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| RicBent |
Posted on 01-16-17, 03:18 pm (rev. 3 by RicBent on 01-16-17, 03:21 pm)
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Mariomaster
 Karma: 8528 Posts: 787/1681 Since: 06-09-12 |
Well this is mostly a findings dump. All functions beneath are though enough to draw (animated) 3d models.
Still it might not be as detailed as needed to make it usable for everyone. Here we go: NSMB makes it very easy for us. We only need to call 3 functions to get everything going. If you want to draw a model alongside a actor you have to place the corresponding struct in it's alloced memory. What exactly each part of the following structs do is not known, but not necessary. typedef struct // Size: 0x90
{ u32 unk[0x24]; } Model3d; typedef struct // Size: 0x18 { u32 unk[0x6]; } Anim3d; typedef struct // Size: 0xA8 { Model3d model; // 0x00 Anim3d anim; // 0x90 } ModelAnim3d; Use Model3d if you want an unanimated model, use ModelAnim3d if you want an animated model. Now the functions: // Functions for Models without animation void model3d_ctor(Model3d* model); bool model3d_setup(Model3d* model, void* modelFile, u32 unk); void model3d_init(Model3d* model); // Functions for Models with character animation // These functions call all above functions void modelAnim3d_ctor(ModelAnim3d* model); bool modelAnim3d_setup(ModelAnim3d* model, void* modelFile, void* animationFile, u32 unk1 , u32 unk2, u32 unk3); void modelAnim3d_init(Model3d* model, u32 animationId, u32 unk1, u32 animationSpeed, u32 unk2); void anim3d_update(Anim3d* animation); Call the corresponding _ctor function in the constructor of you actor. Then _setup and then _init in onCreate if your actor. _setup is normally called in heapCreated, but that sometimes causes strange crashes. For changing the animation recall _init on the animated modell. To update the animation call anim3d_update on the modelAnim3d.anim somewhere in onExecute. Finally the custom onDraw function. This is custom and made by REing existing sprites: CustomActor_onDraw: STMFD SP!, {R4,LR} MOV R4, R0 @ Set Position LDR R0, =0x0208B6E8 LDR R1, [R4,#0x60] @ Adress of the X Position LDR R2, [R4,#0x64] @ Adress of the Y Position LDR R3, [R4,#0x68] @ Adress of the Z Position BL SetModelPos @ Set Rotation LDR R0, =0x0208B6E8 LDRSH R1, [R4,#0xA0] @ Adress of the X Rotation BL SetModelRotX LDR R0, =0x0208B6E8 LDRSH R1, [R4,#0xA2] @ Adress of the Y Rotation BL SetModelRotY LDR R0, =0x0208B6E8 LDRSH R1, [R4,#0xA4] @ Adress of the Z Rotation BL SetModelRotZ LDR LR, =0x0208B6E8 LDR R12, =0x454 LDMIA LR!, {R0-R3} ADD R12, R4, R12 STMIA R12!, {R0-R3} LDMIA LR!, {R0-R3} STMIA R12!, {R0-R3} LDMIA LR, {R0-R3} STMIA R12, {R0-R3} ADD R0, R4, #0x3F4 @ Adress of the Model ADD R1, R4, #0xF0 @ Adress of the Scale Vec3 LDR R2, [R0] LDR R2, [R2,#0xC] BLX R2 MOV R0, #1 LDMFD SP!, {R4,PC} These are the adresses of the found functions (for symbols.x): model3d_ctor = 0x2019A30; model3d_setup = 0x2019948; model3d_init = 0x2019A30; modelAnim3d_ctor = 0x2019644; modelAnim3d_setup = 0x2019530; modelAnim3d_init = 0x2019440; anim3d_update = 0x201FEB8; SetModelPos = 0x2044814; SetModelRotX = 0x20448B4; SetModelRotY = 0x2044888; SetModelRotZ = 0x204485C; (Oh, the function names I came up with might be entirely senseless. I didn't re what exactly they do. I simply looked at a lot of actors to see how they do it) _________________________ GitHub - Kuribo64 - YouTube |
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