Using cameraviewport for rear mirror
Blitz3D Forums/Blitz3D Beginners Area/Using cameraviewport for rear mirror
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Hi I managed to get the rear view camera working by creating it after the main camera. Otherwise it doesnt appear. The problem is that I need to change the viewport of the rear view mirror to fill the whole screen and have the regular camera fill the place where the rear-view mirror was. It all works except the smaller viewport doesnt appear at all after I switch their viewport co-ords. Im assuming its because the larger viewport is rendered over the smaller one. I solved this problem before by creating them in a certain order but now doing this would mean destroying and creating cameras whenever the player wants a better view in the mirror. So.. is there any other way of controlling the order in which cameras are rendered? |
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http://www.blitzbasic.com/Community/posts.php?topic=47663 I never got around to improving it. Andy |
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Try using 'entityorder' to draw one of the one with the smaller viewport last "over everything else" |
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I had problems too when doing a rear view driving mirror. Doing the rear view was easy, it was flipping the thing into a mirror thing at the same time that was causing me the headache. In the end I left it alone coz it worked perfectly without the 'mirror effect' and carried on knowing it would be on my 'to do' list at a later date. |
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Andy, that example doesnt use cameraviewport, I need like a small 3d window inside a large 3d window, I think you are using clsmode or something. Ah dunno about entityorder, does that effect the order in which cameras render? Ill try it out.... |
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Puki : Did you render to texture? A straightforward way of flipping a mirror is to reverse the U texture coordinate and let the GPU worry about it! Apply texture back-to-front sprite Position mirror sprite Render Rearview cam to texture buffer Render main view |
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James (BlitzSupport) is your man - he donated some rear view mirror code three years ago - Mousey mad some slight changes to it and it works really well (although this type of code is a cpu hogger). I think it exists in one form or another in the code archives. IPete2. |
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Yeh, it is the one with the Smarties bouncing about in it |
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>Andy, that example doesnt use cameraviewport, I need like >a small 3d window inside a large 3d window, I think you >are using clsmode or something. No, I am simply rendering 2 cameras and copyrecting the view from the mirror onto a texture which is then painted on to a quad using reversed u coordinates. I would use the same approach to create a rear view mirror, and just parent the rear view mirror to the driver cam. Very simple and easy to do. Andy |
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ok thanks, got it now |