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#include <revolution/gd.h>
#include <sdk_math.h>
void GDSetLightAttn(GXLightID light, f32 a0, f32 a1, f32 a2, f32 k0, f32 k1, f32 k2) {
GDWriteXFCmdHdr(__GDLightID2Offset(light) + XF_LIGHT_ATTN_ID, 6);
GDWrite_f32(a0);
GDWrite_f32(a1);
GDWrite_f32(a2);
GDWrite_f32(k0);
GDWrite_f32(k1);
GDWrite_f32(k2);
}
void GDSetLightSpot(GXLightID light, f32 cutoff, GXSpotFn spot_func) {
f32 a0;
f32 a1;
f32 a2;
f32 r;
f32 d;
f32 cr;
if (cutoff <= 0.0f || cutoff > 90.0f) {
spot_func = 0;
}
r = M_PI * cutoff / 180.0f;
cr = cosf(r);
switch(spot_func) {
case GX_SP_FLAT:
a0 = -1000.0f * cr;
a1 = 1000.0f;
a2 = 0.0f;
break;
case GX_SP_COS:
a0 = -cr / (1.0f - cr);
a1 = 1.0f / (1.0f - cr);
a2 = 0.0f;
break;
case GX_SP_COS2:
a0 = 0.0f;
a1 = -cr / (1.0f - cr);
a2 = 1.0f / (1.0f - cr);
break;
case GX_SP_SHARP:
d = (1.0f - cr) * (1.0f - cr);
a0 = (cr * (cr - 2.0f)) / d;
a1 = 2.0f / d;
a2 = -1.0f / d;
break;
case GX_SP_RING1:
d = (1.0f - cr) * (1.0f - cr);
a0 = (-4.0f * cr) / d;
a1 = (4.0f * (1.0f + cr)) / d;
a2 = -4.0f / d;
break;
case GX_SP_RING2:
d = (1.0f - cr) * (1.0f - cr);
a0 = 1.0f - (2.0f * cr * cr) / d;
a1 = (4.0f * cr) / d;
a2 = -2.0f / d;
break;
case GX_SP_OFF:
default:
a0 = 1.0f;
a1 = 0.0f;
a2 = 0.0f;
break;
}
GDWriteXFCmdHdr(__GDLightID2Offset(light) + XF_LIGHT_ATTN_ID, 3);
GDWrite_f32(a0);
GDWrite_f32(a1);
GDWrite_f32(a2);
}
void GDSetLightDistAttn(GXLightID light, f32 ref_dist, f32 ref_br, GXDistAttnFn dist_func) {
f32 k0;
f32 k1;
f32 k2;
if (ref_dist < 0.0f || ref_br <= 0.0f || ref_br >= 1.0f) {
dist_func = 0;
}
switch (dist_func) {
case GX_DA_GENTLE:
k0 = 1.0f;
k1 = (1.0f - ref_br) / (ref_br * ref_dist);
k2 = 0.0f;
break;
case GX_DA_MEDIUM:
k0 = 1.0f;
k1 = (0.5f * (1.0f - ref_br)) / (ref_br * ref_dist);
k2 = (0.5f * (1.0f - ref_br)) / (ref_dist * (ref_br * ref_dist));
break;
case GX_DA_STEEP:
k0 = 1.0f;
k1 = 0.0f;
k2 = (1.0f - ref_br) / (ref_dist * (ref_br * ref_dist));
break;
case GX_DA_OFF:
default:
k0 = 1.0f;
k1 = 0.0f;
k2 = 0.0f;
break;
}
GDWriteXFCmdHdr(__GDLightID2Offset(light) + XF_LIGHT_DISTATTN_ID, 3);
GDWrite_f32(k0);
GDWrite_f32(k1);
GDWrite_f32(k2);
}
void GDSetLightColor(GXLightID light, GXColor color) {
GDWriteXFCmd(__GDLightID2Offset(light) + XF_LIGHT_COLOR_ID, color.r << 24 | color.g << 16 | color.b << 8 | color.a);
