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Raycaster now leaves colors that are above a threshold to have a 'glow' effect.

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This commit is contained in:
Zed A. Shaw 2025-05-24 12:03:26 -04:00
parent c0d668fb0b
commit 96a585220b
3 changed files with 20 additions and 33 deletions
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47
raycaster.cpp
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@ -35,44 +35,29 @@ union ColorConv {
//
// Intensity = Object Intensity/Distance * Multiplier
//
inline uint32_t new_new_lighting(uint32_t pixel, float dist, int level) {
ColorConv conv{.as_int=pixel};
float intensity = (float(level) * PERCENT) / (dist + 1) * 2.5;
conv.as_color.r *= intensity;
conv.as_color.g *= intensity;
conv.as_color.b *= intensity;
return conv.as_int;
}
inline uint32_t old_lighting(uint32_t pixel, float dist, int level) {
(void)level;
ColorConv conv{.as_int=pixel};
conv.as_color.r /= dist;
conv.as_color.g /= dist;
conv.as_color.b /= dist;
return conv.as_int;
}
/* It's hard to believe, but this is faster than any bitfiddling
* I could devise. Just use a union with a struct, do the math
* and I guess the compiler can handle it better than shifting
* bits around.
*/
inline uint32_t new_lighting(uint32_t pixel, float dist, int level) {
// Intensity = Object Intensity/Distance * Multiplier
(void)dist; // ignore for now until I can do more research
float factor = float(level) * PERCENT;
inline uint32_t lighting_calc(uint32_t pixel, float dist, int level) {
ColorConv conv{.as_int=pixel};
conv.as_color.r *= factor;
conv.as_color.g *= factor;
conv.as_color.b *= factor;
if(conv.as_color.b < GLOW_LIMIT
&& conv.as_color.r < GLOW_LIMIT
&& conv.as_color.g < GLOW_LIMIT)
{
float intensity = (float(level) * PERCENT) / (dist + 1) * LIGHT_MULTIPLIER;
conv.as_color.r *= intensity;
conv.as_color.g *= intensity;
conv.as_color.b *= intensity;
}
return conv.as_int;
}
Raycaster::Raycaster(int width, int height) :
$view_texture(sf::Vector2u{(unsigned int)width, (unsigned int)height}),
$view_sprite($view_texture),
@ -332,7 +317,7 @@ void Raycaster::cast_rays() {
tex_pos += step;
RGBA pixel = texture[texture_height * tex_y + tex_x];
int light_level = lights[map_y][map_x];
$pixels[pixcoord(x, y)] = new_new_lighting(pixel, perp_wall_dist, light_level);
$pixels[pixcoord(x, y)] = lighting_calc(pixel, perp_wall_dist, light_level);
}
// SET THE ZBUFFER FOR THE SPRITE CASTING
@ -400,11 +385,11 @@ void Raycaster::draw_ceiling_floor() {
// FLOOR
color = $floor_texture[texture_width * ty + tx];
$pixels[pixcoord(x, y)] = new_new_lighting(color, row_distance, light_level);
$pixels[pixcoord(x, y)] = lighting_calc(color, row_distance, light_level);
// CEILING
color = $ceiling_texture[texture_width * ty + tx];
$pixels[pixcoord(x, $height - y - 1)] = new_new_lighting(color, row_distance, light_level);
$pixels[pixcoord(x, $height - y - 1)] = lighting_calc(color, row_distance, light_level);
}
}
}