glutSetColor(3GLUT) GLUT glutSetColor(3GLUT)NAME
glutSetColor - sets the color of a colormap entry in the layer of use for the current window.
SYNTAX
void glutSetColor(int cell,
GLfloat red, GLfloat green, GLfloat blue);
ARGUMENTS
cell Color cell index (starting at zero).
red Red intensity (clamped between 0.0 and 1.0 inclusive).
green Green intensity (clamped between 0.0 and 1.0 inclusive).
blue Blue intensity (clamped between 0.0 and 1.0 inclusive).
DESCRIPTION
Sets the cell color index colormap entry of the current window's logical colormap for the layer in use with the color specified by red,
green, and blue. The layer in use of the current window should be a color index window. cell should be zero or greater and less than the
total number of colormap entries for the window. If the layer in use's colormap was copied by reference, a glutSetColor call will force
the duplication of the colormap. Do not attempt to set the color of an overlay's transparent index.
SEE ALSO
glutGetColor, glutCopyColormap, glutInitDisplayMode
AUTHOR
Mark J. Kilgard (mjk@nvidia.com)
GLUT 3.7 glutSetColor(3GLUT)
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glutCopyColormap(3GLUT) GLUT glutCopyColormap(3GLUT)NAME
glutCopyColormap - copies the logical colormap for the layer in use from a specified window to the current window.
SYNTAX
#include <GLUT/glut.h>
void glutCopyColormap(int win);
ARGUMENTS
win The identifier of the window to copy the logical colormap from.
DESCRIPTION
glutCopyColormap copies (lazily if possible to promote sharing) the logical colormap from a specified window to the current window's layer
in use. The copy will be from the normal plane to the normal plane; or from the overlay to the overlay (never across different layers).
Once a colormap has been copied, avoid setting cells in the colormap with glutSetColor since that will force an actual copy of the colormap
if it was previously copied by reference. glutCopyColormap should only be called when both the current window and the win window are color
index windows.
EXAMPLE
Here is an example of how to create two color index GLUT windows with their colormaps loaded identically and so that the windows are likely
to share the same colormap:
int win1, win2;
glutInitDisplayMode(GLUT_INDEX);
win1 = glutCreateWindow("first color index win");
glutSetColor(0, 0.0, 0.0, 0.0); /* black */
glutSetColor(1, 0.5, 0.5, 0.5); /* gray */
glutSetColor(2, 1.0, 1.0, 1.0); /* black */
glutSetColor(3, 1.0, 0.0, 0.0); /* red */
win2 = glutCreateWindow("second color index win");
glutCopyColormap(win1);
SEE ALSO
glutSetColor, glutGetColor, glutCreateWindow
AUTHOR
Mark J. Kilgard (mjk@nvidia.com)
GLUT 3.7 glutCopyColormap(3GLUT)
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