oot/src/code/z_view.c

#include <ultra64.h>
#include <global.h>
#include <vt.h>

volatile u32 D_8012ABF0 = true;

void View_ViewportToVp(Vp* dest, Viewport* src) {
    s32 width = src->rightX - src->leftX;
    s32 height = src->bottomY - src->topY;

    dest->vp.vscale[0] = width * 2;
    dest->vp.vscale[1] = height * 2;
    dest->vp.vscale[2] = 0x01FF;
    dest->vp.vscale[3] = 0;
    dest->vp.vtrans[0] = ((src->leftX * 2) + width) * 2;
    dest->vp.vtrans[1] = ((src->topY * 2) + height) * 2;
    dest->vp.vtrans[2] = 0x01FF;
    dest->vp.vtrans[3] = 0;
}

View* View_New(GraphicsContext* gfxCtx) {
    View* view = SystemArena_MallocDebug(sizeof(View), "../z_view.c", 285);

    if (view != NULL) {
        func_80106860(view, 0, sizeof(View)); // memset
        View_Init(view, gfxCtx);
    }

    return view;
}

void View_Free(View* view) {
    SystemArena_FreeDebug(view, "../z_view.c", 297);
}

void View_Init(View* view, GraphicsContext* gfxCtx) {
    view->gfxCtx = gfxCtx;
    view->viewport.topY = 0;
    view->viewport.bottomY = SCREEN_HEIGHT;
    view->viewport.leftX = 0;
    view->viewport.rightX = SCREEN_WIDTH;
    view->magic = 0x56494557; // "VIEW"
    view->eye.x = 0.0f;
    view->eye.y = 0.0f;
    view->scale = 1.0f;
    view->fovy = 60.0f;
    view->zNear = 10.0f;
    view->zFar = 12800.0f;
    view->unk_34.x = 0.0f;
    view->unk_40.x = 0.0f;
    view->unk_40.y = 1.0f;
    view->unk_40.z = 0.0f;
    view->eye.z = -1.0f;

    if (D_8012ABF0) {
        if (&D_8012ABF0) {}
        osSyncPrintf("\nview: initialize ---\n");
        D_8012ABF0 = false;
    }

    view->unk_124 = 0;
    view->flags = 1 | 2 | 4;
    func_800AA7B8(view);
}

void func_800AA358(View* view, Vec3f* eye, Vec3f* vec2, Vec3f* vec3) {
    if (eye->x == vec2->x && eye->z == vec2->z) {
        eye->x += 0.1f;
    }

    view->eye = *eye;
    view->unk_34 = *vec2;
    view->unk_40 = *vec3;
    view->flags |= 1;
}

void func_800AA3F0(View* view, Vec3f* eye, Vec3f* vec2, Vec3f* vec3) {
    view->eye = *eye;
    view->unk_34 = *vec2;
    view->unk_40 = *vec3;
}

void View_SetScale(View* view, f32 scale) {
    view->flags |= 4;
    view->scale = scale;
}

void View_GetScale(View* view, f32* scale) {
    *scale = view->scale;
}

void func_800AA460(View* view, f32 fovy, f32 near, f32 far) {
    view->fovy = fovy;
    view->zNear = near;
    view->zFar = far;
    view->flags |= 4;
}

void func_800AA48C(View* view, f32* fovy, f32* near, f32* far) {
    *fovy = view->fovy;
    *near = view->zNear;
    *far = view->zFar;
}

void func_800AA4A8(View* view, f32 fovy, f32 near, f32 far) {
    view->fovy = fovy;
    view->zNear = near;
    view->zFar = far;
    view->flags |= 8;
    view->scale = 1.0f;
}

void func_800AA4E0(View* view, f32* fovy, f32* near, f32* far) {
    *fovy = view->fovy;
    *near = view->zNear;
    *far = view->zFar;
}

void View_SetViewport(View* view, Viewport* viewport) {
    view->viewport = *viewport;
    view->flags |= 2;
}

void View_GetViewport(View* view, Viewport* viewport) {
    *viewport = view->viewport;
}

