Lightning direction affected by Newtonian gravity
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8de602d467
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@ -127,7 +127,7 @@ int update_LIGH(UPDATE_FUNC_ARGS)
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*
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* life - "thickness" of lighting (but anyway one pixel)
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*
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* tmp - angle of lighting
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* tmp - angle of lighting, measured in degrees anticlockwise from the positive x direction
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*
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*/
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int r,rx,ry, multipler, powderful;
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39
src/powder.c
39
src/powder.c
@ -947,24 +947,6 @@ inline int create_part(int p, int x, int y, int tv)//the function for creating a
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}*/
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switch (t)
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{
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case PT_LIGH:
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if (p==-2)
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{
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switch (gravityMode)
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{
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default:
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case 0:
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parts[i].tmp= 270+rand()%40-20;
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break;
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case 1:
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parts[i].tmp = rand()%360;
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break;
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case 2:
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parts[i].tmp = atan2(x-XCNTR, y-YCNTR)*(180.0f/M_PI)+90;
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}
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parts[i].tmp2 = 4;
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}
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break;
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case PT_SOAP:
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parts[i].tmp = -1;
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parts[i].tmp2 = -1;
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@ -1175,6 +1157,27 @@ inline int create_part(int p, int x, int y, int tv)//the function for creating a
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parts[i].tmp2 = 4;//tail
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parts[i].life = 5;
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}
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if (t==PT_LIGH)
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{
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float gx, gy, gsize;
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if (p!=-2)
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{
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parts[i].life=30;
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parts[i].temp=parts[i].life*150.0f; // temperature of the lighting shows the power of the lighting
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}
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get_gravity_field(x, y, 1.0f, 1.0f, &gx, &gy);
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gsize = gx*gx+gy*gy;
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if (gsize<0.0016f)
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{
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float angle = (rand()%6284)*0.001f;//(in radians, between 0 and 2*pi)
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gsize = sqrtf(gsize);
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// randomness in weak gravity fields (more randomness with weaker fields)
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gx += cosf(angle)*(0.04f-gsize);
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gy += sinf(angle)*(0.04f-gsize);
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}
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parts[i].tmp = (((int)(atan2f(-gy, gx)*(180.0f/M_PI)))+rand()%40-20+360)%360;
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parts[i].tmp2 = 4;
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}
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}
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//and finally set the pmap/photon maps to the newly created particle
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if (ptypes[t].properties & TYPE_ENERGY)
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