code_800BB040 matched (#959)

* getting closer

* match!

* functions unnamed

* Update include/functions.h

Co-authored-by: Roman971 <32455037+Roman971@users.noreply.github.com>

* small changes

Co-authored-by: petrie911 <pmontag@DESKTOP-LG8A167.localdomain>
Co-authored-by: fig02 <fig02srl@gmail.com>
Co-authored-by: Roman971 <32455037+Roman971@users.noreply.github.com>

1 files changed, 68 insertions, 2 deletions

diff --git a/src/code/code_800BB0A0.c b/src/code/code_800BB0A0.c
index 8d9f37b4a..1c9223107 100644
--- a/src/code/code_800BB0A0.c
+++ b/src/code/code_800BB0A0.c
@@ -1,5 +1,71 @@
 #include "global.h"
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/code_800BB0A0/func_800BB0A0.s")
+// The code in this file is very similar to a spline system used in Super Mario 64 for cutscene camera movement
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/code_800BB0A0/func_800BB2B4.s")
+void func_800BB0A0(f32 u, Vec3f* pos, f32* roll, f32* viewAngle, f32* point0, f32* point1, f32* point2, f32* point3) {
+    f32 coeff[4];
+
+    u = CLAMP_MAX(u, 1.0f);
+
+    coeff[0] = (1.0f - u) * (1.0f - u) * (1.0f - u) / 6.0f;
+    coeff[1] = u * u * u / 2.0f - u * u + 2.0f / 3.0f;
+    coeff[2] = -u * u * u / 2.0f + u * u / 2.0f + u / 2.0f + 1.0f / 6.0f;
+    coeff[3] = u * u * u / 6.0f;
+
+    pos->x = (coeff[0] * point0[0]) + (coeff[1] * point1[0]) + (coeff[2] * point2[0]) + (coeff[3] * point3[0]);
+    pos->y = (coeff[0] * point0[1]) + (coeff[1] * point1[1]) + (coeff[2] * point2[1]) + (coeff[3] * point3[1]);
+    pos->z = (coeff[0] * point0[2]) + (coeff[1] * point1[2]) + (coeff[2] * point2[2]) + (coeff[3] * point3[2]);
+    *roll = (coeff[0] * point0[3]) + (coeff[1] * point1[3]) + (coeff[2] * point2[3]) + (coeff[3] * point3[3]);
+    *viewAngle = (coeff[0] * point0[4]) + (coeff[1] * point1[4]) + (coeff[2] * point2[4]) + (coeff[3] * point3[4]);
+}
+
+s32 func_800BB2B4(Vec3f* pos, f32* roll, f32* fov, CutsceneCameraPoint* point, s16* keyFrame, f32* curFrame) {
+    s32 ret = false;
+    f32 pointData[4][5];
+    s32 i;
+    f32 progress = *curFrame;
+    s32 key = *keyFrame;
+    f32 speed1 = 0.0f;
+    f32 speed2 = 0.0f;
+    f32 advance;
+
+    if (key < 0) {
+        progress = 0.0f;
+    }
+
+    if ((point[key].continueFlag == -1) || (point[key + 1].continueFlag == -1) || (point[key + 2].continueFlag == -1)) {
+        return true;
+    }
+
+    for (i = 0; i < 4; i++) {
+        pointData[i][0] = point[key + i].pos.x;
+        pointData[i][1] = point[key + i].pos.y;
+        pointData[i][2] = point[key + i].pos.z;
+        pointData[i][3] = point[key + i].cameraRoll;
+        pointData[i][4] = point[key + i].viewAngle;
+    }
+
+    func_800BB0A0(progress, pos, roll, fov, &pointData[0], &pointData[1], &pointData[2], &pointData[3]);
+
+    if (point[*keyFrame + 1].nextPointFrame != 0) {
+        speed1 = 1.0f / point[*keyFrame + 1].nextPointFrame;
+    }
+
+    if (point[*keyFrame + 2].nextPointFrame != 0) {
+        speed2 = 1.0f / point[*keyFrame + 2].nextPointFrame;
+    }
+    advance = (*curFrame * (speed2 - speed1)) + speed1;
+    if (advance < 0.0f) {
+        advance = 0;
+    }
+    *curFrame += advance;
+    if (*curFrame >= 1) {
+        if (point[++*keyFrame + 3].continueFlag == -1) {
+            *keyFrame = 0;
+            ret = true;
+        }
+        *curFrame -= 1;
+    }
+
+    return ret;
+}