}
void GDSetLightPos(GXLightID light, f32 x, f32 y, f32 z) {
GDWriteXFCmdHdr(__GDLightID2Offset(light) + XF_LIGHT_POS_ID, 3);
GDWrite_f32(x);
GDWrite_f32(y);
GDWrite_f32(z);
}
void GDSetLightDir(GXLightID light, f32 nx, f32 ny, f32 nz) {
GDWriteXFCmdHdr(__GDLightID2Offset(light) + XF_LIGHT_DIR_ID, 3);
GDWrite_f32(nx);
GDWrite_f32(ny);
GDWrite_f32(nz);
}
void GDSetSpecularDirHA(GXLightID light, f32 nx, f32 ny, f32 nz, f32 hx, f32 hy, f32 hz) {
f32 px;
f32 py;
f32 pz;
px = 1000000000000000000.0f * -nx;
py = 1000000000000000000.0f * -ny;
pz = 1000000000000000000.0f * -nz;
GDWriteXFCmdHdr(__GDLightID2Offset(light) + XF_LIGHT_SPEC_DIR_ID, 6);
GDWrite_f32(px);
GDWrite_f32(py);
GDWrite_f32(pz);
GDWrite_f32(hx);
GDWrite_f32(hy);
GDWrite_f32(hz);
}
void GDSetSpecularDir(GXLightID light, f32 nx, f32 ny, f32 nz) {
f32 px;
f32 py;
f32 pz;
f32 hx;
f32 hy;
f32 hz;
f32 mag;
hx = -nx;
hy = -ny;
hz = 1.0f + -nz;
mag = hx * hx + hy * hy + hz * hz;
if (mag != 0.0f) {
mag = 1.0f / sqrtf(mag);
}
hx = hx * mag;
hy = hy * mag;
hz = hz * mag;
px = 1000000000000000000.0f * -nx;
py = 1000000000000000000.0f * -ny;
pz = 1000000000000000000.0f * -nz;
GDWriteXFCmdHdr(__GDLightID2Offset(light) + XF_LIGHT_SPEC_DIR_ID, 6);
GDWrite_f32(px);
GDWrite_f32(py);
GDWrite_f32(pz);
GDWrite_f32(hx);
GDWrite_f32(hy);
GDWrite_f32(hz);
}
void GDLoadLightObjIndx(u32 lt_obj_indx, GXLightID light) {
GDWriteXFIndxDCmd(__GDLightID2Offset(light) + XF_LIGHT_ID, 0x10, lt_obj_indx);
}
void GDSetChanAmbColor(GXChannelID chan, GXColor color) {
GDWriteXFCmd((chan & 1) + XF_REG_AMBIENT0_ID, color.r << 24 | color.g << 16 | color.b << 8 | color.a);
}
void GDSetChanMatColor(GXChannelID chan, GXColor color) {
GDWriteXFCmd((chan & 1) + XF_REG_MATERIAL0_ID, color.r << 24 | color.g << 16 | color.b << 8 | color.a);
}
void GDSetChanCtrl(GXChannelID chan, u8 enable, GXColorSrc amb_src, GXColorSrc mat_src, u32 light_mask, GXDiffuseFn diff_fn, GXAttnFn attn_fn) {
u32 reg;
reg = XF_REG_CHAN_CTRL(mat_src, enable, light_mask & 0xF, amb_src, attn_fn == GX_AF_SPEC ? GX_DF_NONE : diff_fn, attn_fn != GX_AF_NONE, attn_fn != GX_AF_SPEC, (light_mask >> 4) & 0xF);
GDWriteXFCmd((chan & 3) + XF_REG_COLOR0CNTRL_ID, reg);
if (chan == 4 || chan == 5) {
GDWriteXFCmd(chan + XF_REG_MATERIAL0_ID, reg);
}
}
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