diff options
author | sanine-a <sanine.not@pm.me> | 2020-10-18 12:10:48 -0500 |
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committer | sanine-a <sanine.not@pm.me> | 2020-10-18 12:10:48 -0500 |
commit | 225167461d754b476b4fcc7726c492cc972ca654 (patch) | |
tree | d0a8060fe28a94b6fb24c002aa9744706e496b18 /cel.fs | |
parent | 1bc1f216e5682cd7918240f37f3709b642e08e2b (diff) |
clear out old files, add basic scripting
Diffstat (limited to 'cel.fs')
-rw-r--r-- | cel.fs | 114 |
1 files changed, 0 insertions, 114 deletions
@@ -1,114 +0,0 @@ -#version 330 core - -/* input from the vector shader */ -in vec3 in_normal; -in vec2 in_texture_coordinate; -in vec3 in_fragment_position; - -/* light uniforms */ -uniform vec3 ambient_color; - -struct point_light { - vec3 position; /* in view space */ - - float constant; - float linear; - float quadratic; - - vec3 color; -}; - -struct directional_light { - vec3 direction; /* in view space */ - vec3 color; -}; - -#define MAX_POINT_LIGHTS 8 -#define MAX_DIRECTIONAL_LIGHTS 8 - -uniform point_light point_lights[MAX_POINT_LIGHTS]; -uniform int n_point_lights; - -uniform directional_light directional_lights[MAX_DIRECTIONAL_LIGHTS]; -uniform int n_directional_lights; - -/* texture uniforms */ -uniform sampler2D tex; - -/* view matrix */ -uniform mat4 view; - -out vec4 fragment_color; - -/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ - -/* compute phong cel-shader intensity */ -float compute_light_intensity(vec3 normal, vec3 light_direction, vec3 view_direction) { - /* diffuse light */ - float diffuse_intensity = max(dot(normal, light_direction), 0); - diffuse_intensity = smoothstep(0, 0.01, diffuse_intensity); - - /* specular highlight */ - vec3 reflection_direction = reflect(-light_direction, normal); - float specular_intensity = pow(max(dot(view_direction, reflection_direction), 0), 256); - specular_intensity = smoothstep(0.005, 0.01, specular_intensity); - - return diffuse_intensity;// + specular_intensity; -} - -/* compute directional light contribution */ -vec3 compute_directional_light(directional_light light, vec3 normal, vec3 view_direction) { - vec3 light_direction = -vec3(view * vec4(light.direction.xyz, 0.0)); - return light.color * compute_light_intensity(normal, light_direction, view_direction); -} - -/* compute point light contribution */ -vec3 compute_point_light(point_light light, vec3 normal, vec3 fragment_position, vec3 view_direction) { - vec3 light_position = vec3(view * vec4(light.position.xyz, 1.0)); - vec3 light_direction = normalize(light_position - fragment_position); - - float light_intensity = compute_light_intensity(normal, light_direction, view_direction); - - /* attenuation */ - float distance = length(light_position - fragment_position); - float attenuation = 1.0 / (light.constant + - light.linear * distance + - light.quadratic * distance * distance); - - return attenuation * light.color * light_intensity; -} - -void main() -{ - vec3 normal = normalize(in_normal); - vec3 view_direction = normalize(-in_fragment_position); - - vec3 point_light_contrib = vec3(0, 0, 0); - for (int i=0; i<n_point_lights; i++) { - point_light_contrib += compute_point_light(point_lights[i], - normal, - in_fragment_position, - view_direction); - } - - vec3 directional_light_contrib = vec3(0,0,0); - for (int i=0; i<n_directional_lights; i++) { - directional_light_contrib += compute_directional_light(directional_lights[i], - normal, - view_direction); - } - - /* rim lighting */ - float rim_amount = 0.716; - float rim_threshold = 0.5; - float rim_norm = 1 - dot(normal, view_direction); - float rim_intensity = rim_norm; - if (point_light_contrib == vec3(0,0,0) && directional_light_contrib == vec3(0,0,0)) { - rim_intensity = 0; - } - rim_intensity = smoothstep(rim_amount - 0.01, rim_amount + 0.01, rim_intensity); - vec3 rim_light = rim_intensity * ambient_color; - - vec4 total_light = vec4((ambient_color + point_light_contrib + directional_light_contrib).xyz, 1.0); - fragment_color = total_light * texture(tex, in_texture_coordinate); -} |