Sfml draw line thickness This is the best way if you want lines with no thickness. '. They even allow drawing points or lines. 👎 1 Shadowblitz16 reacted with thumbs down emoji All reactions Aug 25, 2013 · The tutorial claims a line with no thickness is simply two sf::Vertex, whereas a line with thickness is a rotated rectangle. However, there's a difference: if the user has two points and he wants a line segment between them with thickness, then boilerplate code needs to be written for said rectangle to achieve desired effect. I'd like to know a way to make this drawings instant, or just get rid of these flashes. So, most of the roads I've been on have greater than zero thickness, so I'd like to give it a width. If it doesn't, it can be drawn with a line primitive. « Last Edit: December 03, 2015, 09:16:21 am by mkalex777 » Lines. Basically what I need is to draw a series of lines of equal thickness all connected to each other from where the last left off. rotate(45); Line without thickness: Dec 30, 2011 · For 1-pixel lines you can draw sf::Lines primitives, and for lines with thickness you can use rotated sf::RectangleShape. And if you want to draw lines with thickness, use rotated rectangles. A line with thickness is basically a triangle. rotate(45); Line without thickness: Jan 30, 2012 · Developing 2d engine&game using: sfml, box2d, librocket, spark2, zoom&zoost, thor The middle mouse scroll event changes the width of these lines from 1 to 10, which is very convenient in OpenGL as opposed to SFML as it didn't have any explicit line thickness adjustments. . f); Line without thickness: With this relaxed definition, you can draw stars using sf::ConvexShape for example. This class is derived from sf::Window, and inherits all its functions. rotate(45); Line without thickness: Apr 28, 2012 · It seems that in SFML2, the general consensus is that if you want to draw lines, pass a vertex array to draw(). So I updated the code to support also \r\n as new Jan 19, 2015 · You could use a TrianglesStrip primitive and calculate the calculate the positions based on a line with a thickness. 6. An arc is effectively a connected set of lines in the same way that a circle can be but only some of the circle. This is the way you draw pretty much everything in SFML. Dec 3, 2015 · I know about Window. If I comment out the border thickness, both draw correctly. - grybouilli/SFML-line-with-thickness Set the type of primitives to draw. hpp. I think it's because when sfml draws the line, instead of making the line appear instantly, like it should it draws it gradually up, like it unwinds. To draw the entities provided by the graphics module, you must use a specialized window class: sf::RenderWindow. if you have a circle with a radius of 10 and an outline thickness of 5, the total radius of the circle will be 15). If I for example want to draw a line from the upper left to the lower right corner of a 200x50 px rectangle, the line will look alright starting from a value of 1. 0f thickness, but it varies with the position and angle, so there is no safe way to get the right thickness. love. Oct 23, 2019 · I come from love2d where drawing a line is as simple as love. Draw with primitive type Line, but it render one pixel line. f)); line. Each line will end at a specific point then the next will be drawn to another point, very similar to a line graph, just with thicker lines. If you take a look at the class reference for Drawable, the base class of any object passed into draw(), you can get a good idea of what classes are available. Nov 14, 2009 · I tried to find a value that resembles 1. What bugs me, though, is that the shape implementation obviously has access to path rendering (e. Let's say they're roads, and the vector goes from road. Parameters Lines. 03077f. rotate(45. As a matter of fact, vertex arrays are used internally by all other SFML classes. To draw multiple connected lines, you can use a vertex array. Line with thickness: A line with thickness is basically a triangle. Line with thickness: Lines. 03. - SFML-line-with-thickness/README. Click here to switch to the latest version. end and doesn't visit any coordinate more than once and does not collide with itself. Building custom shapes. begin to road. May 17, 2024 · So so close to getting my visibility polygon working. Oct 18, 2015 · Drawing is simply a matter of passing the shape into the draw() method of RenderWindow. ellipse(drawmode,x,y,xr,yr); and setting the width of a line shape is as easy as. This new tutorial will teach you how to draw simple 2D shapes, such as lines, rectangles, circles or polygons with SFML. f) Derive 2 vectors perpendincular to each given point. At first I thought perhaps it might be some float rounding thing, but that doesn't seem to be the case. The drawing window. Definition at line 43 of file Shape. So, 5 lines will be equal to 10 vertices. window. f); Line without thickness: Feb 14, 2024 · Note that Spline creates the entire polyline as a single object and draws it with a single draw call whereas drawing multiple sf::RectangleShapes (one for each edge) is one draw per edge. Line with thickness: sf::RectangleShape