/** R_DrawBeam */
void R_DrawBeam(entity_t e) {
oldorigin[0] = e.oldorigin[0];
oldorigin[1] = e.oldorigin[1];
oldorigin[2] = e.oldorigin[2];
origin[0] = e.origin[0];
origin[1] = e.origin[1];
origin[2] = e.origin[2];
normalized_direction[0] = direction[0] = oldorigin[0] - origin[0];
normalized_direction[1] = direction[1] = oldorigin[1] - origin[1];
normalized_direction[2] = direction[2] = oldorigin[2] - origin[2];
if (Math3D.VectorNormalize(normalized_direction) == 0.0f) return;
Math3D.PerpendicularVector(perpvec, normalized_direction);
Math3D.VectorScale(perpvec, e.frame / 2, perpvec);
for (int i = 0; i < 6; i++) {
Math3D.RotatePointAroundVector(
start_points[i], normalized_direction, perpvec, (360.0f / NUM_BEAM_SEGS) * i);
Math3D.VectorAdd(start_points[i], origin, start_points[i]);
Math3D.VectorAdd(start_points[i], direction, end_points[i]);
}
GL11.glDisable(GL11.GL_TEXTURE_2D);
GL11.glEnable(GL11.GL_BLEND);
GL11.glDepthMask(false);
float r = (d_8to24table[e.skinnum & 0xFF]) & 0xFF;
float g = (d_8to24table[e.skinnum & 0xFF] >> 8) & 0xFF;
float b = (d_8to24table[e.skinnum & 0xFF] >> 16) & 0xFF;
r *= 1 / 255.0f;
g *= 1 / 255.0f;
b *= 1 / 255.0f;
GL11.glColor4f(r, g, b, e.alpha);
GL11.glBegin(GL11.GL_TRIANGLE_STRIP);
float[] v;
for (int i = 0; i < NUM_BEAM_SEGS; i++) {
v = start_points[i];
GL11.glVertex3f(v[0], v[1], v[2]);
v = end_points[i];
GL11.glVertex3f(v[0], v[1], v[2]);
v = start_points[(i + 1) % NUM_BEAM_SEGS];
GL11.glVertex3f(v[0], v[1], v[2]);
v = end_points[(i + 1) % NUM_BEAM_SEGS];
GL11.glVertex3f(v[0], v[1], v[2]);
}
GL11.glEnd();
GL11.glEnable(GL11.GL_TEXTURE_2D);
GL11.glDisable(GL11.GL_BLEND);
GL11.glDepthMask(true);
}
