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a/animation/memory_and_smart_pointers/src/global.css b/animation/memory_and_smart_pointers/src/global.css new file mode 100644 index 0000000..201f5ff --- /dev/null +++ b/animation/memory_and_smart_pointers/src/global.css @@ -0,0 +1 @@ +@import url('https://fonts.googleapis.com/css2?family=Fira+Mono:wght@400;500;700&display=swap'); diff --git a/animation/memory_and_smart_pointers/src/motion-canvas.d.ts b/animation/memory_and_smart_pointers/src/motion-canvas.d.ts new file mode 100644 index 0000000..067c6a4 --- /dev/null +++ b/animation/memory_and_smart_pointers/src/motion-canvas.d.ts @@ -0,0 +1 @@ +/// diff --git a/animation/memory_and_smart_pointers/src/project.meta b/animation/memory_and_smart_pointers/src/project.meta new file mode 100644 index 0000000..68d1eac --- /dev/null +++ b/animation/memory_and_smart_pointers/src/project.meta @@ -0,0 +1,31 @@ +{ + "version": 0, + "shared": { + "background": "rgb(10,20,30)", + "range": [ + 0, + null + ], + "size": { + "x": 1920, + "y": 1080 + }, + "audioOffset": 0 + }, + "preview": { + "fps": 30, + "resolutionScale": 1 + }, + "rendering": { + "fps": 30, + "resolutionScale": 2, + "colorSpace": "srgb", + "exporter": { + "name": "@motion-canvas/ffmpeg", + "options": { + "fastStart": false, + "includeAudio": true + } + } + } +} \ No newline at end of file diff --git a/animation/memory_and_smart_pointers/src/project.ts b/animation/memory_and_smart_pointers/src/project.ts new file mode 100644 index 0000000..3a4de14 --- /dev/null +++ b/animation/memory_and_smart_pointers/src/project.ts @@ -0,0 +1,41 @@ +import { makeProject } from '@motion-canvas/core'; +import { Code, LezerHighlighter } from '@motion-canvas/2d'; +import { parser } from '@lezer/cpp'; +import { tags } from '@lezer/highlight'; +import { HighlightStyle } from '@codemirror/language'; + +const MyStyle = HighlightStyle.define([ + { tag: tags.keyword, color: '#569CD6' }, // VSCode Keyword color + { tag: tags.controlKeyword, color: '#C586C0' }, // VSCode Control Keyword color + { tag: tags.operatorKeyword, color: '#C586C0' }, // VSCode Control Keyword color + { tag: tags.comment, color: 'gray' }, // VSCode Comment color + { tag: tags.className, color: '#4EC9B0' }, // VSCode Class Name color + { tag: tags.constant(tags.variableName), color: '#B5CEA8' }, // VSCode Constant color + { tag: tags.function(tags.variableName), color: '#DCDCAA' }, // VSCode Function color + { tag: tags.function(tags.propertyName), color: '#DCDCAA' }, // VSCode Function color + { tag: tags.propertyName, color: '#DCDCAA' }, // VSCode Function color + { tag: tags.number, color: '#B5CEA8' }, // VSCode Number color + { tag: tags.string, color: '#CE9178' }, // VSCode String color + { tag: tags.typeName, color: '#4EC9B0' }, // VSCode Type Name color + { tag: tags.squareBracket, color: '#C586C0' }, // VSCode Square Bracket color + { tag: tags.bracket, color: '#C586C0' }, // VSCode Bracket color + { tag: tags.brace, color: '#DDDD22' }, // VSCode Brace color + { tag: tags.processingInstruction, color: '#C586C0' }, // VSCode Brace color + { tag: tags.arithmeticOperator, color: '#D16969' }, // VSCode Arithmetic Operator color +]); + +Code.defaultHighlighter = new LezerHighlighter(parser, MyStyle); + +import './global.css'; + +import memory from './scenes/memory?scene'; +import stack from './scenes/stack?scene'; +import stack_persistent from './scenes/stack_persistent?scene'; +import heap from './scenes/heap?scene'; +import code from './scenes/code?scene'; +import memory_show from './scenes/memory_show?scene'; + +export default makeProject({ + scenes: [ + code], +}); diff --git a/animation/memory_and_smart_pointers/src/scenes/code.meta b/animation/memory_and_smart_pointers/src/scenes/code.meta new file mode 100644 index 0000000..f0654cf --- /dev/null +++ b/animation/memory_and_smart_pointers/src/scenes/code.meta @@ -0,0 +1,5 @@ +{ + "version": 0, + "timeEvents": [], + "seed": 2771218248 +} \ No newline at end of file diff --git a/animation/memory_and_smart_pointers/src/scenes/code.tsx b/animation/memory_and_smart_pointers/src/scenes/code.tsx new file mode 100644 index 0000000..c4e696a --- /dev/null +++ b/animation/memory_and_smart_pointers/src/scenes/code.tsx @@ -0,0 +1,310 @@ +import { createRef } from '@motion-canvas/core/lib/utils'; +import { makeScene2D, Code, lines } from '@motion-canvas/2d'; +import { all, waitFor, waitUntil } from '@motion-canvas/core/lib/flow'; +import { DEFAULT } from '@motion-canvas/core/lib/signals'; +import { BBox, Vector2 } from '@motion-canvas/core/lib/types'; + +export default makeScene2D(function* (view) { + const codeRef = createRef(); + const code2Ref = createRef(); + + yield view.add(); + + yield view.add(); + + + const duration = 1.0 + + const code_good_names = `\ +// 😱 Manual allocation is bad, especially in functions! +namespace { + +struct Pool { + static int* GetPtr() { return &data_; } + inline static int data_{}; +}; + +int* AllocateVariable() { + return new int; +} + +int* AllocateArray(int size) { + return new int[size]; +} + +int* BorrowDataFromPool() { + return Pool::GetPtr(); +} + +} // namespace + +int main() { + auto* ptr_1 = AllocateVariable(); + auto* ptr_2 = AllocateArray(20); + auto* ptr_3 = BorrowDataFromPool(); + delete ptr_1; + delete[] ptr_2; + return 0; +}` + + const code_flipped_names_1 = `\ +// 😱 Manual allocation is bad, especially in functions! +namespace { + +struct Pool { + static int* GetPtr() { return &data_; } + inline static int data_{}; +}; + +// 😱 Implementation changed, but not the name! +int* AllocateVariable() { + return Pool::GetPtr(); +} + +int* AllocateArray(int size) { + return new int[size]; +} + +int* BorrowDataFromPool() { + return Pool::GetPtr(); +} + +} // namespace + +int main() { + auto* ptr_1 = AllocateVariable(); + auto* ptr_2 = AllocateArray(20); + auto* ptr_3 = BorrowDataFromPool(); + delete[] ptr_2; + return 0; +}` + + const code_flipped_names_2 = `\ +// 😱 Manual allocation is bad, especially in functions! +namespace { + +struct Pool { + static int* GetPtr() { return &data_; } + inline static int data_{}; +}; + +// 😱 Implementation changed, but not the name! +int* AllocateVariable() { + return Pool::GetPtr(); +} + +int* AllocateArray(int size) { + return new int[size]; +} + +// 😱 Implementation changed, but not the name! +int* BorrowDataFromPool() { + return new int; +} + +} // namespace + +int main() { + auto* ptr_1 = AllocateVariable(); + auto* ptr_2 = AllocateArray(20); + auto* ptr_3 = BorrowDataFromPool(); + delete ptr_3; + delete[] ptr_2; + return 0; +}` + + const code_bad_names = `\ +namespace { + +struct Pool { + static int* GetPtr() { return &data_; } + inline static int data_{}; +}; + +int* Foo() { + return Pool::GetPtr(); +} + +int* Bar(int size) { + return new int[size]; +} + +int* Buzz() { + return new int; +} + +} // namespace + +int main() { + auto* ptr_1 = Foo(); + auto* ptr_2 = Bar(20); + auto* ptr_3 = Buzz(); + delete ptr_3; + delete[] ptr_2; + return 0; +}` + + const code_with_include = `\ +#include "lib.hpp" + +int main() { + auto* ptr_1 = Foo(); + auto* ptr_2 = Bar(20); + auto* ptr_3 = Buzz(); + // 😱 What should we do with these pointers? + return 0; +}` + + const code_declarations = `\ +int* Foo(); +int* Bar(int number); +int* Buzz();` + + + yield* codeRef().code(code_good_names, 0).wait(duration); + yield* waitFor(duration); + + yield* codeRef().code(code_flipped_names_1, duration); + yield* codeRef().code(code_flipped_names_2, duration).wait(duration); + yield* waitFor(duration); + + yield* codeRef().code(code_bad_names, duration).wait(duration); + yield* waitFor(duration); + + yield* all( + code2Ref().code(code_with_include, duration).wait(duration), + codeRef().code(code_declarations, duration).wait(duration) + ); + yield* waitFor(duration); + + const