Curso de AutoCAD 2D - Aula 2

Matheus Coutinho

3 Nov 202118:01

Summary

TLDRThis instructional video script covers essential AutoCAD drawing commands, focusing on lines, coordinates, and selection methods. It explains how to use the 'line' command for creating straight lines, the significance of using periods and commas in dimensions, and introduces relative Cartesian coordinates for constructing shapes. The script also touches on the 'polyline', 'circle', and 'rectangle' commands, detailing their use in drawing complex shapes. Additionally, it discusses selection techniques, including clicking, window, and crossing selection methods, crucial for modifying drawings effectively.

Takeaways

📝 The lesson is about drawing commands, Cartesian coordinates, and selection methods in a design software.
🖌 The 'line' command is used to create straight lines and can be accessed through an icon or keyboard shortcuts.
🔢 Cartesian coordinates are used for specifying points in the design, and the difference between using a comma and a period for decimal and coordinate separation is highlighted.
📐 Relative Cartesian coordinates are introduced for constructing figures, with the '@' symbol used to denote a relative position from the first point.
🔄 The 'Ortho' tool restricts cursor movement to the x and y axes, aiding in straight line drawings and is activated with the F8 key.
✅ The 'DISTANCE' command is utilized to measure linear distances within the design.
📏 'Polyline' is a command that creates a single object composed of multiple line segments, different from the simple 'line' command.
🔵 The 'circle' command allows for drawing circles by specifying the center point and radius or diameter.
📏 'Rectangle' command is used to create rectangles, which can be defined by area, length, or width, and also includes rotation options.
👉 Selection methods include clicking on an object, or using 'window' and 'crossing' selection windows to choose multiple objects based on their position within the selection area.
🛠 The lesson concludes with an overview of selection methods and a teaser for upcoming lessons on modification commands to further develop drawings.

Q & A

What is the main topic of the class discussed in the script?
-The main topic of the class is about drawing commands, Cartesian coordinates, and selection methods in a design software, likely AutoCAD.
What is the 'line' command used for in the script?
-The 'line' command is used to create lines by specifying points on the screen or by entering coordinates.
How can one access a command in the software mentioned in the script?
-A command can be accessed either by clicking on its icon or by using keyboard shortcuts.
What is the difference between using the 'line' command and specifying points with the mouse versus entering coordinates?
-Using the mouse to specify points is more visual and interactive, while entering coordinates allows for more precise control over the placement of the line.
What is the significance of the comma and the period in the script's context?
-In the script, the comma is used as a decimal separator when entering dimensions, while the period is used to specify a point or coordinate.
Can you explain the concept of relative Cartesian coordinates as mentioned in the script?
-Relative Cartesian coordinates refer to the method of specifying points based on their relation to a previously defined point, using the '@' symbol followed by the distance in each axis direction.
What is the 'orthogonal' tool mentioned in the script, and what is its purpose?
-The 'orthogonal' tool restricts the cursor movement to the X and Y axes, ensuring that lines are drawn in straight paths along these axes, which is crucial for maintaining the structure of the drawing.
What is the shortcut to activate and deactivate the 'orthogonal' tool in the script?
-The shortcut to activate and deactivate the 'orthogonal' tool is the 'F8' key.
What is the 'polyline' command, and how does it differ from the 'line' command?
-The 'polyline' command is used to create a single object composed of multiple line segments, unlike the 'line' command which creates individual lines. A polyline can be selected as a whole, whereas individual lines need to be selected separately.
How does the 'circle' command work in the script?
-The 'circle' command requires the user to specify the center point and then define the radius or diameter of the circle. There are also options to create a circle by specifying three or two tangent points.
What are the different methods of selection mentioned in the script, and how do they work?
-The script mentions three selection methods: clicking on an object, creating a 'window' selection, and a 'crossing' selection. The 'window' selection includes objects completely enclosed by the selection window, while the 'crossing' selection includes objects that intersect with the selection window.

Outlines

00:00

📏 Introduction to Drawing Commands and Coordinate Systems

This paragraph introduces the topic of the video, which is about drawing commands, Cartesian coordinates, and selection methods in a design software. It begins with a discussion on the 'line' command used to create straight lines, either by clicking on the screen or by entering coordinates manually. The importance of using the correct keyboard shortcuts and understanding the activation of commands in the command line is emphasized. The video also explains the difference between using a period and a comma when entering dimensions, with the period being used for decimal points in dimensions and the comma for separating coordinates. An exercise is presented to demonstrate the use of relative Cartesian coordinates for constructing a figure, highlighting the process of entering coordinates and the steps involved in drawing lines.

05:02

🛠 Utilizing Orthogonal Mode and Polyline Commands

The second paragraph focuses on the use of the 'orthogonal' tool for drawing straight lines along the x and y axes quickly. It describes how to activate this tool and the efficiency it brings to the drawing process. The paragraph then introduces the 'polyline' command, which allows for the creation of a single object composed of multiple line segments. The video demonstrates how to use the polyline command, including selecting individual segments and understanding the difference between a polyline and a simple line command.

