marching_cubes_demo

#if you want to visualize using GLVisualize
using GLVisualize,ColorTypes
using GLAbstraction
const vert_shader = """
{{GLSL_VERSION}}
uniform vec3 light[4];
uniform vec3 eyeposition;
in vec3 o_normal;
in vec3 o_vertex;
in vec4 o_color;

out vec4 color;

void main(){
    float amb_intensity = 0.3;
    float diffuse_intensity = 0.6;
    float specular_power = 0.6;
    float specular_intensity = 0.1;
    vec3 light_color = light[0];
    // vec3 light_position = normalize(light[3] - o_vertex);
    vec3 light_position = normalize(vec3(20.0f,20.0f,20.0f) - o_vertex);
    vec4 ambient_color = vec4(light_color * amb_intensity,1.0f);
    vec3 normal = normalize(o_normal);
    float diffuse_factor = dot(normal,light_position);

    vec4 diffuse_color = vec4(light_color,1.0f) *  diffuse_intensity * diffuse_factor;
    vec4 specular_color = vec4(0.0f);
    vec3 vertex_to_eye = normalize(eyeposition-o_vertex);
    vec3 light_reflect = normalize(reflect(-light_position,normal));
    float specular_factor = dot(vertex_to_eye,light_reflect);
    if(specular_factor>0){
        specular_factor = pow(specular_factor,specular_power);
        specular_color = vec4(light_color*specular_intensity*specular_factor,1.0f);
    }
    color = o_color*(ambient_color+diffuse_color);
}"""
const frag_shader = """{{GLSL_VERSION}}
uniform vec3 light[4];
uniform vec3 eyeposition;
in vec3 o_normal;
in vec3 o_vertex;
in vec4 o_color;

out vec4 color;

void main(){
    float amb_intensity = 0.3;
    float diffuse_intensity = 0.6;
    float specular_power = 0.6;
    float specular_intensity = 0.1;
    vec3 light_color = light[0];
    // vec3 light_position = normalize(light[3] - o_vertex);
    vec3 light_position = normalize(vec3(20.0f,20.0f,20.0f) - o_vertex);
    vec4 ambient_color = vec4(light_color * amb_intensity,1.0f);
    vec3 normal = normalize(o_normal);
    float diffuse_factor = dot(normal,light_position);

    vec4 diffuse_color = vec4(light_color,1.0f) *  diffuse_intensity * diffuse_factor;
    vec4 specular_color = vec4(0.0f);
    vec3 vertex_to_eye = normalize(eyeposition-o_vertex);
    vec3 light_reflect = normalize(reflect(-light_position,normal));
    float specular_factor = dot(vertex_to_eye,light_reflect);
    if(specular_factor>0){
        specular_factor = pow(specular_factor,specular_power);
        specular_color = vec4(light_color*specular_intensity*specular_factor,1.0f);
    }
    color = o_color*(ambient_color+diffuse_color);
}"""


screen = glscreen()
mesh = GLNormalVertexcolorMesh(vertices=test_verts,faces=[Face(i,i+1,i+2) for i=1:3:length(test_verts)],color=[RGBA(1.0f0,0.0f0,0.0f0,0.8f0) for i=1:length(test_verts)],shader=LazyShader(vert_shader,frag_shader))
_view(visualize(mesh),screen,camera=:perspective)
renderloop(screen)