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Load float array with 3D texture?
Why are the GLSL texture-coordinates in my shader not linear?How to bind 2 textures correctlyGLSL Reading From Sampler3d textureopengl 3.1 textures not loadingCreate and use floating point texture in OpenGLOpenGL: Mapping texture on a sphere using spherical coordinatesOpenGL Bindless Textures: Bind to uniform sampler2D arrayWhat am I doing wrong, in regards to multi-texture(OpenGL)?Pass texture with float values to shaderStore array of floats in texture & access the floats from the shader using texture coordinates
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
i have a float array with intensity value, i need load this array as 3d texture in opengl, and in the fragment shader read this as red color (float sample= texture(cord,volumeText).r).
the size of array is 256*256*256, and the intensity value are between 0.0 to 256.0.
this is a sample of intensity values:
75.839354473071637,
64.083049468866022,
65.253933716444365,
79.992431196592577,
84.411485976957096,
0.0000000000000000,
82.020319431382831,
76.808403454586994,
79.974774618246158,
0.0000000000000000,
91.127273013466336,
84.009956557448433,
90.221356094672814,
87.567422484025627,
71.940263118478072,
0.0000000000000000,
0.0000000000000000,
74.487058398181944,
..................,
..................
opengl glsl textures
edited Mar 28 at 19:36
Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
asked Mar 28 at 19:00
sebastian pintosebastian pinto
296 bronze badges
add a comment
|
i have a float array with intensity value, i need load this array as 3d texture in opengl, and in the fragment shader read this as red color (float sample= texture(cord,volumeText).r).
the size of array is 256*256*256, and the intensity value are between 0.0 to 256.0.
this is a sample of intensity values:
75.839354473071637,
64.083049468866022,
65.253933716444365,
79.992431196592577,
84.411485976957096,
0.0000000000000000,
82.020319431382831,
76.808403454586994,
79.974774618246158,
0.0000000000000000,
91.127273013466336,
84.009956557448433,
90.221356094672814,
87.567422484025627,
71.940263118478072,
0.0000000000000000,
0.0000000000000000,
74.487058398181944,
..................,
..................
opengl glsl textures
edited Mar 28 at 19:36
Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
asked Mar 28 at 19:00
sebastian pintosebastian pinto
296 bronze badges
It is not exactly clear what precision requirements you have.
– derhass
Mar 28 at 20:27
add a comment
|
i have a float array with intensity value, i need load this array as 3d texture in opengl, and in the fragment shader read this as red color (float sample= texture(cord,volumeText).r).
the size of array is 256*256*256, and the intensity value are between 0.0 to 256.0.
this is a sample of intensity values:
75.839354473071637,
64.083049468866022,
65.253933716444365,
79.992431196592577,
84.411485976957096,
0.0000000000000000,
82.020319431382831,
76.808403454586994,
79.974774618246158,
0.0000000000000000,
91.127273013466336,
84.009956557448433,
90.221356094672814,
87.567422484025627,
71.940263118478072,
0.0000000000000000,
0.0000000000000000,
74.487058398181944,
..................,
..................
opengl glsl textures
edited Mar 28 at 19:36
Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
asked Mar 28 at 19:00
sebastian pintosebastian pinto
296 bronze badges
i have a float array with intensity value, i need load this array as 3d texture in opengl, and in the fragment shader read this as red color (float sample= texture(cord,volumeText).r).
the size of array is 256*256*256, and the intensity value are between 0.0 to 256.0.
this is a sample of intensity values:
75.839354473071637,
64.083049468866022,
65.253933716444365,
79.992431196592577,
84.411485976957096,
0.0000000000000000,
82.020319431382831,
76.808403454586994,
79.974774618246158,
0.0000000000000000,
91.127273013466336,
84.009956557448433,
90.221356094672814,
87.567422484025627,
71.940263118478072,
0.0000000000000000,
0.0000000000000000,
74.487058398181944,
..................,
..................
