Raydium 3D Game Engine

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 Post subject: Add a mirror camera
PostPosted: Thu Aug 19, 2010 12:44 am 
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Joined: Thu Aug 19, 2010 12:32 am
Posts: 2
Hello. This is Eduardo from Brazil.

I'm working on a experiment to evaluate the driver behavior when he is about to crash laterally with another car. For that, ManiaDrive is being used.

It came up the need to have lateral rear mirrors for the driver to identify the other car, in a crash path.

The only way I found to have the rear mirrors is to place a viewport camera in each side of the car, using the following line codes (example for right side mirror):

raydium_viewport_enable("camera2");
raydium_window_view_perspective(50,0.02,100);
raydium_ode_element_camera_inboard_name("corps",0.25,0.40,0,-0.5,0.75,0.2);
raydium_sky_box_render(raydium_camera_x,raydium_camera_y,raydium_camera_z);

raydium_camera_replace();
raydium_ode_draw_all(RAYDIUM_ODE_DRAW_NORMAL);
raydium_viewport_save();
raydium_clear_frame();

But by doing that, the image appears wrongly mirroed (when the other car moves to the right on my back, the mirror shows it going to the left). Of course that is because it is the point of view of the camera.

Do you know how to produce a correct mirror effect?


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 Post subject: Re: Add a mirror camera
PostPosted: Thu Aug 19, 2010 11:41 am 
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Joined: Sun Mar 16, 2003 2:53 am
Posts: 2590
Location: gnniiiii (Scrat)
Interesting question !
The solution is to change the way you're rendering the viewport:
Code:
// this is the mirror:
raydium_viewport_draw("camera2",80,70,-60,30);

// ... of this:
raydium_viewport_draw("camera2",20,70,60,30);


I've updated the documentation accordingly, thanks for this question :)


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 Post subject: Re: Add a mirror camera
PostPosted: Wed Oct 06, 2010 12:19 am 
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Joined: Thu Aug 19, 2010 12:32 am
Posts: 2
Great! It works, thanks a lot!

The experiments were carried out.


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