GP32 GCC and GP32 using math.h sin(x)

[StudioX64]

I am trying to use the C function "double result = sin(x);" but am getting no where fast. I have included '#include "math.h" ' but I just keep getting the following:

xscape32.o: In function `GpMain':
xscape32.o(.text+0x74): undefined reference to `sin'
collect2: ld returned 1 exit status
MAKE: *** [xsgp32.elf] Error 1

case is all ok, I have checked and there is definately a math.h in the correct dir and it looks to be correct.

Any ideas, has anyone else used sin function on the GP32?

Thanks,

PK-StudioX64.

 

[Rico]

The math.h is b0rked. However many alternate versions exist, this is the version I use:

const signed long sin_cos_table[256+64+256] ={

    0x00000000,0x00000006,0x0000000c,0x00000012,0x00000019,0x0000001f,0x00000025,0x0000002b,
    0x00000031,0x00000038,0x0000003e,0x00000044,0x0000004a,0x00000050,0x00000056,0x0000005c,
    0x00000061,0x00000067,0x0000006d,0x00000073,0x00000078,0x0000007e,0x00000083,0x00000088,
    0x0000008e,0x00000093,0x00000098,0x0000009d,0x000000a2,0x000000a7,0x000000ab,0x000000b0,
    0x000000b5,0x000000b9,0x000000bd,0x000000c1,0x000000c5,0x000000c9,0x000000cd,0x000000d1,
    0x000000d4,0x000000d8,0x000000db,0x000000de,0x000000e1,0x000000e4,0x000000e7,0x000000ea,
    0x000000ec,0x000000ee,0x000000f1,0x000000f3,0x000000f4,0x000000f6,0x000000f8,0x000000f9,
    0x000000fb,0x000000fc,0x000000fd,0x000000fe,0x000000fe,0x000000ff,0x000000ff,0x000000ff,

