mirror of https://github.com/PrimeDecomp/prime.git
270 lines
6.0 KiB
C
270 lines
6.0 KiB
C
#include "dolphin/gx.h"
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#include "dolphin/gx/GXPriv.h"
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extern float cosf(float x);
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extern float sqrtf(float x);
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#define GX_LARGE_NUMBER 1.0e+18f;
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void GXInitLightAttn(GXLightObj* lt_obj, f32 a0, f32 a1, f32 a2, f32 k0, f32 k1, f32 k2) {
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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obj->a0 = a0;
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obj->a1 = a1;
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obj->a2 = a2;
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obj->k0 = k0;
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obj->k1 = k1;
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obj->k2 = k2;
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}
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void GXInitLightAttnA(GXLightObj* lt_obj, f32 a0, f32 a1, f32 a2) {
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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obj->a0 = a0;
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obj->a1 = a1;
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obj->a2 = a2;
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}
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void GXGetLightAttnA(const GXLightObj* lt_obj, f32* a0, f32* a1, f32* a2) {
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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*a0 = obj->a0;
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*a1 = obj->a1;
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*a2 = obj->a2;
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}
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void GXInitLightAttnK(GXLightObj* lt_obj, f32 k0, f32 k1, f32 k2) {
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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obj->k0 = k0;
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obj->k1 = k1;
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obj->k2 = k2;
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}
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void GXGetLightAttnK(const GXLightObj* lt_obj, f32* k0, f32* k1, f32* k2) {
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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*k0 = obj->k0;
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*k1 = obj->k1;
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*k2 = obj->k2;
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}
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#define PI 3.14159265358979323846F
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void GXInitLightSpot(GXLightObj* lt_obj, f32 cutoff, GXSpotFn spot_func) {
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f32 a0, a1, a2, r, d, cr;
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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if (cutoff <= 0.0f || cutoff > 90.0f) {
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spot_func = GX_SP_OFF;
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}
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r = cutoff * PI / 180.0f;
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cr = cosf(r);
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switch (spot_func) {
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case GX_SP_FLAT:
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a0 = -1000.0f * cr;
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a1 = 1000.0f;
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a2 = 0.0f;
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break;
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case GX_SP_COS:
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a1 = 1.0f / (1.0f - cr);
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a0 = -cr * a1;
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a2 = 0.0f;
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break;
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case GX_SP_COS2:
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a2 = 1.0f / (1.0f - cr);
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a0 = 0.0f;
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a1 = -cr * a2;
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break;
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case GX_SP_SHARP:
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d = 1.0F / ((1.0F - cr) * (1.0F - cr));
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a0 = cr * (cr - 2.0F) * d;
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a1 = 2.0F * d;
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a2 = -d;
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break;
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case GX_SP_RING1:
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d = 1.0f / ((1.0f - cr) * (1.0F - cr));
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a2 = -4.0f * d;
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a0 = a2 * cr;
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a1 = 4.0f * (1.0f + cr) * d;
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break;
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case GX_SP_RING2:
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d = 1.0f / ((1.0f - cr) * (1.0F - cr));
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a0 = 1.0f - 2.0f * cr * cr * d;
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a1 = 4.0f * cr * d;
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a2 = -2.0f * d;
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break;
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case GX_SP_OFF:
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default:
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a0 = 1.0f;
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a1 = 0.0f;
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a2 = 0.0f;
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break;
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}
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obj->a0 = a0;
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obj->a1 = a1;
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obj->a2 = a2;
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}
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void GXInitLightDistAttn(GXLightObj* lt_obj, f32 ref_dist, f32 ref_br, GXDistAttnFn dist_func) {
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f32 k0, k1, k2;
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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if (ref_dist < 0.0F) {
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dist_func = GX_DA_OFF;
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}
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if (ref_br <= 0.0F || ref_br >= 1.0F) {
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dist_func = GX_DA_OFF;
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}
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switch (dist_func) {
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case GX_DA_GENTLE:
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k0 = 1.0F;
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k1 = (1.0F - ref_br) / (ref_br * ref_dist);
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k2 = 0.0F;
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break;
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case GX_DA_MEDIUM:
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k0 = 1.0f;
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k1 = 0.5f * (1.0f - ref_br) / (ref_br * ref_dist);
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k2 = 0.5f * (1.0f - ref_br) / (ref_br * ref_dist * ref_dist);
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break;
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case GX_DA_STEEP:
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k0 = 1.0f;
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k1 = 0.0f;