code_object_empty = `\ +class Object { + private: + int* data_{}; +};` + + yield* code2Ref().code('', 0); + yield* codeRef().code(code_object_empty, 0); + yield* codeRef().fontSize(35, 0); + yield* codeRef().x(-200, 0); + yield* waitFor(duration); + + const code_object_construct = `\ +// 😱 Missing crucial special functions. +class Object { + public: + explicit Object(int number) : data_{new int{number}} {} + + private: + int* data_{}; +};` + + yield* all( + codeRef().code(code_object_construct, duration).wait(duration), + codeRef().x(-450, duration) + ); + yield* waitFor(duration); + + const code_object_destroy = `\ +// 😱 Missing crucial special functions. +class Object { + public: + explicit Object(int number) : data_{new int{number}} {} + + ~Object() { delete data_; } + + private: + int* data_{}; +};` + + yield* all( + codeRef().code(code_object_destroy, duration).wait(duration), + codeRef().x(-450, duration) + ); + yield* waitFor(duration); + + const code_object_copy_move_complete = `\ +class Object { + public: + explicit Object(int number) : data_{new int{number}} {} + + ~Object() { delete data_; } + + Object(const Object& other) + : data_{other.data_ ? new int{*other.data_} : nullptr} {} + + Object(Object&& other) : data_{other.data_} { other.data_ = nullptr; } + + Object& operator=(const Object& other) { + if (other.data_) { + data_ = new int{*other.data_}; + } + return *this; + } + + Object& operator=(Object&& other) { + data_ = other.data_; + other.data_ = nullptr; + return *this; + } + + private: + int* data_{}; +};` + + yield* all( + codeRef().code(code_object_copy_move_complete, duration).wait(duration), + codeRef().x(-600, duration), + codeRef().fontSize(30, duration) + ); + yield* waitFor(duration); + + + const unique_ptr = `\ +// Simplified. +template +class unique_ptr { + public: + explicit unique_ptr(T* ptr) : ptr_{ptr} {} + + ~unique_ptr() { delete ptr_; } + + unique_ptr(const unique_ptr& other) = delete; + unique_ptr& operator=(const unique_ptr& other) = delete; + + unique_ptr(unique_ptr&& other) : ptr_{other.ptr_} { other.ptr_ = nullptr; } + unique_ptr& operator=(unique_ptr&& other) { + ptr_ = other.ptr_; + other.ptr_ = nullptr; + return *this; + } + + // Missing getters and some other functions like reset. + + private: + T* ptr_{}; +}; +` + + yield* all( + codeRef().code(unique_ptr, 0).wait(duration), + codeRef().x(-600, duration), + codeRef().fontSize(30, duration) + ); + yield* waitFor(duration); + +}); diff --git a/animation/memory_and_smart_pointers/src/scenes/example.meta b/animation/memory_and_smart_pointers/src/scenes/example.meta new file mode 100644 index 0000000..2d62bec --- /dev/null +++ b/animation/memory_and_smart_pointers/src/scenes/example.meta @@ -0,0 +1,5 @@ +{ + "version": 0, + "timeEvents": [], + "seed": 1501821170 +} \ No newline at end of file diff --git a/animation/memory_and_smart_pointers/src/scenes/example.tsx b/animation/memory_and_smart_pointers/src/scenes/example.tsx new file mode 100644 index 0000000..5ec127c --- /dev/null +++ b/animation/memory_and_smart_pointers/src/scenes/example.tsx @@ -0,0 +1,400 @@ +import {makeScene2D} from '@motion-canvas/2d/lib/scenes'; +import {createRef} from '@motion-canvas/core/lib/utils'; +import { + CodeBlock, + edit, + insert, + lines, + word, + remove, + CodeModification, +} from '@motion-canvas/2d/lib/components/CodeBlock'; +import {all, waitFor, waitUntil} from '@motion-canvas/core/lib/flow'; +import { DEFAULT } from '@motion-canvas/core/lib/signals'; +import { BBox, Vector2 } from '@motion-canvas/core/lib/types'; + +export default makeScene2D(function* (view) { + const codeRef = createRef(); + + yield view.add(); + + + const duration = 1.5 + + const store = (...args: [TemplateStringsArray, ...any]) => args; + + function to_string([strings, ...values]: [TemplateStringsArray, ...any]): string { + return strings.reduce((acc, str, i) => { + const value = values[i] ?? ''; + return acc + str + value; + }, ' '); + } + + function append( + template_1: TemplateStringsArray, args_1: string[], + template_2: TemplateStringsArray, args_2: string[]) : [TemplateStringsArray, ...string[]] { + let new_template = Array.from(template_1); + let new_args: Array = args_1; + new_template[template_1.length - 1] += template_2[0] + new_template = new_template.concat(template_2.slice(1)) + new_args = new_args.concat(args_2) + return [new_template as unknown as TemplateStringsArray, ...new_args]; + } + + const isCodeModification = (code: any): code is CodeModification => (code as CodeModification).from !== undefined; + + function simplify( + args_in: [TemplateStringsArray, ...any]) : [TemplateStringsArray, ...string[]] { + const template = args_in[0] + const args = args_in.slice(1) + if (args.every((arg) => (typeof(arg) == "string") || isCodeModification(arg))) { + return args_in + } + let new_template: Array = []; + let new_args: Array = []; + let concatenate = false; + for (let i = 0; i <= args.length; i++) { + if (concatenate) { + concatenate = false; + new_template[new_template.length - 1] += template[i]; + } else { + new_template.push(template[i]); + } + if (i == args.length) { break; } + if (typeof(args[i]) == "string" || isCodeModification(args[i])) { + new_args.push(args[i]) + continue; + } + let simplified_arg = simplify(args[i]); + let simplified_template = simplified_arg[0] + let simplified_args = simplified_arg.slice(1) + const appended = append( + new_template as unknown as TemplateStringsArray, + new_args, + simplified_template, + simplified_args as string[]); + new_template = Array.from(appended[0]) + new_args = appended.slice(1) + concatenate = true; + } + return [new_template as unknown as TemplateStringsArray, ...new_args] + } + + + const code = (operator:any = ``, main:any = ``, operator_move:any=``) => store` + #include + #include + + struct HugeObject { + HugeObject() = default; + + explicit HugeObject(std::size_t data_length) + : length{data_length}, ptr{AllocateMemory(length)} {} + ${operator}${operator_move} + ~HugeObject() { FreeMemory(ptr); } + + std::size_t length{}; + std::byte *ptr{}; + }; + ${main} + ` + + const copy = `ptr = AllocateMemory(length); + std::copy(object.ptr, object.ptr + length, ptr);` + const steal = `ptr = object.ptr; + object.ptr = nullptr;` + + const operator_copy = ( + const_word:any = `const `, + copy_or_steal:any = copy, + ) => store` + HugeObject &operator=(${const_word}HugeObject& object) { + if (this == &object) { return *this; } + FreeMemory(ptr); + length = object.length; + ${copy_or_steal} + return *this; + } + ` + + const operator_move = ` + + HugeObject &operator=(HugeObject&& object) { + if (this == &object) { return *this; } + FreeMemory(ptr); + length = object.length; + ptr = object.ptr; + object.ptr = nullptr; + return *this; + } + ` + + const assign_fail = ` + // ❌ Does not compile. + storage.member_object = HugeObject{200};` + + const assign_int_fail = ` + // ❌ Does not compile either. + int& answer = 42;` + + const main_fn = (comment:any = ``, assign_temp:any = ``) => store` + struct HugeObjectStorage { + HugeObject member_object; + }; + + int main() { + HugeObject object{100}; + HugeObjectStorage storage{}; + storage.member_object = object;${assign_temp} + return 0; + } ${comment}` + + const comment = ` // storage and object are destroyed` + + const zoom_fn = (in_zoom: number) => new Vector2(in_zoom, in_zoom); + + yield * codeRef().edit(duration, false)(...simplify(code())); + yield * codeRef().selection([...word(7, 30, 28)], duration); + yield * waitFor(duration); + yield * codeRef().selection([...word(9, 20, 15)], duration); + yield * waitFor(duration); + yield * codeRef().edit(duration, true)(...code(edit(``, to_string(operator_copy())))); + yield * waitFor(duration); + yield * codeRef().selection([...lines(9)], duration); + yield * waitFor(duration); + yield * all( + codeRef().selection([...word(9, 26, 24)], duration), + codeRef().scale(zoom_fn(1.5), duration), + codeRef().position(new Vector2(-500, 200), duration), + ); + yield * waitFor(duration); + yield * all( + codeRef().selection([...lines(14)], duration), + codeRef().scale(zoom_fn(1.2), duration), + codeRef().position(new Vector2(50, -200), duration), + ); + yield * waitFor(duration); + yield * all( + codeRef().selection(DEFAULT, duration), + codeRef().scale(zoom_fn(0.7), duration), + codeRef().position(new Vector2(0, 0), duration), + ); + yield * waitFor(duration); + yield * all( + codeRef().position(new Vector2(0, -300), duration), + codeRef().edit(duration, true)(...simplify(code(operator_copy(), edit(``, to_string(main_fn()))))), + ); + yield * all( + codeRef().scale(zoom_fn(1.2), duration), + codeRef().position(new Vector2(400, -800), duration), + ); + yield * codeRef().selection([...lines(29)], duration); + yield * codeRef().selection([...lines(30)], duration); + yield * codeRef().selection([...lines(31)], duration); + yield * codeRef().edit(duration, true)(...simplify(code(operator_copy(), main_fn(insert(comment))))); + yield * waitFor(duration); + + // Show destructor + yield * all( + codeRef().selection(DEFAULT, duration), + codeRef().scale(zoom_fn(0.5), duration), + codeRef().position(new Vector2(0, 0), duration), + ); + yield * waitFor(duration); + yield * all( + codeRef().selection(DEFAULT, duration), + codeRef().scale(zoom_fn(1.2), duration), + codeRef().selection([...lines(18 )], duration), + codeRef().position(new Vector2(200, 0), duration), + ); + yield * waitFor(duration); + + // Show const + yield * all( + codeRef().selection(DEFAULT, duration), + codeRef().scale(zoom_fn(0.5), duration), + codeRef().position(new Vector2(0, 0), duration), + ); + yield * waitFor(duration); + yield * all( + codeRef().scale(zoom_fn(1.2), duration), + codeRef().selection([...lines(9, 16)], duration), + codeRef().position(new Vector2(50, 400), duration), + ); + yield * waitFor(duration); + yield * all( + codeRef().scale(zoom_fn(3.0), duration), + codeRef().selection([...word(9, 26, 5)], duration), + codeRef().position(new Vector2(100, 1400), duration), + ); + yield * waitFor(duration); + + // Remove const + yield * all( + codeRef().edit(duration, false)(...simplify(code(operator_copy(edit('const ', '')), main_fn(comment)))), + codeRef().selection([...word(9, 26, 12)], duration), + ); + yield * all( + codeRef().scale(zoom_fn(1.2), duration), + codeRef().position(new Vector2(50, 400), duration), + codeRef().selection([...lines(9, 16)], duration), + ); + yield *codeRef().selection([...lines(13, 14)], duration); + yield * codeRef().edit(duration, true)(...simplify(code(operator_copy('', edit(copy, steal)), main_fn(comment)))); + yield * waitFor(duration); + + // Look at the main again + yield * all( + codeRef().selection(DEFAULT, duration), + codeRef().scale(zoom_fn(0.5), duration), + codeRef().position(new Vector2(0, 0), duration), + ); + yield * waitFor(duration); + yield * all( + codeRef().scale(zoom_fn(1.2), duration), + codeRef().position(new Vector2(400, -800), duration), + ); + yield * codeRef().selection([...lines(29)], duration); + yield * codeRef().selection([...lines(30)], duration); + yield * codeRef().selection([...lines(31)], duration); + yield * codeRef().selection(DEFAULT, duration); + + yield * waitFor(duration); + // Assign temp + yield * all( + codeRef().scale(zoom_fn(1.3), duration), + codeRef().edit(duration, true)( + ...simplify( + code( + operator_copy('', steal), + main_fn(comment, insert(assign_fail))))), + codeRef().position(new