4.3
I noticed that the Input node’s “NodePositionWorld” only gives the world position of the object rather than each fragment position.
You need to use the depth buffer, to undo the screen space transform of the fragment.
These nodes?
That looks like it should work. Although since you say it doesn’t work, I wonder if Godot 4.3 reverse Z buffer change broke it.
… Yeah it could be calculating the depth wrong I don’t see a commit to update it when it was integrated.
It does say here if the underlying shader uses the projection matrix to transform the depth texture it should be okay.
}
bool VisualShaderNodeWorldPositionFromDepth::has_output_port_preview(int p_port) const {
return false;
}
String VisualShaderNodeWorldPositionFromDepth::generate_global(Shader::Mode p_mode, VisualShader::Type p_type, int p_id) const {
return "uniform sampler2D " + make_unique_id(p_type, p_id, "depth_tex") + " : hint_depth_texture, repeat_disable, filter_nearest;\n";
}
String VisualShaderNodeWorldPositionFromDepth::generate_code(Shader::Mode p_mode, VisualShader::Type p_type, int p_id, const String *p_input_vars, const String *p_output_vars, bool p_for_preview) const {
String code;
String uv = p_input_vars[0].is_empty() ? "SCREEN_UV" : p_input_vars[0];
code += " {\n";
code += " float __log_depth = textureLod(" + make_unique_id(p_type, p_id, "depth_tex") + ", " + uv + ", 0.0).x;\n";
if (!RenderingServer::get_singleton()->is_low_end()) {
code += " vec4 __depth_view = INV_PROJECTION_MATRIX * vec4(" + uv + " * 2.0 - 1.0, __log_depth, 1.0);\n";
} else {
code += " vec4 __depth_view = INV_PROJECTION_MATRIX * vec4(vec3(" + uv + ", __log_depth) * 2.0 - 1.0, 1.0);\n";
}
