How to cast a CMRotationMatrix into a float4x4?
I am building a Metal app that uses float4x4 matrices to rotate 3D objects and/or the world view.
The app is also reading the device attitude that can be expressed as a rotation matrix in the CMRotationMatrix format (CoreMotion).
How can I cast my attitude.rotationMatrix into a float4x4 object?
ios swift metal core-motion
asked Nov 24 '18 at 18:23
Ze JibeZe Jibe
6471724
add a comment |
I am building a Metal app that uses float4x4 matrices to rotate 3D objects and/or the world view.
The app is also reading the device attitude that can be expressed as a rotation matrix in the CMRotationMatrix format (CoreMotion).
How can I cast my attitude.rotationMatrix into a float4x4 object?
ios swift metal core-motion
asked Nov 24 '18 at 18:23
Ze JibeZe Jibe
6471724
Keep in mind thatCMRotationMatrixis a 3x3 matrix whilefloat4x4is obviously a 4x4 matrix.
– rmaddy
Nov 24 '18 at 22:38
add a comment |
I am building a Metal app that uses float4x4 matrices to rotate 3D objects and/or the world view.
The app is also reading the device attitude that can be expressed as a rotation matrix in the CMRotationMatrix format (CoreMotion).
How can I cast my attitude.rotationMatrix into a float4x4 object?
ios swift metal core-motion
asked Nov 24 '18 at 18:23
Ze JibeZe Jibe
6471724
I am building a Metal app that uses float4x4 matrices to rotate 3D objects and/or the world view.
The app is also reading the device attitude that can be expressed as a rotation matrix in the CMRotationMatrix format (CoreMotion).
How can I cast my attitude.rotationMatrix into a float4x4 object?
ios swift metal core-motion
ios swift metal core-motion
asked Nov 24 '18 at 18:23
Ze JibeZe Jibe
6471724
asked Nov 24 '18 at 18:23
Ze JibeZe Jibe
6471724
asked Nov 24 '18 at 18:23
Ze JibeZe Jibe
6471724
asked Nov 24 '18 at 18:23
Ze JibeZe Jibe
6471724
asked Nov 24 '18 at 18:23
Ze JibeZe Jibe
6471724
6471724
Keep in mind thatCMRotationMatrixis a 3x3 matrix whilefloat4x4is obviously a 4x4 matrix.
– rmaddy
Nov 24 '18 at 22:38
add a comment |
Keep in mind thatCMRotationMatrixis a 3x3 matrix whilefloat4x4is obviously a 4x4 matrix.
– rmaddy
Nov 24 '18 at 22:38
Keep in mind that
CMRotationMatrix is a 3x3 matrix while float4x4 is obviously a 4x4 matrix.– rmaddy
Nov 24 '18 at 22:38
Keep in mind that
CMRotationMatrix is a 3x3 matrix while float4x4 is obviously a 4x4 matrix.– rmaddy
Nov 24 '18 at 22:38
add a comment |
1 Answer
1
active
oldest
votes
You can create an extension that allows you to initialize a float4x4 from the elements of a CMRotationMatrix:
extension float4x4 {
init(_ m: CMRotationMatrix) {
let x = float4(Float(m.m11), Float(m.m21), Float(m.m31), 0)
let y = float4(Float(m.m12), Float(m.m22), Float(m.m32), 0)
let z = float4(Float(m.m13), Float(m.m23), Float(m.m33), 0)
let w = float4( 0, 0, 0, 1)
self.init(columns: (x, y, z, w))
}
}
Using it is as simple as calling the initializer:
let simdMatrix = float4x4(deviceMotion.attitude.rotationMatrix)
This creates a matrix that is suitable for transforming objects whose transformations are expressed relative to the reference attitude frame. You may find that you need to permute the columns so that they match the world coordinate system of your application.
answered Nov 24 '18 at 23:57
warrenmwarrenm
21.6k45585
Works like a charm - thank you!
