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opengl es - THREEJS : Vertex Color Baking
    When coloring a mesh using vertex coloration, how does one save the colors as a texture? For example, if ... this mesh has texture coordinates. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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opengl - Why do different variations of glVertexAttribPointer exist?
    There are glVertexAttribPointer() glVertexAttribIPointer() glVertexAttribLPointer() As far as I know, ... variations exist? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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opengl es - What's up with CITemperatureAndTint having vector inputs?
    OK, so the Core Image filter Temperature and Tint has two inputs, neutral and targetNeutral. However, my biggest ... would the vector be for? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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opengl - Linker error : undefined reference to symbol 'glOrtho'
    I installed OpenGL packages in Ubuntu 13.04 ( *mesa-common-dev freeglut3-dev* ) and tried to run a ... development environment in Ubuntu Linux See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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opengl - 3D Ray Picking use Mouse Coordinates when Mouse isn't locked
    So basically I've made a program using OpenGL which can perform 3D Ray Picking. If the Camera View Direction Ray ... ), position_far.get(2))); See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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opengl - Depth as distance to camera plane in GLSL
    I have a pair of GLSL shaders that give me the depth map of the objects in my scene. What I get now is the ... depth, depth, depth, 1.0); } See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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opengl - How can I pass multiple textures to a single shader?
    I am using freeglut, GLEW and DevIL to render a textured teapot using a vertex and fragment shader. This is all ... anyone have a tea cosy mesh? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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744 views
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opengl - texturing a glutSolidSphere
    I need to add an earth texture to a glutSolidSphere. The problem is that I cannot figure out how to ... to properly texture a glutSolidSphere? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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opengl es - what is wrong when i use Eglimage replace glreadpixels in NDK program?
    //step 2. Create the Android Graphic Buffer GraphicBuffer* buffer = new GraphicBuffer(w, h, HAL_PIXEL_FORMAT_RGBA_8888, ... the result is right See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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opengl - Confusion with GL_MAX_TEXTURE_SIZE
    I would like to know if GL_MAX_TEXTURE_SIZE variant returns the texture pixel dimensions for one axis or both added up ... of video memory ?? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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516 views
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opengl es - 'could not get wglGetExtensionsStringARB' for Android Emulator
    Actually I have a problem with my Android application in eclipse. When I run my program, it gives ... could not get wglGetExtensionsStringARB See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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703 views
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opengl - What is the purpose of GL_COLOR_BUFFER_BIT and GL_DEPTH_BUFFER_BIT?
    As an OpenGL beginner I would like to know what do they do and why these are required. ... glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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opengl - Why clipping should be done in CCS, not NDCS
    Why clipping should be done in CCS, not NDCS. I think it is easier to clip in NDCS, but many book said ... understand why it can be a problem. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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548 views
1 answer
opengl - How do I run the Android Emulator after a Build?
    So I have download the source code successfully, built it successfully, and can run the emulator successfully. ... around the emulator window. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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608 views
1 answer
opengl - gl_PointSize Corresponding to World Space Size
    If you want to render an imposter geometry (say like a sphere), then the standard practice is to draw it using ... anyone know how to do this? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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593 views
1 answer
opengl - Field of view + Aspect Ratio + View Matrix from Projection Matrix (HMD OST Calibration)
    I'm currently working on an Augmented reality application. The targetted device being an Optical See-though HMD I ... first matrix I have ? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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461 views
1 answer
opengl - Does interleaving in VBOs speed up performance when using VAOs
    You usually get a speed up when you use interleaved VBOs instead of using multiple VBOs. Is this also valid when ... one VBO in multiple VAOs. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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765 views
1 answer
opengl - Unity Shader highlighting overlaps
    I am trying to write a shader for unity that will highlight the overlapping fragments of meshes. It should ... looks like an attached image See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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754 views
1 answer
opengl - Omnidirectional shadow mapping with depth cubemap
    I'm working with omnidirectional point lights. I already implemented shadow mapping using a cubemap texture as ... being my actual problem. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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592 views
1 answer
opengl - Rendering to cube map
    According to ARB_geometry_shader4 it is possible to render a scene onto the 6 faces of a cube map with a geometry ... ) support depth cube maps. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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958 views
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opengl - glsl sampler2DShadow and shadow2D clarification
    Quick background of where I'm at (to make sure we're on the same page, and sanity check if I'm missing/ ... is going on with shadow2D! Thanks! See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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920 views
1 answer
opengl es - Is it possible to draw line thickness in a fragment shader?
    Is it possible for me to add line thickness in the fragment shader considering that I draw the line with GL_LINES ... , example, would be great. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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614 views
1 answer
opengl - volume rendering (using glsl) with ray casting algorithm
    I am learning volume rendering using ray casting algorithm. I have found a good demo and tuturial ... ) with glsl:Volume_Rendering_Using_GLSL See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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676 views
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opengl - When should glVertexAttribPointer be called?
    It's not obvious from the documentation when glVertexAttribPointer should be called. It looks like it's part of ... a call to glBindBuffer)? See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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705 views
1 answer
opengl - No spot of light on cube
    I have made three sources of light and one cube I don't see a spot of light on faces. It's ... glLightf(GL_LIGHT2, GL_SPOT_EXPONENT, 15.0f); See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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819 views
1 answer
opengl - Warning: corrupt .drectve at end of def file
    I installed glew, glfw and glm in eclipse cdt(c++) with the gcc/mingw, all statically. All works fine, but ... I call the 'glewInit' function. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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549 views
1 answer
opengl z-sorting transparency
    im rendering png's on simple squares in opengl es 2.0, but when i try and draw something ... glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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620 views
1 answer
opengl - Can I pack both floats and ints into the same array buffer?
    ...because the floats seem to be coming out fine, but there's something wrong with the ints. Essentially I have ... s probably a multiple of 16. See Question&Answers more detail:os...
asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)
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