Revert "Fix alfa for find_vtx_and_set_colours() (#739)"

This reverts commit 6c60f5d.

Author: MegaMech

src/code_800029B0.c

@@ -327,7 +327,7 @@ void func_80003040(void) {
             break;
         case COURSE_BANSHEE_BOARDWALK:
             // d_course_banshee_boardwalk_packed_dl_878
-            find_vtx_and_set_colours(0x07000878, 128, 0, 0, 0);
+            find_vtx_and_set_colours(0x07000878, -0x80, 0, 0, 0);
             break;
         case COURSE_YOSHI_VALLEY:
             vec3f_set(position, -2300.0f, 0.0f, 634.0f);
@@ -351,17 +351,17 @@ void func_80003040(void) {
             break;
         case COURSE_SHERBET_LAND:
             // d_course_sherbet_land_packed_dl_1EB8
-            find_vtx_and_set_colours(0x07001EB8, 76, 0xFF, 0xFF, 0xFF);
+            find_vtx_and_set_colours(0x07001EB8, -0x4C, 0xFF, 0xFF, 0xFF);
             // d_course_sherbet_land_packed_dl_2308
-            find_vtx_and_set_colours(0x07002308, 106, 0xFF, 0xFF, 0xFF);
+            find_vtx_and_set_colours(0x07002308, -0x6A, 0xFF, 0xFF, 0xFF);
             break;
         case COURSE_RAINBOW_ROAD:
             // d_course_rainbow_road_packed_dl_2068
-            find_vtx_and_set_colours(0x07002068, 106, 0xFF, 0xFF, 0xFF);
+            find_vtx_and_set_colours(0x07002068, -0x6A, 0xFF, 0xFF, 0xFF);
             // d_course_rainbow_road_packed_dl_1E18
-            find_vtx_and_set_colours(0x07001E18, 106, 0xFF, 0xFF, 0xFF);
+            find_vtx_and_set_colours(0x07001E18, -0x6A, 0xFF, 0xFF, 0xFF);
             // d_course_rainbow_road_packed_dl_1318
-            find_vtx_and_set_colours(0x07001318, 255, 0xFF, 0xFF, 0);
+            find_vtx_and_set_colours(0x07001318, -1, 0xFF, 0xFF, 0);
             break;
         case COURSE_WARIO_STADIUM:
             vec3f_set(position, -131.0f, 83.0f, 286.0f);

src/racing/render_courses.c

@@ -1547,13 +1547,13 @@ void course_generate_collision_mesh(void) {
             parse_course_displaylists((uintptr_t) d_course_koopa_troopa_beach_addr);
             func_80295C6C();
             // d_course_koopa_troopa_beach_packed_dl_ADE0
-            find_vtx_and_set_colours((uintptr_t) 0x0700ADE0, 106, 255, 255, 255);
+            find_vtx_and_set_colours((uintptr_t) 0x0700ADE0, -0x6A, 255, 255, 255);
             // d_course_koopa_troopa_beach_packed_dl_A540
-            find_vtx_and_set_colours((uintptr_t) 0x0700A540, 106, 255, 255, 255);
+            find_vtx_and_set_colours((uintptr_t) 0x0700A540, -0x6A, 255, 255, 255);
             // d_course_koopa_troopa_beach_packed_dl_9E70
-            find_vtx_and_set_colours((uintptr_t) 0x07009E70, 106, 255, 255, 255);
+            find_vtx_and_set_colours((uintptr_t) 0x07009E70, -0x6A, 255, 255, 255);
             // d_course_koopa_troopa_beach_packed_dl_358
-            find_vtx_and_set_colours((uintptr_t) 0x07000358, 106, 255, 255, 255);
+            find_vtx_and_set_colours((uintptr_t) 0x07000358, -0x6A, 255, 255, 255);
             break;
         case COURSE_ROYAL_RACEWAY:
             parse_course_displaylists((uintptr_t) d_course_royal_raceway_addr);
@@ -1590,24 +1590,24 @@ void course_generate_collision_mesh(void) {
             func_80295C6C();
             D_8015F8E4 = -18.0f;
             // d_course_sherbet_land_packed_dl_1EB8
-            find_vtx_and_set_colours((uintptr_t) 0x07001EB8, 76, 255, 255, 255);
+            find_vtx_and_set_colours((uintptr_t) 0x07001EB8, -0x4C, 255, 255, 255);
             // d_course_sherbet_land_packed_dl_2308
-            find_vtx_and_set_colours((uintptr_t) 0x07002308, 106, 255, 255, 255);
+            find_vtx_and_set_colours((uintptr_t) 0x07002308, -0x6A, 255, 255, 255);
             break;
         case COURSE_RAINBOW_ROAD:
             D_800DC5C8 = 1;
             parse_course_displaylists((uintptr_t) d_course_rainbow_road_addr);
             func_80295C6C();
             D_8015F8E4 = 0.0f;
             // d_course_rainbow_road_packed_dl_2068
-            find_vtx_and_set_colours((uintptr_t) 0x07002068, 106, 255, 255, 255);
+            find_vtx_and_set_colours((uintptr_t) 0x07002068, -0x6A, 255, 255, 255);
             // d_course_rainbow_road_packed_dl_1E18
-            find_vtx_and_set_colours((uintptr_t) 0x07001E18, 106, 255, 255, 255);
+            find_vtx_and_set_colours((uintptr_t) 0x07001E18, -0x6A, 255, 255, 255);
             // d_course_rainbow_road_packed_dl_1318
             find_vtx_and_set_colours((uintptr_t) 0x07001318, 255, 255, 255, 0);
             if (gGamestate != CREDITS_SEQUENCE) {
                 // d_course_rainbow_road_packed_dl_1FB8
-                find_vtx_and_set_colours((uintptr_t) 0x07001FB8, 106, 255, 255, 255);
+                find_vtx_and_set_colours((uintptr_t) 0x07001FB8, -0x6A, 255, 255, 255);
             }
             break;
         case COURSE_WARIO_STADIUM: