mirror of
https://github.com/MaSzyna-EU07/maszyna.git
synced 2026-03-22 15:05:03 +01:00
80 lines
2.1 KiB
GLSL
80 lines
2.1 KiB
GLSL
float calc_shadow()
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{
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vec3 coords = f_light_pos.xyz / f_light_pos.w;
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if (coords.z > 1.0f)
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return 1.0f;
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float bias = 0.0f;
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//sampler PCF
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//float shadow = texture(shadowmap, vec3(coords.xy, coords.z - bias));
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//sampler PCF + PCF
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float shadow = 0.0;
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vec2 texel = 1.0 / textureSize(shadowmap, 0);
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for (float y = -1.5; y <= 1.5; y += 1.0)
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for (float x = -1.5; x <= 1.5; x += 1.0)
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shadow += texture(shadowmap, coords.xyz + vec3(vec2(x, y) * texel, -bias));
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shadow /= 16.0;
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return shadow;
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}
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vec3 apply_fog(vec3 color)
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{
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float sun_amount = 0.0;
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if (lights_count >= 1U && lights[0].type == LIGHT_DIR)
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sun_amount = max(dot(normalize(f_pos.xyz), normalize(-lights[0].dir)), 0.0);
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vec3 fog_color_v = mix(fog_color, lights[0].color, pow(sun_amount, 30.0));
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float fog_amount_v = 1.0 - min(1.0, exp(-length(f_pos.xyz) * fog_density));
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return mix(color, fog_color_v, fog_amount_v);
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}
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// [0] - diffuse, [1] - specular
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// do magic here
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vec2 calc_light(vec3 light_dir)
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{
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#ifdef NORMALMAP
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vec3 normal = f_tbn * normalize(texture(normalmap, f_coord).rgb * 2.0 - 1.0);
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#else
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vec3 normal = normalize(f_normal);
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#endif
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vec3 view_dir = normalize(vec3(0.0f, 0.0f, 0.0f) - f_pos.xyz);
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vec3 halfway_dir = normalize(light_dir + view_dir);
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float diffuse_v = max(dot(normal, light_dir), 0.0);
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float specular_v = pow(max(dot(normal, halfway_dir), 0.0), 15.0);
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return vec2(diffuse_v, specular_v);
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}
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vec2 calc_point_light(light_s light)
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{
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vec3 light_dir = normalize(light.pos - f_pos.xyz);
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vec2 val = calc_light(light_dir);
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float distance = length(light.pos - f_pos.xyz);
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float atten = 1.0f / (1.0f + light.linear * distance + light.quadratic * (distance * distance));
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return val * atten;
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}
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vec2 calc_spot_light(light_s light)
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{
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vec3 light_dir = normalize(light.pos - f_pos.xyz);
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float theta = dot(light_dir, normalize(-light.dir));
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float epsilon = light.in_cutoff - light.out_cutoff;
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float intensity = clamp((theta - light.out_cutoff) / epsilon, 0.0, 1.0);
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vec2 point = calc_point_light(light);
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return point * intensity;
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}
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vec2 calc_dir_light(light_s light)
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{
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vec3 light_dir = normalize(-light.dir);
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return calc_light(light_dir);
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}
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