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## Mat3
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3x3 floating point matrix
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### Declaration
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```glsl
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mat3 aMat3 = mat3(1.0, 0.0, 0.0, // 1. column
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0.0, 1.0, 0.0, // 2. column
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0.0, 0.0, 1.0); // 3. column
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mat3 bMat3 = mat3(1.0);
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mat3 cMat3 = mat3(aVec3, bVec3, cVec3);
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mat3 dMat3 = mat3(aVec4, aVec3, bVec4, aFloat);
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```
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### Description
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```mat3``` data type is compose for a 3x3 matrix of floating point. As you can see above, can be initialize in different ways:
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- Providing a value for each component column by column.
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- Providing one value that is used for the components on the main diagonal.
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- Providing a combination of vectors and scalars.
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In the same way data can be accessed component-wise or column by column:
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```glsl
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mat3 aMat3;
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aMat3[2][2] = 1.0;
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float aFloat = aMat3[2][2];
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aMat3[0] = vec3(1.0);
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vec3 aVec3 = aMat3[0];
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```
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### See Also
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[mat2](/glossary/?search=mat2), [mat4](/glossary/?search=mat4), [matrixCompMult()](/glossary/?search=matrixCompMult)
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