Hey guys,
I'm having a little trouble with my point light. My light is working but the light source moves when I move my camera. I've been trying all week to fix it but at my wits end. Maybe I haven't converted it to the proper space.
**VERTEX SHADER**
in vec3 positions;
in vec2 texCoords;
in vec3 normals;
out vec2 pass_texCoords;
out vec3 mvVertexNormal;
out vec3 mvVertexPosition;
uniform mat4 projectionMatrix;
uniform mat4 modelViewMatrix;
uniform mat4 normalMatrix;
void main()
{
pass_texCoords = texCoords;
vec4 mvPos = modelViewMatrix * vec4(positions, 1.0);
mvVertexNormal = mat3(normalMatrix) * normals;
mvVertexPosition = vec3(modelViewMatrix * vec4(positions, 1.0));
gl_Position = projectionMatrix * mvPos;
}
**FRAGMENT SHADER**
in vec2 pass_texCoords;
in vec3 mvVertexPosition;
in vec3 mvVertexNormal;
out vec4 out_colour;
struct Material
{
int hasNormalMap;
int hasTexture;
vec3 diffuse;
vec3 ambient;
vec3 specular;
float reflectivity;
};
struct PointLight
{
vec3 position;
vec3 colour;
float intensity;
};
uniform sampler2D our_texture;
uniform Material material;
uniform vec3 ambientLight;
uniform float specularPower;
uniform PointLight pointLight;
uniform vec3 viewer_position;
vec4 calculateLight(PointLight light, Material material, vec3 position, vec3 normal)
{
// AMBIENT
vec3 ambient = ambientLight * light.colour;
// DIFFUSE
vec3 norm = normalize(normal);
vec3 lightDir = normalize(light.position - position);
float diff = max(dot(norm, lightDir), 0.0);
vec3 diffuse = diff * light.colour;
// SPECULAR
vec3 viewDir = normalize(viewer_position - position);
vec3 reflectDir = reflect(-lightDir, norm);
float spec = pow(max(dot(viewDir, reflectDir), 0.0), 32);
vec3 specular = specularPower * spec * light.colour;
vec3 result = (ambient + diffuse + specular);
return vec4(result, 1.0);
}
void main()
{
vec4 lightResult = calculateLight(pointLight, material, mvVertexPosition, mvVertexNormal);
out_colour = texture(our_texture, pass_texCoords) * lightResult;
}
The light source is coming from the cube in the red circle. Even the first picture the light isnt directly under the cube. If I don't move my camera and have the cube light source move around automatically the the light will stay with it. It's only if I move the camera that I get problems. The second picture i've moved my camera to the left and the light is moving with me and moving away from the cube light source.
