sda4: commit the Glaze developer hard-drive dump
Un-ignored: the dev drive is the ground truth the restoration and emulator work constantly reference (DPL3/LIBDPL + VRENDER i860 renderer source, BT/RP live+dev game trees, VGL_LABS pod boot, scene/audio content). Kept in-repo for the pod-owner community. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Claude Fable 5
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static void xform_light_project ( VERTEX *v1,
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int n_verts,
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int strip_shade,
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int front_face,
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VIEW *eye,
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LIGHTSOURCE *blondie,
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MATRIX quad_aligned_m,
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MTLSURFACE *surf )
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{
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--{{{ floating point registers
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--{{{ 12 matrix registers total 12
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register float m00, m01, m02,
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m10, m11, m12,
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m20, m21, m22,
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tx, ty, tz;
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--}}}
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--{{{ 7 viewport scaling 18
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register float wx, wy, wz,
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eye_d,
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zmax,
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shx, shy;
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--}}}
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--{{{ 2 lighting registers 20
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/*
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NB - kd is intrinsic colour, held in frame buffer. ks is now also
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held in frame buffer as a 4-bit number, so we 6% control over specular
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stuff.
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*/
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register float normfactor;
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--}}}
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--{{{ 10 temporary registers 31 all used up and more ! ! !
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register float fdot;
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register float invz;
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/* temporary registers, re-loaded per vertex */
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register float px, py, pz;
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#define nx px
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#define ny py
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#define nz pz
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register float cdiff, cspec;
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register float lx, ly, lz;
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#define rx lx
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#define ry ly
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#define rz lz
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--}}}
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--}}}
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--{{{ integer registers
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/* 8 register parameters in use */
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/* if cooked, dolighting=0, lightbump = 0 */
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/* if smooth, dolighting=1, lightbump = 1 */
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/* if flat, dolighting=nv-2, lightbump = -1 */
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/* per vertex, dolighting+=lightbump */
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VERTEX *light_v;
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LIGHTSOURCE *bulb;
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int dolighting;
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int lightbump;
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float *light;
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float *half;
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float *norm;
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float *phong_table;
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int dot;
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--}}}
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--{{{ initialize
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--{{{ cache matrix ...use fld.q if possible
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m00=quad_aligned_m[0][0];
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m01=quad_aligned_m[0][1];
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m02=quad_aligned_m[0][2];
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m10=quad_aligned_m[1][0];
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m11=quad_aligned_m[1][1];
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m12=quad_aligned_m[1][2];
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m20=quad_aligned_m[2][0];
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m21=quad_aligned_m[2][1];
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m22=quad_aligned_m[2][2];
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tx =quad_aligned_m[3][0];
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ty =quad_aligned_m[3][1];
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tz =quad_aligned_m[3][2];
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--}}}
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phong_table=surf->specular_table;
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wx =eye->screen_half_width;
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wy =eye->screen_half_height;
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wz =eye->zscale;
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eye_d=eye->d;
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zmax =1.0f;
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shx=wx*(eye->shift_x + 1.0f);
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shy=wy*(eye->shift_y + 1.0f);
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if (strip_shade & strip_shade_coloured) {
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dolighting = 0;
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lightbump = 0;
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}
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else if (strip_shade & strip_shade_smooth) {
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dolighting = 1;
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lightbump = 0;
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light_v = v1;
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}
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else {
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dolighting = n_verts-2;
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lightbump = -1;
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light_v = v1+1;
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}
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--}}}
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--{{{ which surface ?
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if (front_face)
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normfactor = 1.0f;
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else
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normfactor =-1.0f;
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--}}}
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while (n_verts) {
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--{{{ transform 18 flops
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/* ****************
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transform this point
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*/
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px=v1->position[0];
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py=v1->position[1];
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pz=v1->position[2];
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rx=(px*m00)+(py*m10)+(pz*m20)+tx;
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ry=(px*m01)+(py*m11)+(pz*m21)+ty;
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rz=(px*m02)+(py*m12)+(pz*m22)+tz;
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--}}}
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--{{{ project 18 flops
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/* **************
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project it to screen-space
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*/
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invz=eye_d/rz;
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px=(rx*wx*invz)+shx;
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py=(ry*wy*invz)+shy;
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pz=zmax-(wz*invz);
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#if 0
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--{{{ vertex check
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{
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float x, y;
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int code=0;
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x=px;
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y=py;
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if (x < 0.0) code |= 1;
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if (x > 639.99) code |= 2;
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if (y < 0.0) code |= 4;
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if (y > 479.99) code |= 8;
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if (code) {
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printf ("Vertex (i=%i n_pts=%d) fail in project_points, \ncode=%d x=%f y=%f z=%f shift_x=%f shift_y=%f\n",
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i, n_verts, code, x, y, pz, eye->shift_x, eye->shift_y );
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exit(0);
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}
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}
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--}}}
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#endif
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v1->position[0] = px;
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v1->position[1] = py;
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v1->position[2] = pz;
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--}}}
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--{{{ light 16 flops
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if (dolighting) {
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norm=light_v->normcol;
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/* ********************
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light this point
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*/
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/* NOTE - force into adjacent registers for f0 and fst.d */
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cdiff=0.0f;
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cspec=0.0f;
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nx=normfactor*norm[0];
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ny=normfactor*norm[1];
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nz=normfactor*norm[2];
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for (bulb=blondie; bulb; bulb=bulb->next ) {
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--{{{ light up this vertex according to bulb type
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light=&bulb->xformpos[0];
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/* do diffuse shading */
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lx=light[0];
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ly=light[1];
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lz=light[2];
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fdot=(nx*lx) + (ny*ly) + (nz*lz);
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/* the multiply by light colour happens at end-of-frame */
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if (fdot > 0.0f)
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cdiff+=fdot;
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/* do specular shading - NOTE power factor has gone */
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half=(float *) *(int *) &(bulb->xformpos[3]);
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lx=half[0];
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ly=half[1];
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lz=half[2];
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dot=(int) ((nx*lx) + (ny*ly) + (nz*lz));
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if (dot > 0) {
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if (dot > (phong_precision - 1))
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dot = phong_precision-1;
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/* the multiply by light colour happens at end-of-frame */
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/* ditto ks */
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cspec +=phong_table[dot];
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}
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--}}}
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}
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/* fst.d .. */
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norm[0]=cdiff*230.0;
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norm[1]=cspec*255.0;
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}
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--}}}
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v1++;
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light_v++;
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dolighting+=lightbump;
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n_verts--;
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}
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}
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