OrdinaryMagician/vkdoom_m
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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/plane/r_flatplane.cpp
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@ -255,8 +255,13 @@ namespace swrenderer
static TriLight lightbuffer[64 * 1024];
static int nextlightindex = 0;
// Plane normal
dc_normal.X = 0.0f;
dc_normal.Y = 0.0f;
dc_normal.Z = (y >= CenterY) ? 1.0f : -1.0f;
// Setup lights for column
// Setup lights for row
dc_num_lights = 0;
dc_lights = lightbuffer + nextlightindex;
visplane_light *cur_node = ds_light_list;
@ -271,11 +276,13 @@ namespace swrenderer
float lz = (float)lightZ - dc_viewpos.Z;
// 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 = ly * ly + lz * lz;
float nlconstant = is_point_light ? lz * dc_normal.Z : 0.0f;
// Include light only if it touches this row
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();
@ -285,6 +292,7 @@ namespace swrenderer
auto &light = dc_lights[dc_num_lights++];
light.x = lx;
light.y = lconstant;
light.z = nlconstant;
light.radius = 256.0f / radius;
light.color = (red << 16) | (green << 8) | blue;
}