bgfx::setViewTransform doesn't work

[yillis]

I have written the following code using bgfx. I used bgfx::setViewTransform to set the view and projection matrices. However, the 'u_modelViewProj' variable in the shader seems to always be 0, indicating that bgfx::setViewTransform doesn't seem to be taking effect. I have also written my own uniform for the MVP matrix and binding it using bgfx::setUniform works correctly. Have I used it incorrectly? Below is my code.

uint32_t width = get_width();
        uint32_t height = get_height();

        bgfx::setViewRect(0, 0, 0, uint16_t(width), uint16_t(height));

        bgfx::touch(0);

        auto model = glm::identity<glm::mat4>();
        const glm::mat4& view = camera.get_view_matrix();
        const glm::mat4& proj = camera.get_project_matrix();

        bgfx::setViewTransform(0, glm::value_ptr(view), glm::value_ptr(proj));
        bgfx::setTransform(glm::value_ptr(model));

        bgfx::setUniform(u_model, glm::value_ptr(model));
        bgfx::setUniform(u_view, glm::value_ptr(view));
        bgfx::setUniform(u_proj, glm::value_ptr(proj));

        bgfx::setVertexBuffer(0, m_vbh);
        bgfx::setIndexBuffer(m_ibh);
        bgfx::setState(BGFX_STATE_WRITE_R
                       | BGFX_STATE_WRITE_G
                       | BGFX_STATE_WRITE_B
                       | BGFX_STATE_WRITE_A);
        bgfx::submit(0, m_program);

// shader
$input a_position, a_color0, a_normal, a_tangent, a_bitangent, a_texcoord0
$output v_color0

/*
 * Copyright 2011-2024 Branimir Karadzic. All rights reserved.
 * License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
 */

#include <bgfx_shader.sh>

uniform vec4 u_campos;
uniform mat4 u_model_;
uniform mat4 u_proj_;
uniform mat4 u_view_;

void main()
{
	gl_Position = mul(u_proj_, mul(u_view_, mul(u_model_, vec4(a_position, 1.0)))); // work
	//gl_Position = mul(u_modelViewProj, vec4(a_position, 1.0)); // error
	v_color0 = vec4(a_normal,1);
}

[bkaradzic]

Almost all examples use u_modelViewProj. Find one example where u_modelViewProj is used and see what's different with your code...