112 lines
3.6 KiB
C
112 lines
3.6 KiB
C
/*
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Copyright 2016-2018 Marco "eukara" Hladik
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MIT LICENSE
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use,
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copy, modify, merge, publish, distribute, sublicense, and/or
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sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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*/
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/* We need to save trace infos temporarily in order to figure out what to
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* project the decal against. Half-Life's infodecal entity only stores origin,
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* but not angles. So we have to figure them out ourselves. */
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typedef struct {
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float fraction;
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vector normal;
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vector endpos;
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} traced_t;
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float infodecal_send(entity pvsent, float cflags)
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{
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WriteByte(MSG_ENTITY, ENT_DECAL);
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WriteCoord(MSG_ENTITY, self.origin[0]);
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WriteCoord(MSG_ENTITY, self.origin[1]);
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WriteCoord(MSG_ENTITY, self.origin[2]);
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WriteCoord(MSG_ENTITY, self.angles[0]);
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WriteCoord(MSG_ENTITY, self.angles[1]);
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WriteCoord(MSG_ENTITY, self.angles[2]);
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/* Figure this thing out */
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WriteByte(MSG_ENTITY, 255);
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WriteByte(MSG_ENTITY, 0);
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WriteByte(MSG_ENTITY, 0);
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WriteString(MSG_ENTITY, self.texture );
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return TRUE;
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}
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void infodecal(void)
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{
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traced_t tmp[6];
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int i = 0;
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int b = 0;
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float frac = 1.0f;
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vector vpos = self.origin;
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/* Unrolled because I'm lazy */
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makevectors([0, 0, 0]);
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traceline(vpos + (v_forward * -1), vpos + (v_forward * 128), 1, self);
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tmp[0].fraction = trace_fraction;
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tmp[0].normal = trace_plane_normal;
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tmp[0].endpos = trace_endpos;
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traceline(vpos + (v_forward * 1), vpos + (v_forward * -128), 1, self);
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tmp[1].fraction = trace_fraction;
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tmp[1].normal = trace_plane_normal;
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tmp[1].endpos = trace_endpos;
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traceline(vpos + (v_right * -1), vpos + (v_right * 128), 1, self);
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tmp[2].fraction = trace_fraction;
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tmp[2].normal = trace_plane_normal;
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tmp[2].endpos = trace_endpos;
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traceline(vpos + (v_right * 1), vpos + (v_right * -128), 1, self);
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tmp[3].fraction = trace_fraction;
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tmp[3].normal = trace_plane_normal;
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tmp[3].endpos = trace_endpos;
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traceline(vpos + (v_up * -1), vpos + (v_up * 128), 1, self);
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tmp[4].fraction = trace_fraction;
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tmp[4].normal = trace_plane_normal;
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tmp[4].endpos = trace_endpos;
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traceline(vpos + (v_up * 1), vpos + (v_up * -128), 1, self);
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tmp[5].fraction = trace_fraction;
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tmp[5].normal = trace_plane_normal;
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tmp[5].endpos = trace_endpos;
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for (i = 0; i < 6; i++) {
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if ( tmp[i].fraction < frac ) {
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frac = tmp[i].fraction;
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b = i;
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}
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}
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if (frac == 1.0f) {
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objerror(sprintf("infodecal tracing failed at %v\n", self.origin));
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return;
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}
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makevectors(vectoangles(tmp[b].endpos - self.origin ));
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vector cpl = v_forward - (v_forward * tmp[b].normal) * tmp[b].normal;
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if (tmp[b].normal[2] == 0) {
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cpl = [0, 0, 1];
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}
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self.angles = vectoangles(cpl, tmp[b].normal);
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self.solid = SOLID_NOT;
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self.pvsflags = PVSF_NOREMOVE | PVSF_IGNOREPVS;
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self.SendEntity = infodecal_send;
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self.SendFlags = 1;
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}
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