Vector2(200, -1100), duration), + ); + yield * waitFor(duration); + yield * codeRef().edit(duration, true)( + ...simplify( + code( + operator_copy('', steal), + main_fn(comment, edit(assign_fail, assign_int_fail))))); + yield * waitFor(duration); + + yield * all( + codeRef().selection(DEFAULT, duration), + codeRef().scale(zoom_fn(0.5), duration), + codeRef().position(new Vector2(0, 0), duration), + codeRef().edit(duration, false)( + ...simplify( + code( + operator_copy('', steal), + main_fn(comment, remove(assign_int_fail))))), + ); + + // Add move operator + yield * waitFor(duration); + yield * all( + codeRef().scale(zoom_fn(1.0), duration), + codeRef().position([0, 260], duration), + codeRef().edit(duration, true)( + ...simplify( + code( + operator_copy(insert('const '), + edit(steal, copy)), + main_fn(comment), + insert(operator_move)))), + ); + yield * waitFor(duration); + yield * codeRef().selection([...word(9, 26, 24), ...lines(13, 14)], duration); + yield * waitFor(duration); + yield * codeRef().selection([...word(18, 26, 19), ...lines(22, 23)], duration); + yield * waitFor(duration); + + const comment_temp_bind = `// Can be bound to a temporary` + const comment_pick_overload = ` // The compiler picks Blah(int&&)` + + const blah_code = ( + comment_temp:any = ``, + comment_pick:any = ``, + blah_answer:any = ``, + blah_answer_comment:any = ``, + blah_move_answer:any = ``, + blah_move_answer_comment:any = ``, + ) => store` + #include + + void Blah(int&) { + std::cout << "&" << std::endl; + } + + void Blah(int&&) { + std::cout << "&&" << std::endl; + } + + int main() { + int&& answer = 42; ${comment_temp} + Blah(42);${comment_pick}${blah_answer}${blah_answer_comment}${blah_move_answer}${blah_move_answer_comment} + }` + + + yield * waitFor(duration); + yield * all( + codeRef().edit(duration, false)(...blah_code()), + codeRef().selection(DEFAULT, duration), + codeRef().scale(zoom_fn(1.0), 0), + codeRef().position(new Vector2(0, 0), 0), + ); + yield * waitFor(duration); + yield * codeRef().selection([...lines(11)], duration); + yield * codeRef().edit(duration, false)(...simplify(blah_code(insert(comment_temp_bind)))); + yield * waitFor(duration); + yield * codeRef().selection([...lines(12)], duration); + yield * codeRef().edit(duration, false)(...simplify(blah_code(comment_temp_bind, insert(comment_pick_overload)))); + yield * waitFor(duration); + yield * waitFor(duration); + + + const final_main = ` + int main() { + HugeObject object{100}; + HugeObjectStorage storage{}; + storage.member_object = object; + storage.member_object = HugeObject{200}; + storage.member_object = std::move(object); + return 0; + }` + + yield * codeRef().selection(DEFAULT, 0), + yield * codeRef().edit(duration, false)`${final_main}`; + yield * waitFor(duration); + yield * codeRef().selection([...lines(4)], duration); + yield * codeRef().selection([...lines(5)], duration); + yield * codeRef().selection([...lines(6)], duration); + yield * waitFor(duration); + + const rref_comment = ` // Prints "&&"` + const lref_comment = ` // Prints "&"` + const blah_answer_ref = ` + Blah(answer);` + const blah_answer_rref = ` + Blah(std::move(answer));` + + // Final rref example + yield * codeRef().selection(DEFAULT, 0), + yield * codeRef().edit(duration, false)(...blah_code()); + yield * codeRef().edit(duration, false)(...blah_code('', insert(rref_comment))); + yield * codeRef().edit(duration, false)(...blah_code('', rref_comment, insert(blah_answer_ref))); + yield * codeRef().edit(duration, false)(...blah_code( + '', rref_comment, blah_answer_ref, insert(lref_comment))); + yield * codeRef().edit(duration, false)(...blah_code( + '', rref_comment, blah_answer_ref, lref_comment, insert(blah_answer_rref))); + yield * codeRef().edit(duration, false)(...blah_code( + '', rref_comment, blah_answer_ref, lref_comment, blah_answer_rref, insert(rref_comment))); + + yield * waitFor(duration); + + yield * waitFor(duration); + +}); diff --git a/animation/memory_and_smart_pointers/src/scenes/heap.meta b/animation/memory_and_smart_pointers/src/scenes/heap.meta new file mode 100644 index 0000000..41ae958 --- /dev/null +++ b/animation/memory_and_smart_pointers/src/scenes/heap.meta @@ -0,0 +1,5 @@ +{ + "version": 0, + "timeEvents": [], + "seed": 4149161514 +} \ No newline at end of file diff --git a/animation/memory_and_smart_pointers/src/scenes/heap.tsx b/animation/memory_and_smart_pointers/src/scenes/heap.tsx new file mode 100644 index 0000000..acbaf66 --- /dev/null +++ b/animation/memory_and_smart_pointers/src/scenes/heap.tsx @@ -0,0 +1,346 @@ +import { Node, lines, word, makeScene2D, Code, Txt, Rect, Grid, Line, Layout } from '@motion-canvas/2d'; +import { all, sequence, waitFor } from '@motion-canvas/core/lib/flow'; +import { Vector2 } from '@motion-canvas/core/lib/types'; +import { createRef } from '@motion-canvas/core/lib/utils'; +import { createSignal, DEFAULT } from '@motion-canvas/core/lib/signals'; +import { CodeBlock, edit, insert, range } from '@motion-canvas/2d/lib/components/CodeBlock'; + +const RED = '#ff6470'; +const GREEN = '#99C47A'; +const BLUE = '#68ABDF'; +const WHITE = '#FFFFFF'; + +export default makeScene2D(function* (view) { + + const grid_ref = createRef(); + const address_ref = createRef(); + const data_rect_ref_1 = createRef(); + const data_rect_ref_2 = createRef(); + + const table_layout = + + table_layout.add( + ) + table_layout.add( + + + ) + table_layout.add( + ) + table_layout.add( + ) + + var stack_refs = [] + var line_refs = [] + + for (let i = 4; i >= 0; i--) { + const text_ref = createRef(); + const line_ref = createRef(); + stack_refs.push(text_ref); + line_refs.push(line_ref); + table_layout.add( + + + + + + + + + ); + } + stack_refs.reverse(); + + const command_txt_ref = createRef() + + table_layout.add( + + + + ) + + view.add(table_layout) + view.add() + view.add() + const code_stack = `\ +#include + +int main() { + int size = 2; + int* ptr = nullptr; + { + int array[size]; // 😱 Don't use C-style arrays! + array[0] = 42; + array[1] = 23; + ptr = array; + std::cout << "Before stack cleanup.\\n"; + for (int i = 0; i < size; ++i) { + std::cout << ptr[i] << std::endl; + } + } + // 😱 Code below leads to undefined behavior! + std::cout << "After stack cleanup.\\n"; + for (int i = 0; i < size; ++i) { + std::cout << ptr[i] << std::endl; + } + return 0; +}` + + const code_heap = `\ +#include + +int main() { + int size = 2; + int* ptr = nullptr; + { + // 😱 Don't use unprotected new and new[]! + int* array = new int[size]; + array[0] = 42; + array[1] = 23; + ptr = array; + std::cout << "Before stack cleanup.\\n"; + for (int i = 0; i < size; ++i) { + std::cout << ptr[i] << std::endl; + } + } + std::cout << "After stack cleanup.\\n"; + for (int i = 0; i < size; ++i) { + std::cout << ptr[i] << std::endl; + } + delete[] ptr; // 😱 What points to our data? + return 0; +}` + const code_ref = createRef() + + yield view.add( + ); + + const duration = 1.0 + + // Frame + yield* all( + code_ref().code(code_stack, duration), + waitFor(3 * duration) + ); + + // Frame + yield* all( + code_ref().code(code_heap, duration), + waitFor(3 * duration) + ); + + yield* all( + table_layout.x(-600, duration), + grid_ref().end(1, 2 * duration), + grid_ref().start(0, 2 * duration), + waitFor(3 * duration) + ); + + // Frame + yield* all( + stack_refs[0]().code(`size = 2`, duration), + code_ref().selection(lines(3), duration), + command_txt_ref().text('push(int)', duration / 3), + waitFor(3 * duration) + ); + + // Frame + yield* all( + stack_refs[1]().code(`ptr = nullptr`, duration), + code_ref().selection(lines(4), duration), + command_txt_ref().text('', duration / 3).to('push(int*)', duration / 3), + waitFor(3 * duration) + ); + + // Frame + yield* all( + command_txt_ref().text('', duration / 3).to('malloc(8)', duration / 3), + code_ref().selection(word(7, 16, 15), duration), + sequence(0.1, + address_ref().text('0x8eceb0', duration / 2), + data_rect_ref_1().opacity(0.8, duration), + data_rect_ref_2().opacity(0.8, duration), + ), + waitFor(3 * duration) + ); + + // Frame + yield* all( + stack_refs[2]().code(`array = 0x8eceb0`, duration), + command_txt_ref().text('', duration / 3).to('push(int*)', duration / 3), + code_ref().selection(lines(7), duration), + waitFor(3 * duration) + ); + + // Frame + yield* all( + command_txt_ref().text('', duration / 3), + code_ref().selection(lines(8), duration), + data_rect_ref_1().fill(BLUE, duration), + waitFor(duration) + ); + + // Frame + yield* all( + code_ref().selection(lines(8, 9), duration), + data_rect_ref_2().fill(BLUE, duration), + waitFor(3 * duration) + ); + + // Frame + yield* all( + stack_refs[1]().code(`ptr = 0x8eceb0`, duration), + code_ref().selection(lines(10), duration), + waitFor(3 * duration) + ); + + // Frame + yield* all( + code_ref().selection(lines(11, 14), duration), + waitFor(3 * duration) + ); + + // Frame + yield* all( + sequence(0.1, + stack_refs[2]().code('⁉️', duration)), + code_ref().selection(lines(15), duration), + command_txt_ref().text('', duration / 3).to('pop()', duration / 3), + waitFor(3 * duration) + ); + + // Frame + yield* all( + code_ref().selection(lines(16, 19), duration), + command_txt_ref().text('', duration / 3), + waitFor(3 * duration) + ); + + // Frame + yield* all( + sequence(0.1, + data_rect_ref_1().opacity(0, duration), + data_rect_ref_2().opacity(0, duration)), + code_ref().selection(lines(20), duration), + waitFor(3 * duration) + ); + + // Frame + yield* all( + sequence(0.1, + stack_refs[1]().code('⁉️', duration), + stack_refs[0]().code('⁉️', duration)), + code_ref().selection(lines(22), duration), + command_txt_ref().text('', duration / 3), + waitFor(3 * duration) + ); + + + + // Frame + yield* all( + code_ref().selection(DEFAULT, duration), + command_txt_ref().text('', duration / 3), + waitFor(3 * duration) + ); + + yield* waitFor(3.0); + +}); diff --git a/animation/memory_and_smart_pointers/src/scenes/memory.meta b/animation/memory_and_smart_pointers/src/scenes/memory.meta new file mode 100644 index 0000000..5ce0a4c --- /dev/null +++ b/animation/memory_and_smart_pointers/src/scenes/memory.meta @@ -0,0 +1,5 @@ +{ + "version": 0, + "timeEvents": [], + "seed": 1938444845 +} \ No newline at end of file diff --git a/animation/memory_and_smart_pointers/src/scenes/memory.tsx b/animation/memory_and_smart_pointers/src/scenes/memory.tsx new file mode 100644 index 0000000..15ce6ee --- /dev/null +++ b/animation/memory_and_smart_pointers/src/scenes/memory.tsx @@ -0,0 +1,188 @@ +import { makeScene2D } from '@motion-canvas/2d/lib/scenes'; +import { Node, Circle, Rect, Grid, Line } from '@motion-canvas/2d/lib/components'; +import { all, waitFor } from '@motion-canvas/core/lib/flow'; +import { Vector2 } from '@motion-canvas/core/lib/types'; +import { createRef } from '@motion-canvas/core/lib/utils'; +import { createSignal } from '@motion-canvas/core/lib/signals'; +import { CodeBlock } from '@motion-canvas/2d/lib/components/CodeBlock'; +import {Video} from '@motion-canvas/2d/lib/components'; +import travolta from '../../videos/travolta.mp4'; + +const RED = '#ff6470'; +const GREEN = '#99C47A'; +const BLUE = '#68ABDF'; + +export default makeScene2D(function* (view) { + const data_ref = createRef(); + const other_data_ref = createRef(); + const object_ref = createRef(); + const other_object_ref = createRef(); + const line_1 = createRef(); + const line_2 = createRef(); + const node_ref = createRef(); + const travolta_ref = createRef