The tag has no usage guidance.

learn more… | top users | synonyms

1
vote
2answers
215 views

Deferred rendering: camera inside point light's sphere of effect

I'm trying out deferred rendering and I'm using the tutorials at http://ogldev.atspace.co.uk. I've got the basics working and I'm currently trying to implement the final step from tutorial 37 ...
0
votes
1answer
25 views

Problem with stencil in directx 12

I'm trying to use stencil buffer in directx 12. I have problem that probably is really easy to solve. So, it's look like dx12 ignore it, ClearDepthStencilView() affect only depth, writing to stencil ...
3
votes
2answers
601 views

Stencil based mask with alpha

I'm trying to create a fog effect like civ 5: I tried creating a StencilSet shader that receives a mask and sets the stencil buffer to 1. I would render the following on every unexplored tile using ...
5
votes
1answer
826 views

Stencil mask with AlphaTestEffect

I am trying to pull off the following effect in XNA 4.0: The purple area has 50% opacity. I have gotten pretty close with the following code: public static DepthStencilState AlwaysStencilState = ...
1
vote
1answer
273 views

Stencil buffer appears to not be decrementing values correctly

I'm attempting to use the stencil buffer as a clipper for my UI system, but I'm having trouble debugging a problem I'm running in to. This is what I'm doing: A widget can pass a rectangle to the the ...
0
votes
0answers
42 views

How to create Line of Sight shader?

I have an algorithm to build my sight polygon: https://www.youtube.com/watch?v=x7tFnVX11x0 I want now to create a visibility from it that is similar to this: ...
1
vote
2answers
109 views

How to combine depth and stencil tests?

I have a continuous height-mapped mesh to represent landscape. I use the stencil test to create holes in the mesh. I draw holes to the stencil buffer and then use it to discard mesh fragments. ...
-1
votes
0answers
31 views

Create overlapping transparent images [duplicate]

I want to achieve this effect in the image. To make this I don't think a single pass to a stencil buffer would be enough because stencil buffers can't mask out the actual alpha inside of the ...
2
votes
1answer
121 views

Stencil Buffer not working as expected in OpenGL ES 2.0 (Android)

I'm trying to get to grips with the stencil buffer. Apart from setting up viewport, camera, etc, my OpenGL ES 2.0 initialisation code is: GLES20.glDisable(GLES20.GL_CULL_FACE); ...
2
votes
1answer
148 views

Stencil buffer VS conditional discard in fragment shader

I have a continuous height-mapped mesh to represent landscape. I also have 1 to let's say 10 wells on this landscape represented by additional models. What I want to achieve is to create an illusion ...
1
vote
0answers
922 views

Clipping polygons in XNA with stencil (not using spritebatch)

The problem... i'm drawing polygons, in this case boxes, and i want clip children polygons with its parent's client area. // Class Region public void Render(GraphicsDevice Device, Camera ...
0
votes
0answers
38 views

Drawing directly to XNA depth buffer

Is it possible to set the depth buffer (i.e. draw depth values directly) in XNA? All the examples I could find are showing how to render a 3D scene to a RenderTarget2D and get the depth information ...
1
vote
1answer
130 views

Can you do a stencil glow with native GM:S commands?

I am looking to a stencil glow on GM:S with d3d_* functions. I could not find anything how to access the stencil buffer though. Is it even possible to access the stencil buffer without using an ...
1
vote
1answer
119 views

Does glScissor affect stencil and depth buffer operations?

I know glScissor() affects glColorMask() and glDepthMask(), but does it affect the stencil and depth buffers? For example: glEnable(GL_DEPTH_TEST); glEnable(GL_SCISSOR_TEST); ...
1
vote
1answer
573 views

Correcting Lighting in Stencil Reflections

I'm just playing around with OpenGL seeing how different methods of making shadows and reflections work. I've been following this tutorial which describes using GLUT_STENCIL's and MASK's to create a ...
1
vote
0answers
186 views

Alternative to z-fail [closed]

This question is less technical but maybe someone had similar thoughts. I am wondering if the following algorithm still harms the stencil shadow patent? It is concerned with the invention of a "new ...
2
votes
1answer
287 views

How stencil buffer and glFrontFace help making a shadow?

I'm trying to understand the tutorial 27th in Nehe website. This is about how to cast a shadow of an object using stencil buffer in OpenGL. The idea here is checking the directions of all the faces of ...
0
votes
1answer
143 views

Shadows go through meshes, and also being applied to itself

I am using Ogre3D and I am using stencil shadows for my character. They work pretty well, but I have 2 problems: first, the shadow is applied to the entity it is casting the shadow, and secondly, the ...
4
votes
2answers
204 views

How can I simulate multiple depth channels?

Here's what I'd like to achieve: Rendering a first pass of objects in my scene, using standard depth comparison Rendering another pass of objects in the same scene, but with the following rules: A ...
3
votes
1answer
4k views

How can I write only to the stencil buffer in OpenGL ES 2.0?

I'd like to write to the stencil buffer without incurring the cost of my expensive shaders. As I understand it, I write to the stencil buffer as a 'side effect' of rendering something. In this first ...