    0x00000100,0x000000ff,0x000000ff,0x000000ff,0x000000fe,0x000000fe,0x000000fd,0x000000fc,
    0x000000fb,0x000000f9,0x000000f8,0x000000f6,0x000000f4,0x000000f3,0x000000f1,0x000000ee,
    0x000000ec,0x000000ea,0x000000e7,0x000000e4,0x000000e1,0x000000de,0x000000db,0x000000d8,
    0x000000d4,0x000000d1,0x000000cd,0x000000c9,0x000000c5,0x000000c1,0x000000bd,0x000000b9,
    0x000000b5,0x000000b0,0x000000ab,0x000000a7,0x000000a2,0x0000009d,0x00000098,0x00000093,
    0x0000008e,0x00000088,0x00000083,0x0000007e,0x00000078,0x00000073,0x0000006d,0x00000067,
    0x00000061,0x0000005c,0x00000056,0x00000050,0x0000004a,0x00000044,0x0000003e,0x00000038,
    0x00000031,0x0000002b,0x00000025,0x0000001f,0x00000019,0x00000012,0x0000000c,0x00000006,
    0x00000000,0xfffffffa,0xfffffff4,0xffffffee,0xffffffe7,0xffffffe1,0xffffffdb,0xffffffd5,
    0xffffffcf,0xffffffc8,0xffffffc2,0xffffffbc,0xffffffb6,0xffffffb0,0xffffffaa,0xffffffa4,
    0xffffff9f,0xffffff99,0xffffff93,0xffffff8d,0xffffff88,0xffffff82,0xffffff7d,0xffffff78,
    0xffffff72,0xffffff6d,0xffffff68,0xffffff63,0xffffff5e,0xffffff59,0xffffff55,0xffffff50,
    0xffffff4b,0xffffff47,0xffffff43,0xffffff3f,0xffffff3b,0xffffff37,0xffffff33,0xffffff2f,
    0xffffff2c,0xffffff28,0xffffff25,0xffffff22,0xffffff1f,0xffffff1c,0xffffff19,0xffffff16,
    0xffffff14,0xffffff12,0xffffff0f,0xffffff0d,0xffffff0c,0xffffff0a,0xffffff08,0xffffff07,
    0xffffff05,0xffffff04,0xffffff03,0xffffff02,0xffffff02,0xffffff01,0xffffff01,0xffffff01,
    0xffffff00,0xffffff01,0xffffff01,0xffffff01,0xffffff02,0xffffff02,0xffffff03,0xffffff04,
    0xffffff05,0xffffff07,0xffffff08,0xffffff0a,0xffffff0c,0xffffff0d,0xffffff0f,0xffffff12,
    0xffffff14,0xffffff16,0xffffff19,0xffffff1c,0xffffff1f,0xffffff22,0xffffff25,0xffffff28,
    0xffffff2c,0xffffff2f,0xffffff33,0xffffff37,0xffffff3b,0xffffff3f,0xffffff43,0xffffff47,
    0xffffff4b,0xffffff50,0xffffff55,0xffffff59,0xffffff5e,0xffffff63,0xffffff68,0xffffff6d,
    0xffffff72,0xffffff78,0xffffff7d,0xffffff82,0xffffff88,0xffffff8d,0xffffff93,0xffffff99,
    0xffffff9f,0xffffffa4,0xffffffaa,0xffffffb0,0xffffffb6,0xffffffbc,0xffffffc2,0xffffffc8,
    0xffffffcf,0xffffffd5,0xffffffdb,0xffffffe1,0xffffffe7,0xffffffee,0xfffffff4,0xfffffffa,
    0x00000000,0x00000006,0x0000000c,0x00000012,0x00000019,0x0000001f,0x00000025,0x0000002b,
    0x00000031,0x00000038,0x0000003e,0x00000044,0x0000004a,0x00000050,0x00000056,0x0000005c,
    0x00000061,0x00000067,0x0000006d,0x00000073,0x00000078,0x0000007e,0x00000083,0x00000088,
    0x0000008e,0x00000093,0x00000098,0x0000009d,0x000000a2,0x000000a7,0x000000ab,0x000000b0,
    0x000000b5,0x000000b9,0x000000bd,0x000000c1,0x000000c5,0x000000c9,0x000000cd,0x000000d1,
    0x000000d4,0x000000d8,0x000000db,0x000000de,0x000000e1,0x000000e4,0x000000e7,0x000000ea,
    0x000000ec,0x000000ee,0x000000f1,0x000000f3,0x000000f4,0x000000f6,0x000000f8,0x000000f9,
    0x000000fb,0x000000fc,0x000000fd,0x000000fe,0x000000fe,0x000000ff,0x000000ff,0x000000ff,

