textures

问题 I'm getting this error in Unity 5.4 when trying to download the texture from the server. Here is the code (the link should work): UnityWebRequest www = UnityWebRequest.GetTexture("https://0.gravatar.com/avatar/fc2beef90fad49f83d79650a10b5c030?s=256&d=identicon&r=G"); www.SetRequestHeader("Accept", "image/*"); async = www.Send(); while (!async.isDone) yield return null; if (www.isError) { Debug.Log(www.error); } else { tex = DownloadHandlerTexture.GetContent(www); // <------------------- } The

问题 How to render a texture with alpha? I have a texture, and need to render it with different alpha values at different locations. Any way to do so? (My texture is GL_RGBA) If not possible to change alpha value on the fly, I have to create different textures for different alpha levels? 回答1: Your texture is GL_RGBA so it has a different alpha value for each texel. If you want to change the alpha value used for render, I can think of the following methods: Change the texture alpha values (not sure

问题 I am atempting to draw text to a textured mesh object. The mesh is basically a cube which has been pasted up to the front of the screen. (overall I'm aiming for a menu system). After a bit of googling I've found surprisingly little information on how to draw a text to a texture. I've read that it should be as simple as making a texture, setting it as a render source and then drawing to it, yet I cannot figure this one out. Any ideas, suggestions or skeleton code with the necessary function

问题 I have all of my images for a libgdx project in a single texture. I'm about to add some nice particle effects, but the documentation implies that each type of emitter requires a separate graphics file for its particle. Is that true? Or, is there a way of specifying a region of a texture to be used as the particle image, so that I may still keep all my images in that single file? 回答1: Yes it can but you need to have the texture inside of an TextureAtlas . Take a look at this article for it.

问题 My problem concerns rendering text with OpenGL -- the text is rendered into a texture, and then drawn onto a quad. The trouble is that the pixels on the edge of the texture are drawn partially transparent. The interior of the texture is fine. I'm calculating the texture coordinates to hit the center of my texels, using NEAREST (non-)interpolation, setting the texture wrapping to CLAMP_TO_EDGE, and setting the projection matrix to place my vertices at the center of the viewport pixels. Still

问题 I have a problems in OpenGL with blending (in result of antialiasing or textured painting). See problem illustration: I have the following setup code // Antialiasing glEnable(GL_POINT_SMOOTH); glEnable(GL_LINE_SMOOTH); // Blending glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glEnable(GL_BLEND); // Texture font glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE

问题 I have a problems in OpenGL with blending (in result of antialiasing or textured painting). See problem illustration: I have the following setup code // Antialiasing glEnable(GL_POINT_SMOOTH); glEnable(GL_LINE_SMOOTH); // Blending glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glEnable(GL_BLEND); // Texture font glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE

问题 I'm writing a tiled game board with hexagonal shape tiles using java swing. I'm able to draw polygon with help of this SOF thread. Now I want to add background image to these hexagons and I have totally no idea how to do this. Here is a tutorial that draws background on "Rectangle" but how can I do the same on Hexagon ? 回答1: Create the hexagon using a Shape. Probably a Polygon for this. Set the Shape as a clip for the Graphics2D object. Paint the image. Move the Shape to the next location

问题 I am looking into using bindless textures to rapidly display a series of images. My reference is the OpenGL 4.5 redbook. The book says I can sample bindless textures in a shader with this fragment shader: #version 450 core #extension GL_ARB_bindless_texture : require in FS_INPUTS { vec2 i_texcoord; flat int i_texindex; }; layout (binding = 0) uniform ALL_TEXTURES { sampler2D fs_textures[200]; }; out vec4 color; void main(void) { color = texture(fs_textures[i_texindex], i_texcoord); }; I

问题 My render to texture iPhone code only works if I disable MSAA, otherwise all I get is a black texture. What could be the cause of the problem? Here is my code: glViewport(0,0, target->_Width, target->_Height); glClear(GL_COLOR_BUFFER_BIT Or GL_DEPTH_BUFFER_BIT Or GL_STENCIL_BUFFER_BIT); glBindTexture(GL_TEXTURE_2D, target->_Handle); // render stuff here glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, target->_Width, target->_Height, 0); glBindTexture(GL_TEXTURE_2D, 0); 回答1: Apparently, when