mirror of
https://github.com/patriciogonzalezvivo/thebookofshaders
synced 2024-11-08 01:10:27 +00:00
35 lines
879 B
Markdown
35 lines
879 B
Markdown
## Mat2
|
|
2x2 floating point matrix
|
|
|
|
### Declaration
|
|
```glsl
|
|
mat2 aMat2 = mat2(1.0, 0.0, // 1. column
|
|
0.0, 1.0); // 2. column
|
|
mat2 bMat2 = mat2(1.0);
|
|
mat2 cMat2 = mat2(aVec2, bVec2);
|
|
mat2 dMat2 = mat2(aVec3, aFloat);
|
|
```
|
|
|
|
### Description
|
|
```mat2``` data type is compose for a 2x2 matrix of floating point. As you can see above, can be initialize in different ways:
|
|
|
|
- Providing a value for each component column by column.
|
|
|
|
- Providing one value that is used for the components on the main diagonal.
|
|
|
|
- Providing a combination of vectors and scalars.
|
|
|
|
In the same way data can be accessed component-wise or column by column:
|
|
|
|
```glsl
|
|
mat2 aMat2;
|
|
aMat2[1][1] = 1.0;
|
|
float aFloat = aMat2[1][1];
|
|
|
|
aMat2[0] = vec2(1.0);
|
|
vec2 aVec2 = aMat2[0];
|
|
```
|
|
|
|
### See Also
|
|
[mat3](index.html#mat3.md), [mat4](index.html#mat4.md), [matrixCompMult()](index.html#matrixCompMult.md)
|