void func_800AA550(View* view) {
    s32 varY;
    s32 varX;
    s32 pad;
    s32 ulx;
    s32 uly;
    s32 lrx;
    s32 lry;
    GraphicsContext* gfxCtx;
    Gfx* dispRefs[5];

    gfxCtx = view->gfxCtx;

    varY = func_800B38FC();

    varX = -1; // The following is optimized to varX = 0 but affects codegen

    if (varX < 0) {
        varX = 0;
    }
    if (varX > SCREEN_WIDTH / 2) {
        varX = SCREEN_WIDTH / 2;
    }

    if (varY < 0) {
        varY = 0;
    }
    if (varY > SCREEN_HEIGHT / 2) {
        varY = SCREEN_HEIGHT / 2;
    }

    ulx = view->viewport.leftX + varX;
    uly = view->viewport.topY + varY;
    lrx = view->viewport.rightX - varX;
    lry = view->viewport.bottomY - varY;

    if (ulx < 0) {
        __assert("ulx >= 0", "../z_view.c", 454);
    }
    if (uly < 0) {
        __assert("uly >= 0", "../z_view.c", 455);
    }
    if (lrx > SCREEN_WIDTH) {
        __assert("lrx <= SCREEN_WD", "../z_view.c", 456);
    }
    if (lry > SCREEN_HEIGHT) {
        __assert("lry <= SCREEN_HT", "../z_view.c", 457);
    }

    Graph_OpenDisps(dispRefs, gfxCtx, "../z_view.c", 459);

    gDPPipeSync(gfxCtx->polyOpa.p++);
    gDPSetScissor(gfxCtx->polyOpa.p++, G_SC_NON_INTERLACE, ulx, uly, lrx, lry);
    gDPPipeSync(gfxCtx->polyXlu.p++);
    gDPSetScissor(gfxCtx->polyXlu.p++, G_SC_NON_INTERLACE, ulx, uly, lrx, lry);

    Graph_CloseDisps(dispRefs, gfxCtx, "../z_view.c", 472);
}

void func_800AA76C(View* view, f32 x, f32 y, f32 z) {
    view->unk_E8.x = x;
    view->unk_E8.y = y;
    view->unk_E8.z = z;
}

void func_800AA78C(View* view, f32 x, f32 y, f32 z) {
    view->unk_F4.x = x;
    view->unk_F4.y = y;
    view->unk_F4.z = z;
}

void func_800AA7AC(View* view, f32 arg1) {
    view->unk_100 = arg1;
}

void func_800AA7B8(View* view) {
    view->unk_E8.x = 0.0f;
    view->unk_E8.y = 0.0f;
    view->unk_E8.z = 0.0f;
    view->unk_F4.x = 1.0f;
    view->unk_F4.y = 1.0f;
    view->unk_F4.z = 1.0f;
    view->unk_104 = view->unk_E8;
    view->unk_110 = view->unk_F4;
    view->unk_100 = 0.0f;
}

void func_800AA814(View* view) {
    view->unk_E8.x = 0.0f;
    view->unk_E8.y = 0.0f;
    view->unk_E8.z = 0.0f;
    view->unk_F4.x = 1.0f;
    view->unk_F4.y = 1.0f;
    view->unk_F4.z = 1.0f;
    view->unk_100 = 1.0f;
}

void func_800AA840(View* view, Vec3f vec1, Vec3f vec2, f32 arg3) {
    view->unk_E8 = vec1;
    view->unk_F4 = vec2;
    view->unk_100 = arg3;
}

s32 func_800AA890(View* view, Mtx* mtx) {
    MtxF mf;

    if (view->unk_100 == 0.0f) {
        return 0;
    } else if (view->unk_100 == 1.0f) {
        view->unk_104 = view->unk_E8;
        view->unk_110 = view->unk_F4;
        view->unk_100 = 0.0f;
    } else {
        view->unk_104.x += ((view->unk_E8.x - view->unk_104.x) * view->unk_100);
        view->unk_104.y += ((view->unk_E8.y - view->unk_104.y) * view->unk_100);
        view->unk_104.z += ((view->unk_E8.z - view->unk_104.z) * view->unk_100);

        view->unk_110.x += ((view->unk_F4.x - view->unk_110.x) * view->unk_100);
        view->unk_110.y += ((view->unk_F4.y - view->unk_110.y) * view->unk_100);
        view->unk_110.z += ((view->unk_F4.z - view->unk_110.z) * view->unk_100);
    }