opengl glsl textures
opengl glsl textures
edited Mar 28 at 19:36
Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
asked Mar 28 at 19:00
sebastian pintosebastian pinto
296 bronze badges
edited Mar 28 at 19:36
Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
asked Mar 28 at 19:00
sebastian pintosebastian pinto
296 bronze badges
edited Mar 28 at 19:36
Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
edited Mar 28 at 19:36
Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
edited Mar 28 at 19:36
Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
61.1k14 gold badges40 silver badges73 bronze badges
asked Mar 28 at 19:00
sebastian pintosebastian pinto
296 bronze badges
asked Mar 28 at 19:00
sebastian pintosebastian pinto
296 bronze badges
asked Mar 28 at 19:00
sebastian pintosebastian pinto
296 bronze badges
296 bronze badges
It is not exactly clear what precision requirements you have.
– derhass
Mar 28 at 20:27
add a comment
|
It is not exactly clear what precision requirements you have.
– derhass
Mar 28 at 20:27
It is not exactly clear what precision requirements you have.
– derhass
Mar 28 at 20:27
It is not exactly clear what precision requirements you have.
– derhass
Mar 28 at 20:27
add a comment
|
1 Answer
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To load a texture like this you can use the input format GL_RED and type GL_FLOAT. A proper sized internal format for is GL_R16F. See glTexImage3D:
glTexImage3D(GL_TEXTURE_3D, 0, GL_R16F, 256, 256, 256, 0, GL_RED, GL_FLOAT, dataPtr)
The internal format GL_R16F is a floating point format. This means when you read the red color channel (.r) from the texture in the fragment shader, then the values are still in range [0.0, 256.0].
answered Mar 28 at 19:32
Rabbid76Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
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To load a texture like this you can use the input format GL_RED and type GL_FLOAT. A proper sized internal format for is GL_R16F. See glTexImage3D:
glTexImage3D(GL_TEXTURE_3D, 0, GL_R16F, 256, 256, 256, 0, GL_RED, GL_FLOAT, dataPtr)
The internal format GL_R16F is a floating point format. This means when you read the red color channel (.r) from the texture in the fragment shader, then the values are still in range [0.0, 256.0].
answered Mar 28 at 19:32
Rabbid76Rabbid76
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To load a texture like this you can use the input format GL_RED and type GL_FLOAT. A proper sized internal format for is GL_R16F. See glTexImage3D:
glTexImage3D(GL_TEXTURE_3D, 0, GL_R16F, 256, 256, 256, 0, GL_RED, GL_FLOAT, dataPtr)
The internal format GL_R16F is a floating point format. This means when you read the red color channel (.r) from the texture in the fragment shader, then the values are still in range [0.0, 256.0].
answered Mar 28 at 19:32
Rabbid76Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
add a comment
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To load a texture like this you can use the input format GL_RED and type GL_FLOAT. A proper sized internal format for is GL_R16F. See glTexImage3D:
glTexImage3D(GL_TEXTURE_3D, 0, GL_R16F, 256, 256, 256, 0, GL_RED, GL_FLOAT, dataPtr)
The internal format GL_R16F is a floating point format. This means when you read the red color channel (.r) from the texture in the fragment shader, then the values are still in range [0.0, 256.0].
answered Mar 28 at 19:32
Rabbid76Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
To load a texture like this you can use the input format GL_RED and type GL_FLOAT. A proper sized internal format for is GL_R16F. See glTexImage3D:
glTexImage3D(GL_TEXTURE_3D, 0, GL_R16F, 256, 256, 256, 0, GL_RED, GL_FLOAT, dataPtr)
The internal format GL_R16F is a floating point format. This means when you read the red color channel (.r) from the texture in the fragment shader, then the values are still in range [0.0, 256.0].
answered Mar 28 at 19:32
Rabbid76Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
answered Mar 28 at 19:32
Rabbid76Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
answered Mar 28 at 19:32
Rabbid76Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
answered Mar 28 at 19:32
Rabbid76Rabbid76
61.1k14 gold badges40 silver badges73 bronze badges
61.1k14 gold badges40 silver badges73 bronze badges
add a comment
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add a comment
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It is not exactly clear what precision requirements you have.
– derhass
Mar 28 at 20:27