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#version 330
#if defined VERTEX_SHADER
in vec3 in_position;
in vec2 in_texcoord_0;
uniform mat4 m_proj;
uniform mat4 m_model;
uniform mat4 m_camera;
out vec2 uv;
void main() {
gl_Position = m_proj * m_camera * m_model * vec4(in_position, 1);
uv = in_texcoord_0;
}
#elif defined FRAGMENT_SHADER
out vec4 fragColor;
in vec2 uv;
uniform sampler2DArray texture0;
uniform float num_layers;
uniform float time;
void main() {
// Get the current and next texture layer
float layer = floor(time);
vec4 c1 = texture(texture0, vec3(uv, mod(layer, num_layers)));
vec4 c2 = texture(texture0, vec3(uv, mod(layer + 1.0, num_layers)));
// Interpolate between the two texture layers
float t = mod(time, 1.0);
fragColor = (c1 * (1.0 - t) + c2 * t) + vec4(0.25);
}
#endif
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