make mat4 from vec4

make_mat4_from_vec4.glsl

uniform vec4 uniformBuffer[9];

void main() {
	mat4 matV = mat4(uniformBuffer[0], uniformBuffer[1], uniformBuffer[2], uniformBuffer[3]);
	mat4 matP = mat4(uniformBuffer[4], uniformBuffer[5], uniformBuffer[6], uniformBuffer[7]);

	float etc1 = uniformBuffer[8].x;
	float etc2 = uniformBuffer[8].y;
	float etc3 = uniformBuffer[8].z;
}

write_uniform_into_vec4s.cpp

struct UniformBuffer
{
	Mat matP, matV;
	float etc1, etc2, etc3, padding;
};
static UniformBuffer buf;

void Write()
{
	glUniform4fv(glGetUniformLocation(shaderId, "uniformBuffer"), sizeof(buf) / (sizeof(GLfloat) * 4), (GLfloat*)&buf);
}