    Matrix_MtxToMtxF(mtx, &mf);
    Matrix_Put(&mf);
    Matrix_RotateX(view->unk_104.x, MTXMODE_APPLY);
    Matrix_RotateY(view->unk_104.y, MTXMODE_APPLY);
    Matrix_RotateZ(view->unk_104.z, MTXMODE_APPLY);
    Matrix_Scale(view->unk_110.x, view->unk_110.y, view->unk_110.z, MTXMODE_APPLY);
    Matrix_RotateZ(-view->unk_104.z, MTXMODE_APPLY);
    Matrix_RotateY(-view->unk_104.y, MTXMODE_APPLY);
    Matrix_RotateX(-view->unk_104.x, MTXMODE_APPLY);
    Matrix_ToMtx(mtx, "../z_view.c", 566);

    return 1;
}

void func_800AAA50(View* view, s32 arg1) {
    arg1 = (view->flags & arg1) | arg1 >> 4;

    if (arg1 & 8) {
        func_800AB0A8(view);
    } else {
        func_800AAA9C(view);
    }
}

s32 func_800AAA9C(View* view) {
    f32 aspect;
    s32 width;
    s32 height;
    Vp* vp;
    Mtx* projection;
    Mtx* viewing;
    GraphicsContext* gfxCtx;
    Gfx* dispRefs[5];

    gfxCtx = view->gfxCtx;
    Graph_OpenDisps(dispRefs, gfxCtx, "../z_view.c", 596);

    vp = Graph_Alloc(gfxCtx, sizeof(Vp));
    LogUtils_CheckNullPointer("vp", vp, "../z_view.c", 601);
    View_ViewportToVp(vp, &view->viewport);
    view->vp = *vp;

    func_800AA550(view);

    gSPViewport(gfxCtx->polyOpa.p++, vp);
    gSPViewport(gfxCtx->polyXlu.p++, vp);

    projection = Graph_Alloc(gfxCtx, sizeof(Mtx));
    LogUtils_CheckNullPointer("projection", projection, "../z_view.c", 616);
    view->projectionPtr = projection;

    width = view->viewport.rightX - view->viewport.leftX;
    height = view->viewport.bottomY - view->viewport.topY;
    aspect = (f32)width / (f32)height;

    if (HREG(80) == 11) {
        if (HREG(94) != 11) {
            HREG(94) = 11;
            HREG(83) = 60;
            HREG(84) = 13333;
            HREG(85) = 10;
            HREG(86) = 12800;
            HREG(87) = 100;
        }
        guPerspective(projection, &view->normal, HREG(83), HREG(84) / 10000.0f, HREG(85), HREG(86), HREG(87) / 100.0f);
    } else {
        guPerspective(projection, &view->normal, view->fovy, aspect, view->zNear, view->zFar, view->scale);
    }

    if (QREG(88) & 1) {
        s32 i;
        MtxF mf;

        osSyncPrintf("fovy %f near %f far %f scale %f aspect %f normal %08x\n", view->fovy, view->zNear, view->zFar,
                     view->scale, aspect, view->normal);

        Matrix_MtxToMtxF(projection, &mf);
        osSyncPrintf("projection\n");
        for (i = 0; i < 4; i++) {
            osSyncPrintf("	%f	%f	%f	%f\n", mf.mf[i][0], mf.mf[i][1], mf.mf[i][2], mf.mf[i][3]);
        }
        osSyncPrintf("\n");
    }

    view->projection = *projection;

    func_800AA890(view, projection);

    gSPPerspNormalize(gfxCtx->polyOpa.p++, view->normal);
    gSPMatrix(gfxCtx->polyOpa.p++, projection, G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_PROJECTION);
    gSPPerspNormalize(gfxCtx->polyXlu.p++, view->normal);
    gSPMatrix(gfxCtx->polyXlu.p++, projection, G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_PROJECTION);

