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Author Topic: glm::mat4 in setUniform?  (Read 2901 times)

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scottyaim

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glm::mat4 in setUniform?
« on: October 07, 2016, 10:33:24 pm »
Hi, I am trying to load a glm::mat4 into a shader but there are no overloads for glm::mat4 in shader.setUniform().

Is there any why to upload a glm::mat4 into a uniform with shader.setUniform()?

dabbertorres

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Re: glm::mat4 in setUniform?
« Reply #1 on: October 08, 2016, 06:45:07 am »
Because SFML isn't GLM?

You'll need to pass it as a sf::Glsl::Mat4.

scottyaim

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Re: glm::mat4 in setUniform?
« Reply #2 on: October 09, 2016, 01:16:49 pm »
Because SFML isn't GLM?

You'll need to pass it as a sf::Glsl::Mat4.

Okay i see. What is an easy why to pass a glm::mat4 for into a Glsl::mat4?

Laurent

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Re: glm::mat4 in setUniform?
« Reply #3 on: October 09, 2016, 01:54:26 pm »
It's not that hard, just look at the documentation.

Quote
The matrix can be constructed from an array with 4x4
elements, aligned in column-major order. For example,
a translation by (x, y, z) looks as follows:

float array[16] =
{
    1, 0, 0, 0,
    0, 1, 0, 0,
    0, 0, 1, 0,
    x, y, z, 1
};
sf::Glsl::Mat4 matrix(array);

And then in glm::mat4 you have glm::value_ptr to get a float* out of a glm::mat4.
Laurent Gomila - SFML developer

scottyaim

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Re: glm::mat4 in setUniform?
« Reply #4 on: October 09, 2016, 02:50:57 pm »
It's not that hard, just look at the documentation.

Quote
The matrix can be constructed from an array with 4x4
elements, aligned in column-major order. For example,
a translation by (x, y, z) looks as follows:

float array[16] =
{
    1, 0, 0, 0,
    0, 1, 0, 0,
    0, 0, 1, 0,
    x, y, z, 1
};
sf::Glsl::Mat4 matrix(array);

And then in glm::mat4 you have glm::value_ptr to get a float* out of a glm::mat4.

Thank you that solved it!

 

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