What commands can be added in the display list?
If these commands are called when a display list is created, they are executed immediately….which is stored in a display list.
| glColorPointer() | glFlush() | glNormalPointer() |
|---|---|---|
| glFeedbackBuffer() | glIsEnabled() | glTexCoordPointer() |
| glFinish() | glIsList() | glVertexPointer() |
Table of Contents
What is glNewList?
Comments. Display lists are groups of OpenGL commands that have been stored for later execution. Display lists are created with glNewList. All subsequent commands are placed in the display list, in the order they are issued, until glEndList is called. The glNewList function has two parameters.
What are display lists in computer graphics?
Display lists are used to optimize rendering performance (ie faster rendering). They are mainly used for rendering large objects, which requires a large number of calls to glVertex. Note that the glVertex call is SLOW. The display list is not the only technique to improve rendering speed.
What is glCallList?
Description. glCallList causes the named display list to be executed. Commands saved in the display list are executed in order, as if they were called without using a display list. If the list has not been defined as a display list, glCallList is ignored. glCallList can appear inside a display list.
What are display commands?
Use the DISPLAY system command to display information about the operating system, jobs and application programs that are running, processor, devices that are online and offline, central storage, server policy status, workload management service and time of day.
What are the types of display commands?
Returns the result of an expression. expression the expression to display the result of. Shows the output of a function. function the function to display the output of… Displays relationship information for the currently active Analytics table:
- the names of the child tables.
- key field names.
- index names.
Are there some OpenGL commands that cannot be added to the display list?
Note that not all OpenGL commands can be stored in display lists. Since the display list is part of the server state, commands related to client state cannot be placed in the display list, for example glFlush(), glFinish(), glRenderMode(), glEnableClientState(), glVertexPointer(), etc
What is glcolor3f in OpenGL?
Unsigned integer color components, when specified, map linearly to floating point values such that the largest representable value maps to 1.0 (full intensity) and 0 maps to 0.0 (zero intensity) .
What is GLint?
GLuint is just a shorter way of writing unsigned int: typedef unsigned int GLenum; typedef unsigned char GLboolean; typedef unsigned int GLbitfield; void typedef GLvoid; typedef signed char GLbyte; /* 1 byte signed */ typedef short GLshort; /* 2 bytes signed */ typedef int GLint; /* 4 bytes signed */ typedef unsigned char …
How is LPA displayed?
Use the DISPLAY PROG,LPA command to display the entry point, load point, and size of the modules in the LPA, and to display the minimum number of CSAs and ECSAs that should remain after dynamically adding a module to the LPA.
How are OpenGL commands stored in the display list?
Any OpenGl command can be stored in a display list. On display list creation, those commands are compiled into the display list. Subsequently, those commands can be called much faster (data already sent to the GPU) than classic rendering (direct mode). Create a display list
What are the arguments to glnewlist() in OpenGL?
glNewList() requires 2 arguments; the first is the index of the display list returned by glGenLists(). The second argument is mode, which specifies only compile or compile and also execute (render); GL_COMPILE, GL_COMPILE_AND_EXECUTE. So far, the preparation of the display list has been done.
What is Index offset in OpenGL?
For convenience, OpenGL provides glListBase() to specify the offset that is added to the display list indices when glCallLists() is called. In the example above, only 5 display lists are rendered; 1, 3, 5, 7 and 9 of the display lists. Therefore, the offset of the index value is index+0, index+2, index+4, index+6, and index+8.
How are display lists stored on the GPU?
Display Lists (DL) can store a list of OpenGl commands on the GPU. Any OpenGl command can be stored in a display list. On display list creation, those commands are compiled into the display list. Subsequently, those commands can be called much faster (data already sent to the GPU) than classic rendering (direct mode).
