C++ Implementation

[UFBPREMIUM]

Hi, im a beginner in panda3d and trying to implement your code to c++. Im trying to make my own terrain load system. (Iike your editor) (and the editor is amazing thanks for this). Here is some example for py->c++;

def setupTerrain(path, detail_map1, detail_map2, height_map):
mesh=loader.loadModel(path+'data/mesh80k.bam')
mesh.reparentTo(render)
mesh.setShader(Shader.load(Shader.SLGLSL, path+"shaders/terrain_v.glsl", path+"shaders/terrain_f.glsl"))
h_map=loader.loadTexture(height_map)
h_map.setWrapU(Texture.WMClamp)
h_map.setWrapV(Texture.WMClamp)
mesh.setShaderInput("height", h_map)
mesh.setShaderInput("atr1", loader.loadTexture(detail_map1))
mesh.setShaderInput("atr2", loader.loadTexture(detail_map2))
render.setShaderInput("z_scale", 100.0)
mesh.setShaderInput("tex_scale", 16.0)
mesh.setTransparency(TransparencyAttrib.MNone)
mesh.node().setBounds(OmniBoundingVolume())
mesh.node().setFinal(1)
mesh.setBin("background", 11)
#mesh.setShaderInput("water_level",26.0)
return mesh

void Background::setupTerrain(string detail_map1, string detail_map2, string height_map) {
NodePath mesh = Engine::loadModel("mesh", "bin/neuera/models/mesh80k.bam");
mesh.reparent_to(window->get_render());
mesh.set_shader(Shader::load(Shader::SL_GLSL, "bin/neuera/shaders/terrain_v.glsl", "bin/neuera/shaders/terrain_f.glsl"));
Texture* h_map = Engine::loadTexture(height_map);
h_map->set_wrap_u(SamplerState::WM_clamp);
h_map->set_wrap_v(SamplerState::WM_clamp);
mesh.set_shader_input("height", h_map);
mesh.set_shader_input("atr1", Engine::loadTexture(detail_map1));
mesh.set_shader_input("atr2", Engine::loadTexture(detail_map2));
window->get_render().set_shader_input("z_scale",LVecBase2i(100.0));
mesh.set_shader_input("tex_scale", LVecBase2i(16.0));
mesh.set_transparency(TransparencyAttrib::M_none);
PT(OmniBoundingVolume) omni = new OmniBoundingVolume();
mesh.get_node(0)->set_bounds(omni);
mesh.get_node(0)->set_final(true);
mesh.set_bin("background", 11);
}

But when i tried, i have only flat mesh (i have heightmap.png);

Also i got this shader error even file is there;

Thanks for your time and sorry for my english..