line(sf::Vector2f(150. If you want thickness, you must draw a rotated rectangle instead (sf::RectangleShape). Mar 4, 2017 · Luckily, though, Selba Ward also has Spline that can draw polylines (it can even draw them as bezier curves) and has recently had the addition of thickness. Создаем её в качестве массива вершин типа Vertex Mar 8, 2016 · As for the width part you would have to set the width before the call to glBegin(). Explore Teams Lines. \n The maths behind the approach \n. As one developer put it, 'If it has any thickness, then its a rectangle. This function defines how the vertices must be interpreted when it's time to draw them: As points ; As lines ; As triangles ; As quads The default primitive type is sf::Points. They allow for a more flexible definition of 2D entities, containing as many triangles as you need. You can tell where each point 'breaks' the line when the line width gets thicker. Here are a few comparison screenshots with the previous code: Code as is above. So, I would like to draw a line from a vector of vertices. By default, the outline is extruded outwards from the shape (e. It is a collection of SFML drawables that can be used Jul 13, 2010 · My program involves an awful lot of zooming in and out from a 1:1 view to a 1:4 view on occasion, which means that the line thicknesses need to be altered quite often (thickness 1 works fine when zoomed in, but "dissipates" when zoomed out, in which case thickness 4 works best. Color Selection: Offers a choice of 10 colors for drawing. Shown below, some of the lines have odd double pixel thick areas which occur during certain angles. draw (line_with_thickness); // отрисовка линии // Линия с нулевой толщиной. Logged Selba Ward -SFML drawables With this relaxed definition, you can draw stars using sf::ConvexShape for example. I need to specify line thickness. FYI, Selba Ward's Line can also draw a simple line with or without thickness and also used to use sf::RectangleShape internally but was replaced by custom It also adds text-specific properties such as the font to use, the character size, the font style (bold, italic, underlined and strike through), the text color, the outline thickness, the outline color, the character spacing, the line spacing and the text to display of course. The Line class can draw with or without thickness. (Technically the sprites are also at buffer resolution, if you rotate them the edges will be high res, it's just the texture that is pixelated) Apr 10, 2012 · The new method (SFML 2. Source: Line segment with thickness - SFML/SFML GitHub Wiki Apr 6, 2013 · If you just want to draw a single line, use a static array of vertex (sf::Vertex[]) rather than a sf::VertexArray, which uses dynamic memory allocation. What you get is every angle drawn will be perpendicular to the slope of it's next point, thus having consistent thickness throughout the entire draw. You would have to end the draw call, change the width, go 1 vertex back and start a new draw call. Then you add or subtract for example 2 pixels and that's your TrianglesStrip positions (red points) and since it's a TrianglesStrip the trail will be continues. - skyrpex/RichText I'm not sure why the 'gaps' appear when I'm using the code below. This would leave slight gaps on each point so a simple sf::CircleShape dot covered that up. md at master · grybouilli/SFML-line-with-thickness Aug 9, 2024 · In the future, I intend to bring more content about OpenGL and Vulkan, however, one of the best tools to “prepare” for these upcoming realities is SFML. g) Draw the rectangle with these 4 points. md at master · grybouilli/SFML-line-with-thickness Apr 17, 2016 · There is a Line class and even a Spline class included in Selba Ward (a collection of SFML drawables). I tried to add conditions to change point count for CircleShape depends on circle count, it's size and scale, but it seems like not a trivial task Lines. setlinewidth(width); anyways missing these just doesn't sound simple or fast can they be added? Jun 16, 2020 · Hello I'm trying to achieve the following: My current code for achieving this in OpenGL is the following: void draw_thick_line(vec2 start, vec2 end, GLfloat thickness) { GLfloat slope_angle = Lines. So, if you need a line with thickness, consider using Selba Ward. f); Line without thickness: May 25, 2013 · What I found was that when I set a border thickness to my box, the first sprite to be draw on screen gets stretched out significantly. When adding a new point to create a new line to the set of connected lines, the placement of the two corners of the previous 'rectangle' need to be readjusted. A class to draw lines with thickness using SFML VertexArray and TriangleStrip. By the way, SFML is also interesting to enter the world of game and graphics development, besides you getting to better understand other libraries, such as: SDL2, Raylib, Allegro, besides also facilitating the learning of graphics engines Types of primitives that a sf::VertexArray can render. x), using sf::VertexArray, as eXpl0it3r mentioned, draws many lines at once (a much faster way to draw, if you're drawing more than one line). A linestrip (afaik) can not have it's width