20 replies to this topic

[omegasyphon]

how do i get get the mouse coords to move an object on the screen? is there a function in glut that i can use?

[grady]

http://reality.sgi.com/mjk/spec3/spec3.html

[omegasyphon]

now is their a tutorial or example that demonstrates this?

[omegasyphon]

alright why doesnt this work? if i move the mouse shouldnt it move what i have displayed or am i doing this wrong?

void processmousecords(int x,int y) { xrot=x; yrot=y; } void renderscene() { GLfloat x; glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW); glPushMatrix(); glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); glRotatef(x,1.0f,0.0f,0.0f); glRotatef(30.0f,0.0f,0.0f,1.0f); glEnableClientState(GL_VERTEX_ARRAY); glVertexPointer(3,GL_FLOAT,0,cords); glDrawElements(GL_TRIANGLE_STRIP,1600,GL_UNSIGNED_INT,corners); glPopMatrix(); glutSwapBuffers(); } void main() { GLfloat x=0.0; glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); glutCreateWindow("game engine console"); glutReshapeFunc(ChangeSize); glutDisplayFunc(renderscene); setuprc(); glutMotionFunc(processmousecords); glutMainLoop(); }

[PaulP]

is there anyway to process mouse input without using GLUT??

[a2k]

omegasyphon, try adding

glutPostRedisplay();

in your processmouse inputs function. this tells the renderer that the function has made an update.

paulP,

yes there is a way without glut. you use regular Win32 code. the topic goes into the WinProc, which i don''t wanna discuss, but that is where you would put your mouse processing commands.

a2k

[Obelix]

... and remove the local x variables. The one in main is never used and you should use yrot or xrot in renderscene.

[omegasyphon]

hehe a litter over sight i guess, forgot about that.

[mittens]

To answer some of your questions: Yes you can get mouse input without using the GLUT... Its called DirectInput, and it kicks ass (writing a tutorial on mouse movement with DI, and DirectAudio as we speak actually).

------------------------------
Trent (ShiningKnight)
E-mail me
OpenGL Game Programming Tutorials

[Tassadar]

Try glutPassiveMouseFunc

or something like that... check the specs!!!!

[a2k]

ShiningKnight, looking forward to it. Are there any tutes out there right now that cover some of that stuff? (maybe i''ll check nehe.) either way, when will your tute come out?

a2k

[mittens]

Hmmm... Whenever I feel like writing the tut (I just wrote a 17 page one on .md2 loading and .ms3d loading that should be up on NeHe''s site pretty soon... So I''m a little burned out on writing). But the code *IS* done, so whenever I feel like writing, I''ll write it.

------------------------------
Trent (ShiningKnight)
E-mail me
OpenGL Game Programming Tutorials

[omegasyphon]

ok what is the difference between the two?

glutMotionFunc(processMouseActiveMotion);
glutPassiveMotionFunc(processMousePassiveMotion);

[omegasyphon]

cool it works

[PaulP]

I thought abut DirectInput, but i already know how to use that, i wanted to know if there was any other pratical ways to trap the mouse!!

As for the tut's, looking forward to them, i already know how to use DirectInput, but i always benefit from looking at tutorials, i get to see all the little tricks i missed first time round!!

Will they be based on C or C++??



Edited by - PaulP on July 7, 2001 7:40:58 PM

[omegasyphon]

i found after searching that their are very little tutorials on directinput about devices. but theres a ton on graphics

[Oluseyi]

That''s because the SDK documents are fairly complete. There isn''t too much to mouse input in DI - or keyboard either. Joystick is just a little bit more involved. So, check your SDK docs - the answer lies within.

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Or some fantasy-sounding junk like that...

[merlin9x9]

Don''t bother with DirectInput to grab the mouse, unless you need automatic buffering (which you could set up using less code than it takes to initialize DirectInput properly). Use GetCursorPos (and SetCursorPos to set the position) instead.

[shadow_dancer]

whenever i try to read the mouse coords with GetCursorPos, my game crashes. why?