Chams: per-relationship, visible/invisible styles and viewmodel

- Hostile/neutral/friendly each have independent visible and through-wall
  settings: enable, style and colour. Viewmodel has its own enable/style/colour.
- Styles: Flat, Wireframe, Additive, Solid, White, Fullbright, Glow outline.
  Additive uses the model solid material + ADDITIVE flag (the VGUI additive
  was invisible on NPCs). White/fullbright are solid-based, so the viewmodel
  no longer disappears/checkerboards. Glow outline adds a wireframe contour
  pass for depth.
- Config: [chams] active/bind, [chams_hostile|neutral|friendly] vis/inv
  settings, [chams_vm]. GUI sections for each group.

1 files changed, 29 insertions, 10 deletions

diff --git a/src/gui.cpp b/src/gui.cpp
index 9c09bec..3cbb40a 100644
--- a/src/gui.cpp
+++ b/src/gui.cpp
@@ -446,18 +446,37 @@ static void build_cards() {
              "Draw the projectile's damage radius on the ground.", &g_proj_radius);
 
   int chams = add_card(2, &g_chams, "Chams",
-                       "Flat-colour NPC models.", true);
-  add_toggle(chams, "Through walls",
-             "Draw a second pass with the depth test disabled.",
-             &g_chams_walls);
+                       "Per-relationship model colours.", true);
+  static const char *const chams_mat_names[] = {
+      "Flat", "Wireframe", "Additive glow", "Solid", "White", "Fullbright",
+      "Glow outline"};
+  auto add_chams_group = [&](const char *title, ChamsGroup &g) {
+    add_section(chams, title);
+    add_toggle(chams, "Visible", "Draw the normal-depth pass.",
+               &g.vis_on);
+    add_dropdown(chams, "Visible material", "Material for the visible pass.",
+                 chams_mat_names, 7, &g.vis_mat);
+    add_color(chams, "Visible colour", "Colour for the visible pass.",
+              g.vis_rgb);
+    add_toggle(chams, "Through walls", "Draw a pass with the depth test off.",
+               &g.inv_on);
+    add_dropdown(chams, "Invisible material",
+                 "Material for the through-wall pass.", chams_mat_names, 7,
+                 &g.inv_mat);
+    add_color(chams, "Invisible colour",
+              "Colour for the through-wall pass.", g.inv_rgb);
+  };
+  add_chams_group("Hostile", g_chams_hostile);
+  add_chams_group("Neutral", g_chams_neutral);
+  add_chams_group("Friendly", g_chams_friendly);
+  add_section(chams, "Viewmodel");
   add_toggle(chams, "Viewmodel (hands/weapon)",
-             "Apply chams to the first-person hands and weapon too.",
+             "Apply chams to the first-person hands and weapon.", 
              &g_chams_viewmodel);
-  static const char *const chams_mat_names[] = {
-      "Flat", "Wireframe", "Additive glow", "Solid", "White", "Fullbright"};
-  add_dropdown(chams, "Material", "Chams material.", chams_mat_names, 6,
-               &g_chams_mat_index);
-  add_color(chams, "Colour", "Chams colour.", g_chams_rgb);
+  add_dropdown(chams, "Viewmodel material", "Material for the viewmodel.",
+               chams_mat_names, 7, &g_chams_vm_mat);
+  add_color(chams, "Viewmodel colour", "Colour for the viewmodel.",
+            g_chams_vm_rgb);
   int view = add_card(2, nullptr, "Camera / display",
                       "Camera FOV, viewmodel FOV and HDR brightness.", true);
   add_slider(view, "Camera FOV",