    viewing = Graph_Alloc(gfxCtx, sizeof(Mtx));
    LogUtils_CheckNullPointer("viewing", viewing, "../z_view.c", 667);
    view->viewingPtr = viewing;

    if (view->eye.x == view->unk_34.x && view->eye.y == view->unk_34.y && view->eye.z == view->unk_34.z) {
        view->eye.x += 1.0f;
        view->eye.y += 1.0f;
        view->eye.z += 1.0f;
    }

    func_800ABE74(view->eye.x, view->eye.y, view->eye.z);
    guLookAt(viewing, view->eye.x, view->eye.y, view->eye.z, view->unk_34.x, view->unk_34.y, view->unk_34.z,
             view->unk_40.x, view->unk_40.y, view->unk_40.z);

    view->viewing = *viewing;

    if (QREG(88) & 2) {
        s32 i;
        MtxF mf;

        Matrix_MtxToMtxF(view->viewingPtr, &mf);
        osSyncPrintf("viewing\n");
        for (i = 0; i < 4; i++) {
            osSyncPrintf("	%f	%f	%f	%f\n", mf.mf[i][0], mf.mf[i][1], mf.mf[i][2], mf.mf[i][3]);
        }
        osSyncPrintf("\n");
    }

    gSPMatrix(gfxCtx->polyOpa.p++, viewing, G_MTX_NOPUSH | G_MTX_MUL | G_MTX_PROJECTION);
    gSPMatrix(gfxCtx->polyXlu.p++, viewing, G_MTX_NOPUSH | G_MTX_MUL | G_MTX_PROJECTION);

    Graph_CloseDisps(dispRefs, gfxCtx, "../z_view.c", 711);

    return 1;
}

s32 func_800AB0A8(View* view) {
    Vp* vp;
    Mtx* projection;
    GraphicsContext* gfxCtx;
    Gfx* dispRefs[5];

    gfxCtx = view->gfxCtx;
    Graph_OpenDisps(dispRefs, gfxCtx, "../z_view.c", 726);

    vp = Graph_Alloc(gfxCtx, sizeof(Vp));
    LogUtils_CheckNullPointer("vp", vp, "../z_view.c", 730);
    View_ViewportToVp(vp, &view->viewport);
    view->vp = *vp;

    func_800AA550(view);

    gSPViewport(gfxCtx->polyOpa.p++, vp);
    gSPViewport(gfxCtx->polyXlu.p++, vp);
    gSPViewport(gfxCtx->overlay.p++, vp);

    projection = Graph_Alloc(gfxCtx, sizeof(Mtx));
    LogUtils_CheckNullPointer("projection", projection, "../z_view.c", 744);
    view->projectionPtr = projection;

    func_801045A4(projection, -(f32)gScreenWidth * 0.5f, (f32)gScreenWidth * 0.5f, -(f32)gScreenHeight * 0.5f,
                  (f32)gScreenHeight * 0.5f, view->zNear, view->zFar, view->scale);

    view->projection = *projection;

    gSPMatrix(gfxCtx->polyOpa.p++, projection, G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_PROJECTION);
    gSPMatrix(gfxCtx->polyXlu.p++, projection, G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_PROJECTION);

    Graph_CloseDisps(dispRefs, gfxCtx, "../z_view.c", 762);

    return 1;
}

s32 func_800AB2C4(View* view) {
    Vp* vp;
    Mtx* projection;
    GraphicsContext* gfxCtx;
    Gfx* dispRefs[5];

    if (1) {} // Necessary to match

    gfxCtx = view->gfxCtx;
    Graph_OpenDisps(dispRefs, gfxCtx, "../z_view.c", 777);

    vp = Graph_Alloc(gfxCtx, sizeof(Vp));
    LogUtils_CheckNullPointer("vp", vp, "../z_view.c", 781);
    View_ViewportToVp(vp, &view->viewport);
    view->vp = *vp;

    gDPPipeSync(gfxCtx->overlay.p++);
    gDPSetScissor(gfxCtx->overlay.p++, G_SC_NON_INTERLACE, view->viewport.leftX, view->viewport.topY,
                  view->viewport.rightX, view->viewport.bottomY);
    gSPViewport(gfxCtx->overlay.p++, vp);

    projection = Graph_Alloc(gfxCtx, sizeof(Mtx));
    LogUtils_CheckNullPointer("projection", projection, "../z_view.c", 791);
    view->projectionPtr = projection;

    func_801045A4(projection, -(f32)gScreenWidth * 0.5f, (f32)gScreenWidth * 0.5f, -(f32)gScreenHeight * 0.5f,
                  (f32)gScreenHeight * 0.5f, view->zNear, view->zFar, view->scale);

    view->projection = *projection;

    gSPMatrix(gfxCtx->overlay.p++, projection, G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_PROJECTION);

