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How to get updated buffer attributes in Threejs
Updating ShaderMaterial attribute in three.jsGeometries on vertex of BufferGeometry in Three.jsThree.js BufferGeometry.toJSON - Why are the Attribute data not exported?ThreeJS: PlaneBufferGeometry, raycasting and facesTHREE.JS glDrawElements: attempt to access out of range vertices in attribute 1Three.js BufferGeometry face colors blurringGetting the vertex coordinate of a BufferGeometry transformed in vertex shaderThree.js indexed BufferGeometry vs. InstancedBufferGeometryTHREEJS - Indexed BufferGeometry with 2 materialsTHREEJS - Buffer geometry with custom UV mapping
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When i apply a matrix to a buffergeometry
I want to get the updated position attributes fast , i am dealing with 1000000+ vertex .
I have tried Matrix4.applyToBufferAttribute() , but the buffer attribute is still the same
What is the most proper way to perform this ?
three.js
asked Mar 27 at 9:02
Rayan ArfawiRayan Arfawi
34 bronze badges
add a comment |
When i apply a matrix to a buffergeometry
I want to get the updated position attributes fast , i am dealing with 1000000+ vertex .
I have tried Matrix4.applyToBufferAttribute() , but the buffer attribute is still the same
What is the most proper way to perform this ?
three.js
asked Mar 27 at 9:02
Rayan ArfawiRayan Arfawi
34 bronze badges
add a comment |
When i apply a matrix to a buffergeometry
I want to get the updated position attributes fast , i am dealing with 1000000+ vertex .
I have tried Matrix4.applyToBufferAttribute() , but the buffer attribute is still the same
What is the most proper way to perform this ?
three.js
asked Mar 27 at 9:02
Rayan ArfawiRayan Arfawi
34 bronze badges
When i apply a matrix to a buffergeometry
I want to get the updated position attributes fast , i am dealing with 1000000+ vertex .
I have tried Matrix4.applyToBufferAttribute() , but the buffer attribute is still the same
What is the most proper way to perform this ?
three.js
three.js
asked Mar 27 at 9:02
Rayan ArfawiRayan Arfawi
34 bronze badges
asked Mar 27 at 9:02
Rayan ArfawiRayan Arfawi
34 bronze badges
asked Mar 27 at 9:02
Rayan ArfawiRayan Arfawi
34 bronze badges
asked Mar 27 at 9:02
Rayan ArfawiRayan Arfawi
34 bronze badges
asked Mar 27 at 9:02
Rayan ArfawiRayan Arfawi
34 bronze badges
34 bronze badges
add a comment |
add a comment |
1 Answer
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I have tried Matrix4.applyToBufferAttribute() , but the buffer attribute is still the same
Then it seems you are doing something wrong in your application. Matrix4.applyToBufferAttribute() does apply the matrix to the given attribute. The method is used multiple times in the core of three.js for example in BufferGeometry.applyMatrix():
https://github.com/mrdoob/three.js/blob/9f7f38b543c8a51d5614b72c04d657a4cfad68da/src/core/BufferGeometry.js#L141-L142
Ensure to set BufferAttribute.needsUpdate to true after the method invocation. And yes, it's the intended way to apply a 4x4 transformation matrix to a buffer attribute.
answered Mar 27 at 9:24
Mugen87Mugen87
5,4812 gold badges6 silver badges25 bronze badges
Does theBufferAttribute.needsUpdate = truechange the buffer in the gpu ?
– Rayan Arfawi
Mar 27 at 10:47
Correct. When set totrue, it indicates the engine to update the actual WebGL buffer.
– Mugen87
Mar 27 at 10:47
when i logmeshes[1].applyMatrix(mat);before it and after it i get the same values sameMesh.matrix, sameMesh.geometry.attributes.position, is this normal ?
– Rayan Arfawi
Mar 28 at 6:33
Mesh.matrixshould be identical. The attribute data should actually change. Can you please demonstrate the issue with a live example?
– Mugen87
Mar 28 at 10:57
add a comment |
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I have tried Matrix4.applyToBufferAttribute() , but the buffer attribute is still the same
Then it seems you are doing something wrong in your application. Matrix4.applyToBufferAttribute() does apply the matrix to the given attribute. The method is used multiple times in the core of three.js for example in BufferGeometry.applyMatrix():
https://github.com/mrdoob/three.js/blob/9f7f38b543c8a51d5614b72c04d657a4cfad68da/src/core/BufferGeometry.js#L141-L142
Ensure to set BufferAttribute.needsUpdate to true after the method invocation. And yes, it's the intended way to apply a 4x4 transformation matrix to a buffer attribute.
answered Mar 27 at 9:24
Mugen87Mugen87
5,4812 gold badges6 silver badges25 bronze badges
Does theBufferAttribute.needsUpdate = truechange the buffer in the gpu ?
– Rayan Arfawi
Mar 27 at 10:47
Correct. When set totrue, it indicates the engine to update the actual WebGL buffer.
– Mugen87
Mar 27 at 10:47
when i logmeshes[1].applyMatrix(mat);before it and after it i get the same values sameMesh.matrix, sameMesh.geometry.attributes.position, is this normal ?
– Rayan Arfawi
Mar 28 at 6:33
Mesh.matrixshould be identical. The attribute data should actually change. Can you please demonstrate the issue with a live example?
