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3answers
526 views

OpenGL ES, orthographic projection and viewport

I want to make some simple 2D game on iOS to familiarize myself with OpenGL ES. I started with Ray Wenderlich’s tutorial (How To Create A Simple 2D iPhone Game with OpenGL ES 2.0 and GLKit). That ...
3
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0answers
59 views

How do I align the cube in which shadows are computed with the view frustrum? (“View Space aligned frustum”)

Short and concise: Given 8 world space positions that form a cube of arbitrary size, position and orientation and given an arbitrary light direction. How do I compute the View and Projection matrix ...
2
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0answers
162 views

Unproject considering parallax depth

How can I take screen coordinates (or alternatively world coordinates on the 'primary' parallax plane) and find out what world coordinates they translate into when taking parallax depth into account? ...
2
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0answers
152 views

Stereo 3D: drawing 2D elements at apparent screen depth

I'm developing an application making use of DirectX11's stereoscopic features. At such I am not relying on nVidia's automatic implementation. That means I have to replicate a way to render 2d elements ...
1
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0answers
21 views

How to use GetViewProjMatrix().TransformVector(LineDirection) in UE4?

I try to project a 3D vector (a direction, not a position) in screen space, but it does not return satisfying results: FVector LineDirectionOnScreen = ...
1
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0answers
32 views

Construction of perspective matrix

Is it possible to Construct a perspective matrix by multiplying a perspective transformation with a parallel projection ? I want a perspective projection in 2D space which is calculated by ...
1
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0answers
30 views

Perspective projection math help?

I have points X,Y,Z and have a camera at Cx,Cy,Cz. Assuming the camera is not rotated and is facing the -Z direction and is at 0,0,0. What would the math be for projecting the X,Y,and Z values onto ...
1
vote
0answers
226 views

What is the connection between an isometric angle and scale

I am trying to work out an isometric projection matrix for a custom angle. In the engine I'm using there's a projection matrix defined like so: projection.rotate(45 * (Math.PI / 180) ); scale = ...
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0answers
19 views

Projection type/camera angle in Alien Soldier

I am trying to build a 2D game similar to Alien Soldier from oldies (Sega Genesis). The problem I am having is with assets. What kind of projection/camera angle does the Alien Soldier use for it's ...
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0answers
49 views

Perspective projection

I'm studying Perspective projection in a computer graphics course and i'm really confused about a detail. The study material says there are 3 cases: Case 1: View plane parallel to the xy plane and ...
0
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0answers
65 views

How to convert Screen-space translation into World-space translation

private void Translate(SceneMouseMoveEventArgs args) { var camera = args.Camera; origin_screenspace = camera.UnProject(_position).Xy; cursor_screenspace = new ...
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0answers
79 views

Perspective Projection Far Plane Not Clipping?

I've just discovered that far away objects in my world don't seem to clip like they should with a perspective projection matrix. When I fly far away from my main landscape, so that I am much more ...
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0answers
142 views

Change 2D Angle Into Isometric Angle

i Rendered My Sprite With 72 Angles In Isometric View. Rendered Frame Number 0 And Angle 0 Is When My Sprite Looking Right And And I Rendered My Sprite Every 5 Angle. In My 2D Game My Sprite Moving ...
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0answers
63 views

Rasterizing euclidean planes

I'd like to visualize a BSP tree. To do this, I need to project an arbitrary euclidean plane onto a projection plane. I was thinking about calculating the intersections of the plane with the viewing ...