Method DrawFlare

engine/Poseidon/World/Scene/SceneDraw.cpp:142–216

    }
    return 0;
}

void Scene::EndObjects()
{
    // sort by screen size
}

void Scene::DrawFlare(ColorVal color, Vector3Par lightPos, bool secondary)
{
    Color lightColor = color * GEngine->GetAccomodateEye();
    float oldA = lightColor.A();
    // we can draw flares now
    // flare positions between posLight (0) and screen center (1)
    static const float flarePos[FlareLast + 1 - Flare0] = {0.0f,    -0.2f,   -0.1f,  +0.25f, +0.275f, +0.3f,
                                                           +0.4f,   +0.5f,   +0.65f, +0.7f,  +0.725f, +0.75f,
                                                           +0.875f, +0.885f, +1.0f,  +1.1f};
    // note - z is ignored when doing 2D draw
    // but is significant for decal draw
    float w = GLOB_ENGINE->Width();
    float h = GLOB_ENGINE->Height();
    // calculate screen position of light
    Vector3Val pos = ScaledInvTransform() * lightPos;
    // apply perspective
    Matrix4Val project = GetCamera()->Projection();
    const float thold = 0.6f;
    if (pos[2] < thold)
    {
        return; // no flares
    }
    float vis = (pos[2] - thold) * (1.0f / (1 - thold));
    saturateMin(vis, 1);
    float a = 0.9f * vis * vis;
    if (a > 0.01)
    {
        float invW = 1 / pos[2];
        Vector3 lightPos(project(0, 2) + project(0, 0) * pos[0] * invW, project(1, 2) + project(1, 1) * pos[1] * invW,
                         1);

        float size = 0.1f;
        float sizeX = +project(0, 0) * size * GetCamera()->InvLeft();
        float sizeY = -project(1, 1) * size * GetCamera()->InvTop();

        Vector3 center(0.5f * w, 0.5f * h, 1);
        const int special = NoZBuf | IsLight | ClampU | ClampV | IsAlphaFog;
        // Flare0 is handled specially
        {
            lightColor.SetA(oldA * a * 2);
            PackedColor color = PackedColor(lightColor);
            Texture* texture = Preloaded(PreloadedTexture(Flare0));
            if (texture)
            {
                MipInfo mip = GLOB_ENGINE->TextBank()->UseMipmap(texture, 0, 0);
                if (mip.IsOK())
                {
                    float sizeCoef = texture->AWidth() * (1.0f / 64);
                    GEngine->DrawDecal(lightPos, 1, sizeX * sizeCoef, sizeY * sizeCoef, color, mip, special);
                }
            }