– Mugen87
Mar 28 at 10:57
add a comment |
I have tried Matrix4.applyToBufferAttribute() , but the buffer attribute is still the same
Then it seems you are doing something wrong in your application. Matrix4.applyToBufferAttribute() does apply the matrix to the given attribute. The method is used multiple times in the core of three.js for example in BufferGeometry.applyMatrix():
https://github.com/mrdoob/three.js/blob/9f7f38b543c8a51d5614b72c04d657a4cfad68da/src/core/BufferGeometry.js#L141-L142
Ensure to set BufferAttribute.needsUpdate to true after the method invocation. And yes, it's the intended way to apply a 4x4 transformation matrix to a buffer attribute.
answered Mar 27 at 9:24
Mugen87Mugen87
5,4812 gold badges6 silver badges25 bronze badges
Does theBufferAttribute.needsUpdate = truechange the buffer in the gpu ?
– Rayan Arfawi
Mar 27 at 10:47
Correct. When set totrue, it indicates the engine to update the actual WebGL buffer.
– Mugen87
Mar 27 at 10:47
when i logmeshes[1].applyMatrix(mat);before it and after it i get the same values sameMesh.matrix, sameMesh.geometry.attributes.position, is this normal ?
– Rayan Arfawi
Mar 28 at 6:33
Mesh.matrixshould be identical. The attribute data should actually change. Can you please demonstrate the issue with a live example?
– Mugen87
Mar 28 at 10:57
add a comment |
I have tried Matrix4.applyToBufferAttribute() , but the buffer attribute is still the same
Then it seems you are doing something wrong in your application. Matrix4.applyToBufferAttribute() does apply the matrix to the given attribute. The method is used multiple times in the core of three.js for example in BufferGeometry.applyMatrix():
https://github.com/mrdoob/three.js/blob/9f7f38b543c8a51d5614b72c04d657a4cfad68da/src/core/BufferGeometry.js#L141-L142
Ensure to set BufferAttribute.needsUpdate to true after the method invocation. And yes, it's the intended way to apply a 4x4 transformation matrix to a buffer attribute.
answered Mar 27 at 9:24
Mugen87Mugen87
5,4812 gold badges6 silver badges25 bronze badges
I have tried Matrix4.applyToBufferAttribute() , but the buffer attribute is still the same
Then it seems you are doing something wrong in your application. Matrix4.applyToBufferAttribute() does apply the matrix to the given attribute. The method is used multiple times in the core of three.js for example in BufferGeometry.applyMatrix():
https://github.com/mrdoob/three.js/blob/9f7f38b543c8a51d5614b72c04d657a4cfad68da/src/core/BufferGeometry.js#L141-L142
Ensure to set BufferAttribute.needsUpdate to true after the method invocation. And yes, it's the intended way to apply a 4x4 transformation matrix to a buffer attribute.
answered Mar 27 at 9:24
Mugen87Mugen87
5,4812 gold badges6 silver badges25 bronze badges
edited Mar 27 at 10:44
answered Mar 27 at 9:24
Mugen87Mugen87
5,4812 gold badges6 silver badges25 bronze badges
answered Mar 27 at 9:24
Mugen87Mugen87
5,4812 gold badges6 silver badges25 bronze badges
answered Mar 27 at 9:24
Mugen87Mugen87
5,4812 gold badges6 silver badges25 bronze badges
5,4812 gold badges6 silver badges25 bronze badges
Does theBufferAttribute.needsUpdate = truechange the buffer in the gpu ?
– Rayan Arfawi
Mar 27 at 10:47
Correct. When set totrue, it indicates the engine to update the actual WebGL buffer.
– Mugen87
Mar 27 at 10:47
when i logmeshes[1].applyMatrix(mat);before it and after it i get the same values sameMesh.matrix, sameMesh.geometry.attributes.position, is this normal ?
– Rayan Arfawi
Mar 28 at 6:33
Mesh.matrixshould be identical. The attribute data should actually change. Can you please demonstrate the issue with a live example?
– Mugen87
Mar 28 at 10:57
add a comment |
Does theBufferAttribute.needsUpdate = truechange the buffer in the gpu ?
– Rayan Arfawi
Mar 27 at 10:47
Correct. When set totrue, it indicates the engine to update the actual WebGL buffer.
– Mugen87
Mar 27 at 10:47
when i logmeshes[1].applyMatrix(mat);before it and after it i get the same values sameMesh.matrix, sameMesh.geometry.attributes.position, is this normal ?
– Rayan Arfawi
Mar 28 at 6:33
Mesh.matrixshould be identical. The attribute data should actually change. Can you please demonstrate the issue with a live example?
– Mugen87
Mar 28 at 10:57
Does the
BufferAttribute.needsUpdate = true change the buffer in the gpu ?– Rayan Arfawi
Mar 27 at 10:47
Does the
BufferAttribute.needsUpdate = true change the buffer in the gpu ?– Rayan Arfawi
Mar 27 at 10:47
Correct. When set to
true, it indicates the engine to update the actual WebGL buffer.– Mugen87
Mar 27 at 10:47
Correct. When set to
true, it indicates the engine to update the actual WebGL buffer.– Mugen87
Mar 27 at 10:47
when i log
meshes[1].applyMatrix(mat); before it and after it i get the same values same Mesh.matrix , same Mesh.geometry.attributes.position , is this normal ?– Rayan Arfawi
Mar 28 at 6:33
when i log
meshes[1].applyMatrix(mat); before it and after it i get the same values same Mesh.matrix , same Mesh.geometry.attributes.position , is this normal ?– Rayan Arfawi
Mar 28 at 6:33
Mesh.matrix should be identical. The attribute data should actually change. Can you please demonstrate the issue with a live example?– Mugen87
Mar 28 at 10:57
Mesh.matrix should be identical. The attribute data should actually change. Can you please demonstrate the issue with a live example?– Mugen87
Mar 28 at 10:57
add a comment |
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