Implemented simple terrain generation

assets/shaders/terrain.frag

@@ -0,0 +1,86 @@
+#version 450
+
+#define MAX_POINT_LIGHTS 1024
+
+struct PointLight {
+	vec3 position;
+	vec3 ambient;
+	vec3 diffuse;
+	vec3 specular;
+	vec3 data;
+};
+
+layout(location = 0) out vec4 outColor;
+
+layout(location = 2) in vec3 Normal;
+layout(location = 3) in vec3 FragPos;
+layout(location = 4) in vec2 TexCoords;
+
+layout (binding = 2) uniform DirectionalLight {
+	vec3 direction;
+
+	vec3 ambient;
+	vec3 diffuse;
+	vec3 specular;
+} directional_light;
+layout (binding = 5) uniform PointLights {    
+	PointLight point_lights[MAX_POINT_LIGHTS];
+} point_lights;
+
+layout (binding = 3) uniform ViewUniform {
+    vec3 pos;
+} viewPos;
+
+layout(push_constant) uniform pc {
+    int light_count;
+} pushConstants;
+
+vec3 calc_directional_light(vec3 normal, vec3 viewDir) {
+	vec3 lightDir = normalize(-directional_light.direction);
+	float diff = max(dot(normal, lightDir), 0.0);
+	vec3 diffuse  = directional_light.diffuse  * diff;
+	return (directional_light.ambient + diffuse);
+}
+
+vec3 calc_point_light(int index, vec3 normal, vec3 fragPos, vec3 viewDir) {
+	float constant = point_lights.point_lights[index].data[0];
+	float linear = point_lights.point_lights[index].data[1];
+	float quadratic = point_lights.point_lights[index].data[2];
+
+	vec3 lightDir = normalize(point_lights.point_lights[index].position - fragPos);
+	float diff = max(dot(normal, lightDir), 0.0);
+	vec3 reflectDir = reflect(-lightDir, normal);
+	float distance    = length(point_lights.point_lights[index].position - fragPos);
+	float attenuation = 1.0 / (constant + linear * distance + quadratic * (distance * distance));
+	vec3 ambient  = point_lights.point_lights[index].ambient;
+	vec3 diffuse  = point_lights.point_lights[index].diffuse  * diff;
+	ambient  *= attenuation;
+	diffuse  *= attenuation;
+	return (ambient + diffuse);
+}
+
+void main() {
+	vec3 norm = normalize(Normal);
+	vec3 viewDir = normalize(viewPos.pos - FragPos);
+
+	vec3 result = calc_directional_light(norm, viewDir);
+	//vec3 result = vec3(0.0, 0.0, 0.0);
+	for(int i = 0; i < pushConstants.light_count; i++)
+		result += calc_point_light(i, norm, FragPos, viewDir);    
+
+	vec3 tall = vec3(1.0, 0.0, 0.0);
+	vec3 mid = vec3(0.0, 1.0, 0.0);
+	vec3 water = vec3(0.0, 0.0, 1.0);
+
+	vec3 color;
+
+	if (FragPos.y < 0.05) {
+	    color = water;
+	} else if (FragPos.y > 0.3) {
+	    color = tall;
+	} else {
+	    color = mid;
+	}
+
+	outColor = vec4(color+result, 1.0);	
+}