    /* repeat once */
    0x00000100,0x000000ff,0x000000ff,0x000000ff,0x000000fe,0x000000fe,0x000000fd,0x000000fc,
    0x000000fb,0x000000f9,0x000000f8,0x000000f6,0x000000f4,0x000000f3,0x000000f1,0x000000ee,
    0x000000ec,0x000000ea,0x000000e7,0x000000e4,0x000000e1,0x000000de,0x000000db,0x000000d8,
    0x000000d4,0x000000d1,0x000000cd,0x000000c9,0x000000c5,0x000000c1,0x000000bd,0x000000b9,
    0x000000b5,0x000000b0,0x000000ab,0x000000a7,0x000000a2,0x0000009d,0x00000098,0x00000093,
    0x0000008e,0x00000088,0x00000083,0x0000007e,0x00000078,0x00000073,0x0000006d,0x00000067,
    0x00000061,0x0000005c,0x00000056,0x00000050,0x0000004a,0x00000044,0x0000003e,0x00000038,
    0x00000031,0x0000002b,0x00000025,0x0000001f,0x00000019,0x00000012,0x0000000c,0x00000006,
    0x00000000,0xfffffffa,0xfffffff4,0xffffffee,0xffffffe7,0xffffffe1,0xffffffdb,0xffffffd5,
    0xffffffcf,0xffffffc8,0xffffffc2,0xffffffbc,0xffffffb6,0xffffffb0,0xffffffaa,0xffffffa4,
    0xffffff9f,0xffffff99,0xffffff93,0xffffff8d,0xffffff88,0xffffff82,0xffffff7d,0xffffff78,
    0xffffff72,0xffffff6d,0xffffff68,0xffffff63,0xffffff5e,0xffffff59,0xffffff55,0xffffff50,
    0xffffff4b,0xffffff47,0xffffff43,0xffffff3f,0xffffff3b,0xffffff37,0xffffff33,0xffffff2f,
    0xffffff2c,0xffffff28,0xffffff25,0xffffff22,0xffffff1f,0xffffff1c,0xffffff19,0xffffff16,
    0xffffff14,0xffffff12,0xffffff0f,0xffffff0d,0xffffff0c,0xffffff0a,0xffffff08,0xffffff07,
    0xffffff05,0xffffff04,0xffffff03,0xffffff02,0xffffff02,0xffffff01,0xffffff01,0xffffff01,
    0xffffff00,0xffffff01,0xffffff01,0xffffff01,0xffffff02,0xffffff02,0xffffff03,0xffffff04,
    0xffffff05,0xffffff07,0xffffff08,0xffffff0a,0xffffff0c,0xffffff0d,0xffffff0f,0xffffff12,
    0xffffff14,0xffffff16,0xffffff19,0xffffff1c,0xffffff1f,0xffffff22,0xffffff25,0xffffff28,
    0xffffff2c,0xffffff2f,0xffffff33,0xffffff37,0xffffff3b,0xffffff3f,0xffffff43,0xffffff47,
    0xffffff4b,0xffffff50,0xffffff55,0xffffff59,0xffffff5e,0xffffff63,0xffffff68,0xffffff6d,
    0xffffff72,0xffffff78,0xffffff7d,0xffffff82,0xffffff88,0xffffff8d,0xffffff93,0xffffff99,
    0xffffff9f,0xffffffa4,0xffffffaa,0xffffffb0,0xffffffb6,0xffffffbc,0xffffffc2,0xffffffc8,
    0xffffffcf,0xffffffd5,0xffffffdb,0xffffffe1,0xffffffe7,0xffffffee,0xfffffff4,0xfffffffa,
    0x00000000,0x00000006,0x0000000c,0x00000012,0x00000019,0x0000001f,0x00000025,0x0000002b,
    0x00000031,0x00000038,0x0000003e,0x00000044,0x0000004a,0x00000050,0x00000056,0x0000005c,
    0x00000061,0x00000067,0x0000006d,0x00000073,0x00000078,0x0000007e,0x00000083,0x00000088,
    0x0000008e,0x00000093,0x00000098,0x0000009d,0x000000a2,0x000000a7,0x000000ab,0x000000b0,
    0x000000b5,0x000000b9,0x000000bd,0x000000c1,0x000000c5,0x000000c9,0x000000cd,0x000000d1,
    0x000000d4,0x000000d8,0x000000db,0x000000de,0x000000e1,0x000000e4,0x000000e7,0x000000ea,
    0x000000ec,0x000000ee,0x000000f1,0x000000f3,0x000000f4,0x000000f6,0x000000f8,0x000000f9,
    0x000000fb,0x000000fc,0x000000fd,0x000000fe,0x000000fe,0x000000ff,0x000000ff,0x000000ff,

};

/* For angle 0-255: */

int trigx (char angle, int distance)
{
  return 320/2 + ( ( sin_cos_table[angle&0xff] * distance ) >> 8);
}

int trigy (char angle, int distance)
{
	return 240/2 + ( ( sin_cos_table[(angle+64)&0xff] * distance ) >> 8);
}

sin is sin_cos_table[(angle+64)&255], cos is sin_cos_table[(angle&255)]

Only problem is, angle is between 0 and 255, but if you can get around it (90 degrees = 63 etc.) then it works fine.

- Rico

 

[jlebrech]

Yes it's the same thing for me i have a sin table, you can download it from gamepark.tk is have made a .h file you can include in your project and aswell i've made a function you can use which doesnt need you to know trig at all, its the rotate() function. It's pretty cool.