT_SIZE, color);
-					last_text_end_x = i + text_w / 2;
 					break;
 				}
 				prev_beat = beat;

editor/plugins/bone_map_editor_plugin.cpp

@@ -742,7 +742,6 @@ void BoneMapper::auto_mapping_process(Ref<BoneMap> &p_bone_map) {
 		} else {
 			p_bone_map->_set_skeleton_bone_name("LeftEye", skeleton->get_bone_name(bone_idx));
 		}
-		bone_idx = -1;
 
 		bone_idx = search_bone_by_name(skeleton, picklist, BONE_SEGREGATION_RIGHT, neck_or_head);
 		if (bone_idx == -1) {
@@ -750,7 +749,6 @@ void BoneMapper::auto_mapping_process(Ref<BoneMap> &p_bone_map) {
 		} else {
 			p_bone_map->_set_skeleton_bone_name("RightEye", skeleton->get_bone_name(bone_idx));
 		}
-		bone_idx = -1;
 		picklist.clear();
 
 		// 4-2. Guess Jaw

editor/plugins/tiles/tile_data_editors.cpp

@@ -2481,9 +2481,6 @@ void TileDataTerrainsEditor::forward_painting_alternatives_gui_input(TileAtlasVi
 
 						if (terrain_set == -1 || !tile_data || tile_data->get_terrain_set() != terrain_set) {
 							// Paint terrain sets.
-							if (mb->get_button_index() == MouseButton::RIGHT) {
-								terrain_set = -1;
-							}
 							drag_type = DRAG_TYPE_PAINT_TERRAIN_SET;
 							drag_modified.clear();
 							drag_painted_value = int(dummy_object->get("terrain_set"));

modules/mbedtls/packet_peer_mbed_dtls.cpp

@@ -118,7 +118,6 @@ Error PacketPeerMbedDTLS::connect_to_peer(Ref<PacketPeerUDP> p_base, bool p_vali
 	ERR_FAIL_COND_V(!p_base.is_valid() || !p_base->is_socket_connected(), ERR_INVALID_PARAMETER);
 
 	base = p_base;
-	int ret = 0;
 	int authmode = p_validate_certs ? MBEDTLS_SSL_VERIFY_REQUIRED : MBEDTLS_SSL_VERIFY_NONE;
 
 	Error err = tls_ctx->init_client(MBEDTLS_SSL_TRANSPORT_DATAGRAM, authmode, p_ca_certs);
@@ -130,7 +129,7 @@ Error PacketPeerMbedDTLS::connect_to_peer(Ref<PacketPeerUDP> p_base, bool p_vali
 
 	status = STATUS_HANDSHAKING;
 
-	if ((ret = _do_handshake()) != OK) {
+	if (_do_handshake() != OK) {
 		status = STATUS_ERROR_HOSTNAME_MISMATCH;
 		return FAILED;
 	}
@@ -158,7 +157,7 @@ Error PacketPeerMbedDTLS::accept_peer(Ref<PacketPeerUDP> p_base, Ref<CryptoKey>
 
 	status = STATUS_HANDSHAKING;
 
-	if ((ret = _do_handshake()) != OK) {
+	if (_do_handshake() != OK) {
 		status = STATUS_ERROR;
 		return FAILED;
 	}
@@ -175,7 +174,7 @@ Error PacketPeerMbedDTLS::put_packet(const uint8_t *p_buffer, int p_bytes) {
 
 	int ret = mbedtls_ssl_write(tls_ctx->get_context(), p_buffer, p_bytes);
 	if (ret == MBEDTLS_ERR_SSL_WANT_READ || ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
-		ret = 0; // non blocking io
+		// Non blocking io.
 	} else if (ret <= 0) {
 		TLSContextMbedTLS::print_mbedtls_error(ret);
 		_cleanup();

modules/openxr/extensions/openxr_htc_vive_tracker_extension.cpp

@@ -91,8 +91,6 @@ bool OpenXRHTCViveTrackerExtension::is_path_supported(const String &p_path) {
 		return available;
 	} else if (p_path == "/user/vive_tracker_htcx/role/chest") {
 		return available;
-	} else if (p_path == "/user/vive_tracker_htcx/role/chest") {
-		return available;
 	} else if (p_path == "/user/vive_tracker_htcx/role/camera") {
 		return available;
 	} else if (p_path == "/user/vive_tracker_htcx/role/keyboard") {

modules/vorbis/audio_stream_ogg_vorbis.cpp

@@ -438,9 +438,7 @@ void AudioStreamOggVorbis::maybe_update_info() {
 		}
 		if (i == 0) {
 			packet->b_o_s = 1;
-		}
 
-		if (i == 0) {
 			ERR_FAIL_COND(!vorbis_synthesis_idheader(packet));
 		}
 

scene/gui/color_picker.cpp

@@ -959,7 +959,7 @@ void ColorPicker::_sample_draw() {
 		// Draw both old and new colors for easier comparison (only if spawned from a ColorPickerButton).
 		const Rect2 rect_old = Rect2(Point2(), Size2(sample->get_size().width * 0.5, sample->get_size().height * 0.95));
 
-		if (display_old_color && old_color.a < 1.0) {
+		if (old_color.a < 1.0) {
 			sample->draw_texture_rect(get_theme_icon(SNAME("sample_bg"), SNAME("ColorPicker")), rect_old, true);
 		}
 

scene/gui/split_container.cpp

@@ -71,7 +71,7 @@ void SplitContainerDragger::gui_input(const Ref<InputEvent> &p_event) {
 
