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Add attenuated point lights

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This commit is contained in:
Magnus Norddahl 2017-01-02 06:52:50 +01:00
commit c61e9c7fe2
9 changed files with 80 additions and 14 deletions
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12
src/swrenderer/line/r_walldraw.cpp
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@ -227,11 +227,13 @@ namespace swrenderer
float lz = (float)lightZ;
// Precalculate the constant part of the dot here so the drawer doesn't have to.
bool is_point_light = (cur_node->lightsource->flags4 & MF4_ATTENUATE) != 0;
float lconstant = lx * lx + ly * ly;
float nlconstant = is_point_light ? lx * dc_normal.X + ly * dc_normal.Y : 0.0f;
// Include light only if it touches this column
float radius = cur_node->lightsource->GetRadius();
if (radius * radius >= lconstant)
if (radius * radius >= lconstant && nlconstant >= 0.0f)
{
uint32_t red = cur_node->lightsource->GetRed();
uint32_t green = cur_node->lightsource->GetGreen();
@ -240,6 +242,7 @@ namespace swrenderer
nextlightindex++;
auto &light = dc_lights[dc_num_lights++];
light.x = lconstant;
light.y = nlconstant;
light.z = lz;
light.radius = 256.0f / cur_node->lightsource->GetRadius();
light.color = (red << 16) | (green << 8) | blue;
@ -365,6 +368,13 @@ namespace swrenderer
else
R_SetColorMapLight(basecolormap, 0, 0);
float dx = WallC.tright.X - WallC.tleft.X;
float dy = WallC.tright.Y - WallC.tleft.Y;
float length = sqrt(dx * dx + dy * dy);
dc_normal.X = dy / length;
dc_normal.Y = -dx / length;
dc_normal.Z = 0.0f;
float light = rw_light;
double xmagnitude = 1.0;