    Graph_CloseDisps(dispRefs, gfxCtx, "../z_view.c", 801);

    return 1;
}

s32 func_800AB560(View* view) {
    s32 pad[2];
    f32 aspect;
    s32 width;
    s32 height;
    Vp* vp;
    Mtx* projection;
    Mtx* viewing;
    GraphicsContext* gfxCtx;
    Gfx* dispRefs[5];

    gfxCtx = view->gfxCtx;
    Graph_OpenDisps(dispRefs, gfxCtx, "../z_view.c", 816);

    vp = Graph_Alloc(gfxCtx, sizeof(Vp));
    LogUtils_CheckNullPointer("vp", vp, "../z_view.c", 821);
    View_ViewportToVp(vp, &view->viewport);
    view->vp = *vp;

    gDPPipeSync(gfxCtx->overlay.p++);
    gDPSetScissor(gfxCtx->overlay.p++, G_SC_NON_INTERLACE, view->viewport.leftX, view->viewport.topY,
                  view->viewport.rightX, view->viewport.bottomY);
    gSPViewport(gfxCtx->overlay.p++, vp);

    projection = Graph_Alloc(gfxCtx, sizeof(Mtx));
    LogUtils_CheckNullPointer("projection", projection, "../z_view.c", 833);
    view->projectionPtr = projection;

    width = view->viewport.rightX - view->viewport.leftX;
    height = view->viewport.bottomY - view->viewport.topY;

    aspect = (f32)width / (f32)height;
    guPerspective(projection, &view->normal, view->fovy, aspect, view->zNear, view->zFar, view->scale);

    view->projection = *projection;

    gSPPerspNormalize(gfxCtx->overlay.p++, view->normal);
    gSPMatrix(gfxCtx->overlay.p++, projection, G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_PROJECTION);

    viewing = Graph_Alloc(gfxCtx, sizeof(Mtx));
    LogUtils_CheckNullPointer("viewing", viewing, "../z_view.c", 848);
    view->viewingPtr = viewing;

    if (view->eye.x == view->unk_34.x && view->eye.y == view->unk_34.y && view->eye.z == view->unk_34.z) {
        view->eye.x += 1.0f;
        view->eye.y += 1.0f;
        view->eye.z += 1.0f;
    }

    func_800ABE74(view->eye.x, view->eye.y, view->eye.z);
    guLookAt(viewing, view->eye.x, view->eye.y, view->eye.z, view->unk_34.x, view->unk_34.y, view->unk_34.z,
             view->unk_40.x, view->unk_40.y, view->unk_40.z);

    view->viewing = *viewing;

    gSPMatrix(gfxCtx->overlay.p++, viewing, G_MTX_NOPUSH | G_MTX_MUL | G_MTX_PROJECTION);

    Graph_CloseDisps(dispRefs, gfxCtx, "../z_view.c", 871);

    return 1;
}

s32 func_800AB944(View* view) {
    Gfx* dispRefs[5];

    Graph_OpenDisps(dispRefs, view->gfxCtx, "../z_view.c", 878);

    func_800ABE74(view->eye.x, view->eye.y, view->eye.z);
    guLookAt(view->viewingPtr, view->eye.x, view->eye.y, view->eye.z, view->unk_34.x, view->unk_34.y, view->unk_34.z,
             view->unk_40.x, view->unk_40.y, view->unk_40.z);

