we are tasked to create diffuse lighting for a sphere, but we think we have a bug in our shaders. when we put our shader like this:
vertex shader:
#version 330 core
layout (location = 0) in vec3 position;
layout (location = 1) in vec3 aNormal;
uniform mat4 u_MVP;
uniform mat4 model;
out vec3 FragPos;
out vec3 Normal;
void main() {
//lighting calculations
gl_Position = u_MVP * vec4(position,1.0);
FragPos = vec4(model * vec4(position,1.0)).xyz;
Normal = aNormal;
};
fragment shader
#version 330 core
layout (location = 0) out vec4 color;
uniform vec3 u_Light;
uniform vec4 u_Color;
in vec3 Normal;
in vec3 FragPos;
void main() {
// Light emission properties
// You probably want to put them as uniforms
vec3 LightColor = vec3(1.0, 1.0, 1.0);
vec3 ambient = vec3(0.2, 0.2, 0.16);
vec3 norm = normalize(Normal);
vec3 lightDir = normalize(u_Light - FragPos);
float diff = clamp(dot(norm, lightDir), 0.0, 1.0);
vec3 diffuse = diff * LightColor;
color = (vec4(ambient,1.0f)+vec4(diffuse,1.0)) *u_Color;
color.a = u_Color[3];
//color = vec4(0.0, 0.0, 0.5, 0.1);
};
When we put the positions with the model we have no diffuse lighting. When we put the FragPos with the coords of the position (FragPos = position;) it kind of works, but the light does not change direction. We should note that the normals of the sphere were calculated by a tutorial and were not a creation of ours. Do we have a glaring bug and what did we do wrong?
