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scales.glsl
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scales.glsl
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#define SCALE_TYPE_LINEAR 1
#define SCALE_TYPE_LOG 2
#ifdef USE_SCALE_X
#if SCALE_TYPE_x == SCALE_TYPE_LINEAR
#define SCALE_X(x) scale_transform_linear(x, vec2(-0.5, 0.5), domain_x)
#elif SCALE_TYPE_x == SCALE_TYPE_LOG
#define SCALE_X(x) scale_transform_log(x, vec2(-0.5, 0.5), domain_x)
#endif
#endif
#ifdef USE_SCALE_Y
#if SCALE_TYPE_y == SCALE_TYPE_LINEAR
#define SCALE_Y(x) scale_transform_linear(x, vec2(-0.5, 0.5), domain_y)
#elif SCALE_TYPE_y == SCALE_TYPE_LOG
#define SCALE_Y(x) scale_transform_log(x, vec2(-0.5, 0.5), domain_y)
#endif
#endif
#ifdef USE_SCALE_Z
#if SCALE_TYPE_z == SCALE_TYPE_LINEAR
#define SCALE_Z(x) scale_transform_linear(x, vec2(-0.5, 0.5), domain_z)
#elif SCALE_TYPE_z == SCALE_TYPE_LOG
#define SCALE_Z(x) scale_transform_log(x, vec2(-0.5, 0.5), domain_z)
#endif
#endif
#ifdef USE_SCALE_SIZE_X
#if SCALE_TYPE_size_x == SCALE_TYPE_LINEAR
#define SCALE_SIZE_X(x) scale_transform_linear(x, vec2(0.0, 1.0), domain_size_x)
#elif SCALE_TYPE_size_x == SCALE_TYPE_LOG
#define SCALE_SIZE_X(x) scale_transform_log(x, vec2(0.0, 1.0), domain_size_x)
#endif
#endif
#ifdef USE_SCALE_SIZE_Y
#if SCALE_TYPE_size_y == SCALE_TYPE_LINEAR
#define SCALE_SIZE_Y(x) scale_transform_linear(x, vec2(0.0, 1.0), domain_size_y)
#elif SCALE_TYPE_size_y == SCALE_TYPE_LOG
#define SCALE_SIZE_Y(x) scale_transform_log(x, vec2(0.0, 1.0), domain_size_y)
#endif
#endif
#ifdef USE_SCALE_SIZE_Z
#if SCALE_TYPE_size_z == SCALE_TYPE_LINEAR
#define SCALE_SIZE_Z(x) scale_transform_linear(x, vec2(0.0, 1.0), domain_size_z)
#elif SCALE_TYPE_size_z == SCALE_TYPE_LOG
#define SCALE_SIZE_Z(x) scale_transform_log(x, vec2(0.0, 1.0), domain_size_z)
#endif
#endif
#ifdef USE_SCALE_AUX
#if SCALE_TYPE_aux == SCALE_TYPE_LINEAR
#define SCALE_AUX(x) scale_transform_linear(x, vec2(0.0, 1.0), domain_aux)
#elif SCALE_TYPE_aux == SCALE_TYPE_LOG
#define SCALE_AUX(x) scale_transform_log(x, vec2(0.0, 1.0), domain_aux)
#endif
#endif
float scale_transform_linear(float domain_value, vec2 range, vec2 domain) {
float normalized = (domain_value - domain[0]) / (domain[1] - domain[0]);
float range_value = normalized * (range[1] - range[0]) + range[0];
return range_value;
}
float scale_transform_linear_inverse(float range_value, vec2 range, vec2 domain) {
float normalized = (range_value - range[0]) / (range[1] - range[0]);
float domain_value = normalized * (domain[1] - domain[0]) + domain[0];
return domain_value;
}
float scale_transform_log(float domain_value, vec2 range, vec2 domain) {
float normalized = (log(domain_value) - log(domain[0])) / (log(domain[1]) - log(domain[0]));
float range_value = normalized * (range[1] - range[0]) + range[0];
return range_value;
}
float scale_transform_log_inverse(float range_value, vec2 range, vec2 domain) {
float normalized = (range_value - range[0]) / (range[1] - range[0]);
float domain_value = exp(normalized * (log(domain[1]) - log(domain[0])) + log(domain[0]));
return domain_value;
}