How do I change the size of my GL point?

July 3, 2019 Off By idswater

How do I change the size of my GL point?

You can change this size with the function glPointSize: void glPointSize(GLfloat size); The glPointSize function takes a single parameter that specifies the approximate diameter in pixels of the point drawn.

Which function is used to set point size?

The glPointSize function specifies the rasterized diameter of both aliased and antialiased points. Using a point size other than 1.0 has different effects, depending on whether point antialiasing is enabled. Point antialiasing is controlled by calling glEnable and glDisable with argument GL_POINT_SMOOTH.

How do you draw points in OpenGL?

One way to draw primitives is to use the glBegin command to tell OpenGL to begin interpreting a list of vertices as a particular primitive. You then end the list of vertices for that primitive with the glEnd command. glBegin, GL_POINTS tells OpenGL that the succeeding vertices are to be interpreted and drawn as points.

What is gl_PointSize?

gl_PointSize is a member of the gl_PerVertex named block: out gl_PerVertex { vec4 gl_Position; float gl_PointSize; float gl_ClipDistance[]; };

How do you change the point size on a plot in Matlab?

Direct link to this answer

  1. You can change the marker size for a line plot by setting the “MarkerSize” property, either as a name-value pair or by accessing the “Line” object.
  2. Name-value pair:
  3. If you set this property as a name-value pair with the “plot” function, you must set it after all the x,y pairs.

What is the range of gl_FragCoord?

0.5, 1023.5
The actual result is: gl_FragCoord. xy is in the range [0.5, 1023.5], not [0.0, 1023.0]. From the spec: “By default, gl_FragCoord assumes a lower-left origin for window coordinates and assumes pixel centers are located at half-pixel coordinates.

What is glGetUniformLocation?

glGetUniformLocation returns an integer that represents the location of a specific uniform variable within a program object. After linking has occurred, the command glGetUniformLocation can be used to obtain the location of a uniform variable.

What does GL Bindbuffer do?

glBindBuffer lets you create or use a named buffer object. Calling glBindBuffer with target set to GL_ARRAY_BUFFER or GL_ELEMENT_ARRAY_BUFFER and buffer set to the name of the new buffer object binds the buffer object name to the target.

What is the value for glpointsize in OpenGL?

Specifies the diameter of rasterized points. The initial value is 1. glPointSize specifies the rasterized diameter of points. If point size mode is disabled (see glEnable with parameter GL_PROGRAM_POINT_SIZE ), this value will be used to rasterize points.

When to use GL _ invalid _ value in OpenGL?

Otherwise, the value written to the shading language built-in variable gl_PointSize will be used. The point size specified by glPointSize is always returned when GL_POINT_SIZE is queried. Clamping and rounding for points have no effect on the specified value. GL_INVALID_VALUE is generated if size is less than or equal to 0.

How to enable and disable point antialiasing in OpenGL?

To enable and disable point antialiasing, call glEnable and glDisable with argument GL_POINT_SMOOTH. Point antialiasing is initially disabled. If point antialiasing is disabled, the actual size is determined by rounding the supplied size to the nearest integer.

How to change the size of a point?

Draw Something! When you draw a single point, the size of the point is one pixel by default. You can change this size with the function glPointSize: The glPointSize function takes a single parameter that specifies the approximate diameter in pixels of the point drawn.