changed in a draw state as you say. SFML line with thickness ! \n Explanations \n The problematic \n. It may not seem much but the SFML devs have stated many times that, "if Oct 7, 2016 · So, you can use sf::VertexArray Check its tutorial. The SFML library gives tools to render stripped lines but their thickness is set and stuck to one pixel. The reason is simple: If your line has a thickness, it is a rectangle. Thickness line commented out Dec 31, 2010 · I've noticed that drawing angular lines in SFML often produces lines of inconsistent width. Will be easy to set up a line using the 'lines' primitive type. Rich text class for SFML2. Sep 23, 2015 · I'm using vertices for fast line drawing, but it seems not so useful, because it didn't support line thickness. rotate(45); Line without thickness: Apr 4, 2015 · Now, seeing how much work you guys have put into extension librarys I guess the scope of SFML is just a bit narrower then what I thought. Lines. g. To disable the outline, set its thickness to 0. The tricky part of rendering a set of connected thick lines is to put the corners of the connected rectangles in the right spot. ) is the same. The green points are where your object actually was. 0, but the interesting part (normal, extrusion. If you need thickness you can use sf::Triangles (don't use Quads because are deprecated and is not compatible with OpenGL ES). Nov 6, 2012 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. So I have this problem about drawing lines. line(x1,y1,x2,y2) and a ellipse is as simple as love. Drawing simple shapes Introduction. As mentioned in the SFML tutorials, a line is just two vertices in a vertex array or - if it has thickness - a rectangle. No problem. f); Line without thickness: May 27, 2019 · Int mode is to deny lines that could be drawn just by clicking and not dragging. I think using rotated rectangles is bad for several reasons. e) Optional: Set the thickness of the line by multiplying by the magnitude. There's no shape class for lines. Fortunately, SFML provides a graphics module which will help you draw 2D entities in a much simpler way than with OpenGL. rotate(45); Line without thickness: Lines. You can make it extrude towards the center of the shape instead, by setting a negative thickness. To fill this gap, SFML provides a lower-level mechanism to draw things: Vertex arrays. Line with thickness: sf::RectangleShape line(sf::Vector2f(150, 5)); line. To build a custom shape with SFML, you have to use the sf::Shape class. - grybouilli/SFML-line-with-thickness Jul 16, 2021 · This is an example of lines with thickness for SFML C++ running CodeBlocks 20. Dec 6, 2012 · I don't want to confuse you or anything, but when I wrote my line class I had a look at the old Line class from SFML 1. Points and lines have no area, therefore their thickness will always be 1 pixel, regardless the current transform and view. Line Thickness: Provides 5 different line thickness options. Jan 24, 2022 · I presume this is a line with thickness. If someone is drawing a large graph (which is what I'm doing), then using vertex arrays makes it very easy. Allows the user to draw lines of text with different styles and colors. . I suspect it's connected with MouseMoved update rate « Last Edit: May 28, 2019, 12:45:46 am by eXpl0it3r » Drawing Shapes: Enables drawing of six distinct shapes - line, rectangle, square, ellipse, circle, and triangle. There are also a few line classes listed on SFML's wiki in the Sources section - under Drawables. Warning: this page refers to an old version of SFML. Fill Option: Users can choose to draw shapes with or without fill. Undo Functionality: Allows users to undo actions. graphics. « Last Edit: August 02, 2013, 03:41:50 am by Jamin Grey » Shape defines a drawable convex shape ; it also defines helper functions to draw simple shapes like lines, rectangles, circles, etc. Jul 21, 2024 · A view will scale the coordinate system, and sprites will render scaled (so may look pixelated), but line primitive rendering happens at the resolution of the buffer regardless of view. The class from this repo aims to let users render lines with thickness of choice. That said, positioning that rectangle can be a little tricky. Dec 16, 2016 · Also as eXpl0it3r pointed out in the pull request on github that SFML only correctly support '\n' as a new line character in the ensureGeometryUpdate() function, if we have '\r\n' as a new line character that the ensureGeometryUpdate() function adds an extra blank character in the vertex array. It works somewhat different then in 2. 0 thickness value. f, 5. g connected line segments with a thickness) but that usability isn't exposed to the user. These lines are drawn with a 1. Apr 24, 2016 · 📅 Last Modified: Sun, 24 Apr 2016 13:34:08 GMT. When setting the alpha to transparent, you can see the trail has an opaque sf::CircleShape dot for each point. I'm using an SFML triangle fan with all the vertex points sorted by angle size with position 0 set to the mouse coords and the last element set to element 2, I needed to do this to fill in the gap for the last triangle. zze bwllgr npg asnanax oojlqhvc kot hcvh nzfv lganxi erpq