 		Vector2i in_parent_pos = get_transform().xform(mm->get_position());
 		if (!sc->vertical && is_layout_rtl()) {
-			sc->split_offset = drag_ofs - ((sc->vertical ? in_parent_pos.y : in_parent_pos.x) - drag_from);
+			sc->split_offset = drag_ofs - (in_parent_pos.x - drag_from);
 		} else {
 			sc->split_offset = drag_ofs + ((sc->vertical ? in_parent_pos.y : in_parent_pos.x) - drag_from);
 		}
@@ -194,7 +194,6 @@ void SplitContainer::_compute_middle_sep(bool p_clamp) {
 	// Clamp the split_offset if requested.
 	if (p_clamp) {
 		split_offset -= wished_middle_sep - middle_sep;
-		p_clamp = false;
 	}
 }
 

scene/gui/tab_bar.cpp

@@ -385,9 +385,6 @@ void TabBar::_notification(int p_what) {
 					if (tabs[i].disabled) {
 						sb = theme_cache.tab_disabled_style;
 						col = theme_cache.font_disabled_color;
-					} else if (i == current) {
-						sb = theme_cache.tab_selected_style;
-						col = theme_cache.font_selected_color;
 					} else {
 						sb = theme_cache.tab_unselected_style;
 						col = theme_cache.font_unselected_color;

scene/resources/animation.cpp

@@ -2464,7 +2464,6 @@ T Animation::_interpolate(const Vector<TKey<T>> &p_keys, double p_time, Interpol
 
 	ERR_FAIL_COND_V(idx == -2, T());
 
-	bool result = true;
 	int next = 0;
 	real_t c = 0.0;
 	// prepare for all cases of interpolation
@@ -2596,10 +2595,7 @@ T Animation::_interpolate(const Vector<TKey<T>> &p_keys, double p_time, Interpol
 	}
 
 	if (p_ok) {
-		*p_ok = result;
-	}
-	if (!result) {
-		return T();
+		*p_ok = true;
 	}
 
 	real_t tr = p_keys[idx].transition;

servers/physics_3d/godot_soft_body_3d.cpp

@@ -1011,7 +1011,6 @@ void GodotSoftBody3D::predict_motion(real_t p_delta) {
 						} break;
 						case PhysicsServer3D::AREA_SPACE_OVERRIDE_REPLACE:
 						case PhysicsServer3D::AREA_SPACE_OVERRIDE_REPLACE_COMBINE: {
-							gravity = Vector3(0, 0, 0);
 							gravity = area_gravity;
 							gravity_done = area_gravity_mode == PhysicsServer3D::AREA_SPACE_OVERRIDE_REPLACE;
 						} break;

servers/rendering/renderer_rd/effects/ss_effects.cpp

@@ -1332,7 +1332,6 @@ void SSEffects::generate_ssao(SSAORenderBuffers &p_ssao_buffers, RID p_normal_bu
 		for (int pass = 0; pass < blur_passes; pass++) {
 			int blur_pipeline = SSAO_BLUR_PASS;
 			if (ssao_quality > RS::ENV_SSAO_QUALITY_VERY_LOW) {
-				blur_pipeline = SSAO_BLUR_PASS_SMART;
 				if (pass < blur_passes - 2) {
 					blur_pipeline = SSAO_BLUR_PASS_WIDE;
 				} else {

servers/rendering/renderer_rd/renderer_canvas_render_rd.cpp

@@ -796,7 +796,6 @@ void RendererCanvasRenderRD::_render_item(RD::DrawListID p_draw_list, RID p_rend
 
 					RenderingServerDefault::redraw_request(); // active particles means redraw request
 
-					bool local_coords = true;
 					int dpc = particles_storage->particles_get_draw_passes(pt->particles);
 					if (dpc == 0) {
 						break; //nothing to draw
@@ -818,12 +817,7 @@ void RendererCanvasRenderRD::_render_item(RD::DrawListID p_draw_list, RID p_rend
 
 					if (particles_storage->particles_has_collision(pt->particles) && texture_storage->render_target_is_sdf_enabled(p_render_target)) {
 						//pass collision information
-						Transform2D xform;
-						if (local_coords) {
-							xform = p_item->final_transform;
-						} else {
-							xform = p_canvas_transform_inverse;
-						}
+						Transform2D xform = p_item->final_transform;
 
 						RID sdf_texture = texture_storage->render_target_get_sdf_texture(p_render_target);
 

servers/rendering/shader_language.cpp

@@ -7590,7 +7590,7 @@ Error ShaderLanguage::_parse_block(BlockNode *p_block, const FunctionInfo &p_fun
 				return ERR_BUG;
 			}
 
-			if (b && b->parent_function && p_function_info.main_function) {
+			if (b->parent_function && p_function_info.main_function) {
 				_set_error(vformat(RTR("Using '%s' in the '%s' processor function is incorrect."), "return", b->parent_function->name));
 				return ERR_PARSE_ERROR;
 			}
@@ -8880,7 +8880,7 @@ Error ShaderLanguage::_parse_shader(const HashMap<StringName, FunctionInfo> &p_f
 							_set_error(RTR("Expected an uniform group identifier or `;`."));
 						}
 						return ERR_PARSE_ERROR;
-					} else if (tk.type == TK_SEMICOLON && current_uniform_group_name.is_empty()) {
+					} else if (current_uniform_group_name.is_empty()) {
 						_set_error(RTR("Group needs to be opened before."));
 						return ERR_PARSE_ERROR;
 					} else {