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k2 = (1.0f - ref_br) / (ref_br * ref_dist * ref_dist);
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break;
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case GX_DA_OFF:
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default:
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k0 = 1.0f;
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k1 = 0.0f;
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k2 = 0.0f;
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break;
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}
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obj->k0 = k0;
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obj->k1 = k1;
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obj->k2 = k2;
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}
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void GXInitLightPos(GXLightObj* lt_obj, f32 x, f32 y, f32 z) {
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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obj->px = x;
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obj->py = y;
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obj->pz = z;
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}
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void GXGetLightPos(const GXLightObj* lt_obj, f32* x, f32* y, f32* z) {
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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*x = obj->px;
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*y = obj->py;
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*z = obj->pz;
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}
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void GXInitLightDir(GXLightObj* lt_obj, f32 nx, f32 ny, f32 nz) {
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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obj->nx = -nx;
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obj->ny = -ny;
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obj->nz = -nz;
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}
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void GXGetLightDir(const GXLightObj* lt_obj, f32* nx, f32* ny, f32* nz) {
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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*nx = -(obj->nx);
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*ny = -(obj->ny);
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*nz = -(obj->nz);
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}
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void GXInitSpecularDir(GXLightObj* lt_obj, f32 nx, f32 ny, f32 nz) {
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f32 mag;
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f32 vx, vy, vz;
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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vx = -nx;
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vy = -ny;
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vz = (-nz + 1.0F);
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mag = vx * vx + vy * vy + vz * vz;
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if (mag != 0.0f) {
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mag = 1.0f / sqrtf(mag);
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}
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obj->px = vx * mag;
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obj->py = vy * mag;
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obj->pz = vz * mag;
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obj->nx = nx * -GX_LARGE_NUMBER;
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obj->ny = ny * -GX_LARGE_NUMBER;
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obj->nz = nz * -GX_LARGE_NUMBER;
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}
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void GXInitSpecularDirHA(GXLightObj* lt_obj, f32 nx, f32 ny, f32 nz, f32 hx, f32 hy, f32 hz) {
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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obj->nx = hx;
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obj->ny = hy;
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obj->nz = hz;
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obj->px = nx * -GX_LARGE_NUMBER;
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obj->py = ny * -GX_LARGE_NUMBER;
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obj->pz = nz * -GX_LARGE_NUMBER;
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}
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void GXInitLightColor(GXLightObj* lt_obj, GXColor color) {
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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obj->color = *(u32*)(&color);
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}
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void GXGetLightColor(const GXLightObj* lt_obj, GXColor* color) {
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GXLightObjInt* obj = (GXLightObjInt*)lt_obj;
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*(u32*)color = obj->color;
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}
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static inline void PushLight(const register GXLightObjInt* lt_obj, register void* dest) {
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register u32 zero, color;
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register f32 a0_a1, a2_k0, k1_k2;
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register f32 px_py, pz_dx, dy_dz;
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asm
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{
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lwz color, 12(lt_obj)
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xor zero, zero, zero
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psq_l a0_a1, 16(lt_obj), 0, 0
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psq_l a2_k0, 24(lt_obj), 0, 0
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psq_l k1_k2, 32(lt_obj), 0, 0
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psq_l px_py, 40(lt_obj), 0, 0
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psq_l pz_dx, 48(lt_obj), 0, 0
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psq_l dy_dz, 56(lt_obj), 0, 0
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stw zero, 0(dest)
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stw zero, 0(dest)
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stw zero, 0(dest)
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stw color, 0(dest)
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psq_st a0_a1, 0(dest), 0, 0
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psq_st a2_k0, 0(dest), 0, 0
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psq_st k1_k2, 0(dest), 0, 0
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psq_st px_py, 0(dest), 0, 0
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psq_st pz_dx, 0(dest), 0, 0
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psq_st dy_dz, 0(dest), 0, 0
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}
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}
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void GXLoadLightObjImm(GXLightObj* lt_obj, GXLightID light) {
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u32 addr;
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u32 idx;
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GXLightObjInt* obj;
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obj = (GXLightObjInt*)lt_obj;
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idx = 31 - __cntlzw(light);
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idx &= 7;
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addr = XF_LIGHT_BASE + idx * XF_LIGHT_SIZE;
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GX_WRITE_U8(16);
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GX_WRITE_U32(addr | (XF_LIGHT_SIZE - 1) << 16);
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PushLight(obj, (void*)GX_FIFO_ADDR);
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gx->bpSentNot = 1;
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}
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void GXSetChanAmbColor(GXChannelID chan, GXColor color) {}
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