    Graph_CloseDisps(dispRefs, view->gfxCtx, "../z_view.c", 886);

    return 1;
}

#ifdef NON_MATCHING
// saved register usage is wrong, relatively minor reorderings, regalloc
s32 func_800AB9EC(View* view, s32 arg1, Gfx** gfxp) {
    GraphicsContext* gfxCtx = view->gfxCtx;
    Gfx* gfx = *gfxp;

    arg1 = (view->flags & arg1) | arg1 >> 4;

    if (arg1 & 2) {
        Vp* vp = Graph_Alloc(view->gfxCtx, sizeof(Vp));
        LogUtils_CheckNullPointer("vp", vp, "../z_view.c", 910);
        View_ViewportToVp(vp, &view->viewport);
        view->vp = *vp;

        gDPPipeSync(gfx++);
        gDPSetScissor(gfx++, G_SC_NON_INTERLACE, view->viewport.leftX, view->viewport.topY, view->viewport.rightX,
                      view->viewport.bottomY);
        gSPViewport(gfx++, vp);
    }

    if (arg1 & 8) {
        Mtx* projection = Graph_Alloc(gfxCtx, sizeof(Mtx));
        LogUtils_CheckNullPointer("projection", projection, "../z_view.c", 921);
        view->projectionPtr = projection;

        func_801045A4(projection, -(f32)gScreenWidth * 0.5f, (f32)gScreenWidth * 0.5f, -(f32)gScreenHeight * 0.5f,
                      (f32)gScreenHeight * 0.5f, view->zNear, view->zFar, view->scale);

        view->projection = *projection;

        gSPMatrix(gfx++, projection, G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_PROJECTION);
    } else if (arg1 & 6) {
        s32 width;
        s32 height;
        Mtx* projection = Graph_Alloc(gfxCtx, sizeof(Mtx));
        LogUtils_CheckNullPointer("projection", projection, "../z_view.c", 932);
        view->projectionPtr = projection;

        width = view->viewport.rightX - view->viewport.leftX;
        height = view->viewport.bottomY - view->viewport.topY;

        guPerspective(projection, &view->normal, view->fovy, (f32)width / (f32)height, view->zNear, view->zFar,
                      view->scale);

        view->projection = *projection;

        gSPPerspNormalize(gfx++, view->normal);
        gSPMatrix(gfx++, projection, G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_PROJECTION);
    }

    if (arg1 & 1) {
        Mtx* viewing = Graph_Alloc(gfxCtx, sizeof(Mtx));
        LogUtils_CheckNullPointer("viewing", viewing, "../z_view.c", 948);
        view->viewingPtr = viewing;

        func_800ABE74(view->eye.x, view->eye.y, view->eye.z);
        guLookAt(viewing, view->eye.x, view->eye.y, view->eye.z, view->unk_34.x, view->unk_34.y, view->unk_34.z,
                 view->unk_40.x, view->unk_40.y, view->unk_40.z);

        view->viewing = *viewing;

        gSPMatrix(gfx++, viewing, G_MTX_NOPUSH | G_MTX_MUL | G_MTX_PROJECTION);
    }

    view->flags = 0;
    *gfxp = gfx;

    return 1;
}
#else
#pragma GLOBAL_ASM("asm/non_matchings/code/z_view/func_800AB9EC.s")
#endif

s32 func_800ABE74(f32 eyeX, f32 eyeY, f32 eyeZ) {
    s32 error = 0;

    if (SQ(eyeX) + SQ(eyeY) + SQ(eyeZ) > SQ(32767.0f)) {
        error = 3;
    } else {
        f32 absEyeX = ABS(eyeX);
        f32 absEyeY = ABS(eyeY);
        f32 absEyeZ = ABS(eyeZ);

        if (((18900.0f < absEyeX) || (18900.0f < absEyeY)) || (18900.0f < absEyeZ)) {
            error = 2;
        } else if (((16000.0f < absEyeX) || (16000.0f < absEyeY)) || (16000.0f < absEyeZ)) {
            error = 1;
        }
    }

    if (error != 0) {
        osSyncPrintf(VT_FGCOL(RED));
        // "Is too large"
        osSyncPrintf("eye が大きすぎます eye=[%8.3f %8.3f %8.3f] error=%d\n", eyeX, eyeY, eyeZ, error);
        osSyncPrintf(VT_RST);
    }

    return error;
}