10:04

🔶 Commands for Drawing Circles and Rectangles

This section of the script covers the commands for drawing circles and rectangles. It explains how to use the 'circle' command to specify the center and radius or diameter, and the options available for creating circles by three points, two points, or by radius. The 'rectangle' command is also discussed, with options to define a rectangle by vertices or by area and dimensions. The video provides examples of how to create rectangles with specific area measurements and how to draw rectangles with rotation angles. The importance of selecting the correct dimensions and the process of defining the rectangle's orientation are highlighted.

15:05

🔍 Selection Methods and Modifying Commands

The final paragraph discusses the various methods for selecting objects within the design software. It explains the use of grip points for moving objects and the difference between the 'pick', 'cross', and 'window' selection methods. The paragraph emphasizes the importance of understanding these selection techniques for efficient work in design. It concludes with a mention of the upcoming lessons on modification commands that will be used in conjunction with drawing commands to construct designs, encouraging the viewer to practice the skills learned in this session.

Mindmap

Keywords

💡Commands

Commands in the context of the video refer to the specific instructions or actions used in a design or drawing software to create or modify elements. They are central to the video's theme of teaching how to use a drawing program, with examples such as 'line', 'circle', and 'rectangle' commands being used to create basic geometric shapes.

💡Coordinates

Coordinates are used to specify the location of points in a two-dimensional space. In the video, Cartesian coordinates are essential for drawing lines and shapes accurately. The script mentions using coordinates to define points for lines and shapes, such as entering '5.25' for a line of 5 meters and 25 centimeters.

💡Cartesian Coordinates

Cartesian Coordinates are a system of defining positions on a plane using ordered pairs (x, y). The video explains how to use this system for drawing, including the use of relative coordinates, denoted by the '@' symbol, to relate new points to previously defined ones.

💡Selection Methods

Selection Methods are techniques for choosing objects or lines within a drawing program. The video discusses three types: clicking on an object, window selection, and crossing selection. These methods are vital for manipulating or modifying existing elements in a drawing.

💡Line Command

The Line Command is a specific function used to draw straight lines between two points. The video script describes how to activate this command, input coordinates, and terminate the command by pressing 'Enter' or 'Esc', illustrating its use in creating basic linear structures.

💡Polyline

A Polyline is a single object composed of multiple line segments. The video explains that unlike the 'line' command, a polyline allows for the creation of more complex shapes with multiple vertices, selected as a group when clicked.

💡Circle Command

The Circle Command is used to create circular shapes. The video mentions options for drawing a circle such as specifying the center point and the radius or diameter, which is integral to understanding how to create perfect circles in a drawing program.

💡Rectangle Command

The Rectangle Command is utilized to draw rectangles. The video script provides insights on how to define the vertices or specify dimensions to create a rectangle, including creating rectangles with a specific area or by specifying length and width.

💡Orthogonal Tool

The Orthogonal Tool restricts cursor movement to horizontal and vertical directions when activated. It is highlighted in the video as a fundamental function for ensuring that drawings align with the axes, which is crucial for maintaining accuracy in design work.

💡Grips

Grips are small squares or handles that appear on the ends and sometimes in the middle of selected objects in a drawing program. They are used for manipulating the object, such as resizing or moving. The video script describes how grips appear when an object is selected and their role in object manipulation.

💡Dimensional Accuracy

Dimensional Accuracy refers to the precision in specifying the size and dimensions of objects in a drawing. The video emphasizes the importance of using the correct decimal separator, such as a period (.) instead of a comma (,), to ensure accuracy when entering dimensions.

Highlights

Introduction to drawing commands, Cartesian coordinates, and selection methods in AutoCAD.

Explanation of the 'line' command for creating straight lines in AutoCAD.

Accessing commands via icons or keyboard shortcuts in AutoCAD.

Difference between using mouse clicks and entering coordinates for the 'line' command.

The importance of specifying the first point before drawing a line.

Using the 'Enter' or 'Esc' key to end the 'line' command.

Clarification on the use of the comma and period in AutoCAD for dimensions and coordinates.

Practical example of drawing a line with a specific dimension using the 'line' command.

Introduction to relative Cartesian coordinates for constructing figures.

Demonstration of drawing a figure using relative coordinates in AutoCAD.

Activation of the 'Ortho' tool for constrained movement along the X and Y axes.

Using the 'Ortogonal' function to ensure drawings stay within bounds.

Shortcut to activate and deactivate the 'Ortogonal' tool using the F8 key.

Using the 'DI' command to measure distances in AutoCAD.

Overview of the 'polyline' command for creating complex line objects.

Difference between the 'line' and 'polyline' commands in creating line objects.

Introduction to the 'circle' command and its various options for drawing circles.

Using the 'circle' command to draw a circle by specifying the center and radius.

Explanation of constructing rectangles using the 'rectang' command in AutoCAD.

Creating a rectangle with a specific area using the 'rectang' command.

Difference between 'window' and 'cross' selection methods in AutoCAD.

Practical demonstration of selecting objects using the 'window' and 'cross' methods.

Conclusion of the lesson and introduction to modification commands for future lessons.