– Ze Jibe
Nov 25 '18 at 11:36
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53461135%2fhow-to-cast-a-cmrotationmatrix-into-a-float4x4%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You can create an extension that allows you to initialize a float4x4 from the elements of a CMRotationMatrix:
extension float4x4 {
init(_ m: CMRotationMatrix) {
let x = float4(Float(m.m11), Float(m.m21), Float(m.m31), 0)
let y = float4(Float(m.m12), Float(m.m22), Float(m.m32), 0)
let z = float4(Float(m.m13), Float(m.m23), Float(m.m33), 0)
let w = float4( 0, 0, 0, 1)
self.init(columns: (x, y, z, w))
}
}
Using it is as simple as calling the initializer:
let simdMatrix = float4x4(deviceMotion.attitude.rotationMatrix)
This creates a matrix that is suitable for transforming objects whose transformations are expressed relative to the reference attitude frame. You may find that you need to permute the columns so that they match the world coordinate system of your application.
answered Nov 24 '18 at 23:57
warrenmwarrenm
21.6k45585
Works like a charm - thank you!
– Ze Jibe
Nov 25 '18 at 11:36
add a comment |
You can create an extension that allows you to initialize a float4x4 from the elements of a CMRotationMatrix:
extension float4x4 {
init(_ m: CMRotationMatrix) {
let x = float4(Float(m.m11), Float(m.m21), Float(m.m31), 0)
let y = float4(Float(m.m12), Float(m.m22), Float(m.m32), 0)
let z = float4(Float(m.m13), Float(m.m23), Float(m.m33), 0)
let w = float4( 0, 0, 0, 1)
self.init(columns: (x, y, z, w))
}
}
Using it is as simple as calling the initializer:
let simdMatrix = float4x4(deviceMotion.attitude.rotationMatrix)
This creates a matrix that is suitable for transforming objects whose transformations are expressed relative to the reference attitude frame. You may find that you need to permute the columns so that they match the world coordinate system of your application.
answered Nov 24 '18 at 23:57
warrenmwarrenm
21.6k45585
Works like a charm - thank you!
– Ze Jibe
Nov 25 '18 at 11:36
add a comment |
You can create an extension that allows you to initialize a float4x4 from the elements of a CMRotationMatrix:
extension float4x4 {
init(_ m: CMRotationMatrix) {
let x = float4(Float(m.m11), Float(m.m21), Float(m.m31), 0)
let y = float4(Float(m.m12), Float(m.m22), Float(m.m32), 0)
let z = float4(Float(m.m13), Float(m.m23), Float(m.m33), 0)
let w = float4( 0, 0, 0, 1)
self.init(columns: (x, y, z, w))
}
}
Using it is as simple as calling the initializer:
let simdMatrix = float4x4(deviceMotion.attitude.rotationMatrix)
This creates a matrix that is suitable for transforming objects whose transformations are expressed relative to the reference attitude frame. You may find that you need to permute the columns so that they match the world coordinate system of your application.
answered Nov 24 '18 at 23:57
warrenmwarrenm
21.6k45585
You can create an extension that allows you to initialize a float4x4 from the elements of a CMRotationMatrix:
extension float4x4 {
init(_ m: CMRotationMatrix) {
let x = float4(Float(m.m11), Float(m.m21), Float(m.m31), 0)
let y = float4(Float(m.m12), Float(m.m22), Float(m.m32), 0)
let z = float4(Float(m.m13), Float(m.m23), Float(m.m33), 0)
let w = float4( 0, 0, 0, 1)
self.init(columns: (x, y, z, w))
}
}
Using it is as simple as calling the initializer:
let simdMatrix = float4x4(deviceMotion.attitude.rotationMatrix)
This creates a matrix that is suitable for transforming objects whose transformations are expressed relative to the reference attitude frame. You may find that you need to permute the columns so that they match the world coordinate system of your application.
answered Nov 24 '18 at 23:57
warrenmwarrenm
21.6k45585
answered Nov 24 '18 at 23:57
warrenmwarrenm
21.6k45585
answered Nov 24 '18 at 23:57
warrenmwarrenm
21.6k45585
answered Nov 24 '18 at 23:57
warrenmwarrenm
21.6k45585
21.6k45585
Works like a charm - thank you!
– Ze Jibe
Nov 25 '18 at 11:36
add a comment |
Works like a charm - thank you!
– Ze Jibe
Nov 25 '18 at 11:36
Works like a charm - thank you!
– Ze Jibe
Nov 25 '18 at 11:36
Works like a charm - thank you!
– Ze Jibe
Nov 25 '18 at 11:36
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53461135%2fhow-to-cast-a-cmrotationmatrix-into-a-float4x4%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Keep in mind that
CMRotationMatrixis a 3x3 matrix whilefloat4x4is obviously a 4x4 matrix.– rmaddy
Nov 24 '18 at 22:38